csir repeated questions

8/8/2019 CSIR Repeated Questions

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600 Repeated questions of CSIR JRF NET from 2005 - 2009

1. Which one of the following is a green house gas? Carbon dioxide

2. The tallest living tree is Sequoia

3. Which one of the following plants is biennial? Carrot4. Sea weeds are an important source of iodine

5. Polio is caused by virus

6. "Ozone" as such protects the earth from ultraviolet sunrays

7. The climatic changes, soil erosion and decreased rainfall is due to deforestation

8. AGHARK is a quality assurance for agricultural products

9. Refrigeration is a process which slows down the bacterial growth

10. The blue-green algae are photoautotrophs11. Which of the following acts as a coenzyme? Zn++

12. The phenotypic ratio of monohybrid cross is 3:1

13. Smallest measuring unit in cytology is angstrom

14. It is believed that live evolved in its early stage under oxygen-free condition.

Which of the following organisms might have been able to survive in that

environment? Obligate anaerobic bacteria

15. Sexual reproduction is absent in which of the group of fungi mentioned below?

Deuteromycetes

16. One of the characteristics that differentiates prokaryotes from eukaryotes is

Membrane-bound organelles

17. The most common method of vegetative reproduction in usnea is soredia

18. Which of the fungi mentioned below is employed as a genetic tool?

Neurospora

19. Heterotrichous habit is exhibited by Ectocarpus

20. Photosynthesis cannot take place in ultraviolet light

22. What is the cause for deforestation? rapid explosion of human and live stock

population

23. How soil get eroded? by floods and rains

24. The shape of Human Immuno deficiency Virus (HIV) is spherical in shape

26. Polyploidy is most common in plant kingdom


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27. In photosynthesis, the light reaction is known as hill reaction and the dark

reaction is known as Blackman reaction

28. DNA structure was first described by Watson and Crick

29. What is an example for cymose in florescence? Crotalaria

30. Rice is a stape food of people of India. In the milling process, polishing is the

final process and the polished rice is rich in starch

31. The ratio 9:3:3:1 represents a ratio of dihybrid

32. Which one of the following is correctly matched? Manihot Grain

33. Gnetum is a climber

34. Largest living tree on earth is sequoia

35. Protonema appears in the life cycle of Riccia

36. Sugar is obtained from all these

37. When a plat cell is placed in a sugar solution . takes place. Osmosis

38. The kinds of ribose nucleic acid present in any plant cell will be 2

39. Vernation means the arrangement of leaf outside the bud

40. In plants, energy is produced during photosynthesis

41. The yellowing of leaf is caused by the deficiency of iron

42. Identify the correct sequence of evolution in plants: Thallophyte Bryophyte -

Pteridophyte-Gymnosperms

43. The vascular bundles arranged in a cycas petiole is inverted omega (U) shaped

44. Which one of these is correctly matched? Paddy Blast disease

45. When the soil is rich in organic debris, it is known as Humus soil

46. A plant growing inside another plant of different species symbiotically is called

Endophyte

47. "Survival of the fittest" was proposed in his theory of evolution by Darwin

48. In rice polish which is left as a residue none of the above49. This pteridophyte produces two kinds of spores selaginella

50. Lepidodendron is a fossil which represents stem

51. These cells are loosely arranged in a plant body parenchyma

52. Maximum rate of photosynthesis occurs in white light


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80. Autotrophs in an ecosystem are called producers

81. A dye is prepared from indigofera

82. What is the phenotypic ratio of complementary genes in pea? 9:7

83. Thymidine is a nitrogenous base found in DNA85. The first effective vaccine against polio was prepared by Jone E.Salk

86. Which among the following is a non photosynthetic pigment? chlorophyll a

87. Unit of classification is family

88. Plant that grow in saline water are called halophytes

89. Diatomaceous earth is a deposit of organisms of bacillariophyceae

90. The physiological phenomenon considered as a "necessary evil" in plants is

transpiration

91. The type of phyllotaxy in caltropis is opposite decussate

92. Franks produces root nodules in casuarinas

93. Red tides are caused by red algae

94. The development of fruit without fertilization is known as parthenocarpy

95. The agent that carries informantion from DNA to RNA is m-RNA

96. To induce callus which one of the following chemicals is necessary? NAA

97. Arachis hypogaea (groundnut) belongs to the family Musaceae

98. A definite number of cells arranged in a specific manner in an algal colony is

known as thallus

99. Which of the groups of plants mentioned below consists of phycobiont and

mycobiont living together as an unit? Lichens

100. Which of the scientists mentioned below for the first time, observed and

described bacteria? Anton Van Leewenhoek

101. The cambium present within a vascular bundle is known interfascicular

cambium

102. The outermost layers of rice grain endosperm rich in proteins, vitamins and

minerals are known as Aleurone layers

103. Syngenesious anther is an important characteristic feature of

104. Heterospory leading to the establishment of seed habit is observed in

selaginella


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105. Which of the monocots mentioned below shows anomalous secondary

thickening? Asparagus

106. The botanical name for neem is Azadirachta indica

107. Meristeles are usually present is Ferns

108. Winged pollen grains are present in Pinus

109. Aprogeotropic and coral-like roots are produced in taxus

110. What drug is experimented in the treatment of AIDS? AZT

111. Lysosomes are known as Suicide bags

112. The algae used by calvin and his co-workers in elucidating the pathway of

carbon in photosynthesis is Chlorella

113. Heredity characters are carried to the next generation by chromosome

114. Nobel prize for the study of the structure of DNA was won by Watson and

Crick

115. Global warming is due to the release of this gas carbon dioxide

116. The secret behind Mendel's success in his experiments lies in this there are 7

pairs of strikingly contrasting characters in the garden peaplant

117. This is used as a biofertilizer Azolla

119. Choose the appropriate one connected with heterospory ophioglossum,

marsilea

120. Which one of the following is responsible for guttation in Ruhr leaf?

Transpiration

121. The bacterium Escherichia coli is present in the colon of human beings

122. Turpentine is obtained from pinus

123. The metal ion involved in stomatal regulations is potassium

124. Which one of the following is concerned with the production of ATP

molecules? Cisternae

126. The ratio 3:1 is obtained in monohybrid cross

128. Which of the following is not correctly matched? Ethylene Fruit ripening

129. Coralloid roots are found in cycas

130. Pulses contain large amount of proteins

131. Which one is a xerophyte? Ceratophyllum


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132. Which of the following diseases is not caused by bacteria? Influenza

133.Which one of the following is correctly matched? Iwanoski-Discovery of virus

134. Gymnosperms are open seeded plants

135. Reduction division is Meiosis136. The female sex organ of polytrichum is Archegonium

137. DNA mode was first proposed by Watson and Crick

139. Mendel did his hybridization experiments in this plant Pea plant

140. The sun's energy is fixed in the world by green plants

141. Fixation of nitrogen in the soil is done by bacteria

142. Plasmodium belong to this group protozoa

143. Genes are located on chromosomes144. Select the correct order in the life-cycle of a bryophyte Sporophyte-Spores-

Fertilization-Gametophyte

145. Which one of the following is correctly matched? Tetanus-virus

146. The botanical name of Bengal gram is Cicer arietnum

147. Select the correct order of stages in mitosis: Prophase, anaphase, Metaphase,

Telophase

148. A pure breeding dwarf pea plant (tt) on hybridization with a pure breeding tall

plant (TT ) will produce dwarf and tall plants in the ratio (in F2 generation) of 1:3

149. The male sex organ in chara is called as Globule

150. Bacteria were first discovered by Anton Van Leeuvenhoek

151. Which one of the following is correctly matched? Polytrichum-Algae

152. Which one of the following tissues conducts food material in plants? Phloem

153. Penicillin is a/an antibiotic

154. Polio is caused by virus

155. The energy needed by the living organism is ultimately obtained from sum

156. In plants, water is conducted by xylem

157. Peristomes are present in polytrichum

158. The weed which reached India as a contaminant of wheat imported unfrt PL

480 scheme is parthenium


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159. Polio is caused by a virus

160. Tobacco contains a poisonous substance called nicotine

161. Palaeobotany deals with the study of Fossil plants

162. The work 'Biosphere' means total assembly of all living organisms163. Microbial world was discovered is the year 1673

164. Gametophtyes are all these

165. Presence of a cambium indicates open vascular bundle

166. The phyllotaxy of Gnetum is opposite

168. The sperm in cycas is top-shaped and multiciliate

169. Circinate vernation of leaves is a typical character of ferms

170. All fungi are always heterotrophs171. Why blue green algae are called cyano bacteria? because they are prokaryotic

172. The gymnosperms resemble angiosperms in having presence of ovules

173. The disease caused by the fungus colletotrichum falcatum is known as red rot

174. Dendrochronology is the study of age of a tree with the help of annual rings

175. Clove is obtained from which of the plants parts given below? flower buds

177. Which of the algae given below grows in sewage ponds? Volvox

178. Which of the plant groups mentioned below are popularly known asamphibious of plant kingdom? Bryophytes

179. DNA double helical structure was described for the first time by Watson and

Crick

180. Cataclytically active enzyme is called apoenzyme

181. Water droplets at the tip of the leaf are due to guttation

183. The age of a tree can be determined by counting the annual growth rings

184. The name "Traveller's palm" refers to revenala madagas cariensis

185. Phyllode is seen in the plant Acacia melanoxylon

186. Polyploids can be artificially induced by colchicines

187. Parthenocarpy can be induced by IAA

188. Raphanobrassica was discovered by Karpachanko

189. When FADH2 is oxidized, the following number of ATP is produced 2


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190. Half leaf experiment proves the essentiality of CO2

191. The universal Co2 acceptor molecule is called PEP

192. In anoxygenic photosynthesis, which of the following takes part as electron

donors? H2S

193. Velamen root is found in vanda

194. Rosewood is obtained from dalbergia latifolia

195. Penicillin was invented by A.Fleming

196. Spirulina which is a source of SCP is a blue green algae

197. Chlorophyll is formed in the presence of magnesium

198. Hormone involved in phototropism is Auxin

199. Father of genetic is Gregor Mendel

200. The main function of RNA is protein synthesis

201. An example of a Hesperidium is Citrus

202. Which of these is an antibiotic? Aureomycin

203. The number of dry plants in the herbarin found in the Indian botanical garden

at kolkata is about 1 million

204. Mycoses are diseases caused by fungi

205. Which one of the following is not a correct pair in relation to function? Golgi

complex-breakdown of complex molecules

206. The parasitic algae is cephaleuros

207. In which plant are scleroids abundant? none of these

208. The fruiting body namely, cleistothecium is formed in puccinia

209. If the genetic name of the fossil plant ends with "dendron" or "xylon" it

denotes the stem of the fossil

210. Sewage treatment is carried out with the help of bacteria

211. "Ikebana" pertains to floral arrangement212. The bacterium which lives in the human intestine is E. coli

213. The first to isolate a plant virus is W.M. Stanley

214. National Botanical Research institute is situated at Coimbatore


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215. In plants, the radial transport of food, water and mineral salts is performed by

secondary phloem

216. Grafting cannot be practiced in monocotyledonous plants because they do not

have cambium

217. Mycology is the study of fungi

218. The group of plants containing algal and fungal partners in association are

called Thallophytes

219. The largest cell found in plant kingdom is that of Acetabularia

220. Electron microscope was invented by Knoll and Ruska

221. Apple is false fruit

222. Genes are located on the chromosomes in a linear manner

223. Soil erosion leads to loss of vegetation

224. The plant used by Mendel in his early experiments was Pea plant

225. The medicine prepared by genetic exchange in bacteria is Insulin

226. Penicillin was discovered by Alexander Fleming

227. The leaves with sori are called as sporophylls

228. Saprophytic organism is fungi

229. The plant used by Mendel for his research was pea plant

232. Which one of the following statements is wrong about meiosis? it happens inthe meristematic region

235. Which one of the following plants is used in the treatment of Jaundice?

Eclipta

236. Which of the following is wrongly matched? Streptococcus lactis-Vinegar

production

237. The smallest angiosperm is wolfia

238. Identify the correct sequence of following Glycolysis, Krebs' cycle, Electron

transport ATP synthesis

239. Which one of the following is correctly matched? Ribosomes-protein

synthesis

240. The stiffness of paddy straw is due to silica

241. Which of the following plants is endemic? Ginkgo


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242. The wood is made of primary xylem

244. "Berry" fruit is found in Tomato

245. DNA structure was discovered by Watson and crick

246. The growing of plants under soilless condition is called? Hydrophonics247. Spore is a asexual reproductive cell

248. Quickly available respiratory substrate is starch

249. In nature, ammonification takes place in ditch

250. What kind of plant is an 'alga'? chlorophyllous

251. Ganong's photometer is used in the study of transpiration

252. Coconut is dispersed in nature by water

253. Pillar roots of Banyan help in the support of the branches254. The organic compounds that contain nitrogen is protein

255. Which one of the following is a climax forest? Thorn forest

256. Red colour of riped tomato is due to chromatophore

257. Cultivation of trees and vegetables is Arboriculture

258. Jaya is variety of Cotton

259. Absorption of water by plants takes place when the sun shines

260. Which are the most important element necessary for plant growth? Oxygen,Iron, Phosphorus

261. Osmosis is synonymous with none of these

262. What is the first stable product of photosynthesis? Sugar

263. The water absorbed by the plant moves through xylem tissues

264. Ganong's photometer is used to measure the loss of water by plants

265. What does phloem tissue have? sieve elements

266. Piliferous layer of root is produced from epidermal cells267. Endodermis is found as a single layer of cells forming the outermost layer of

the stele

268. The fascicular cambium is present in the stem of sorghum

269. Dixon and jolly formulated their theory on the ascent of sap in plants based on

union of water molecules


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270. Find out the only plant among the four give below. Which is not a xerophyte?

Euphorbia tirucally

271. Which do you find the largest number of Eucalyptus species? India

280.The electron transport chain is a group of molecules located in the outer

membrane of mitochondria

281. What is penicillium? Fungus

282. Inside a seed, the plant remains in a/an dormant state

283. Plasmids are used as vectors in gene transfer. They are present in certain

bacteria

284. Transgenic plants and animals can be produced through genetic engineering

285. Guttation is a process in plants by which excess of water is removed as water

drops286. Ability to fix atmospheric nitrogen is found in some blue green algae

287. Opposite decussate phyllotaxy is seen in Calotropis

288. The natural system of classification was postulated by Bentham and hooker

289. In plants, energy is produced during the process of photosynthesis

290. In which of the following the pollen grains are lilberated as clouds of yellow

powder and also called "Sulphur shower"? Pinus

291. In Botany, the Latin names are used because in whole world there would be

only on name for one plant

292. The flowers are variously coloured to attract insects

293. Agar-Agar is derived from Gelidium

294. The plant which is used as medicine for jaundice is phyllanthus

295. The most commonly used higher plant vector for gene transfer is Ti plasmid

296. Genetic material kof virus is/are DNA (or) RNA

297. Primary organs of photosynthesis are leaves

298. The abundance of blue-green algae in paddy fields results in saving on potash

299. Sessile leaves are seen in Calotropis

300. Angiosperms are spermatophytes

301. The green leaves performing photosynthesis are known as foliage leaves

302. Mango is an example for tree


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303. Mitosis and Meiosis are absent in bacteria

304. Cotton fibres are obtained from cotton fruits

305. Bacteria which are spherical in shape are known as coccus

306. Viruses are in between non-living and living organisms307. Thallophytes used as food include algae and fungi

308. The structure of DNA was discovered by Watson and crick

309. Which of the following flowing is unisexual? Bottle guard

310. The substrate most important for genetic engineering is Nucleous

311. Which of the following is a prokaryote? Blue - green algae

312. With what technology do you associate 'callus' with? pollen analysis

313. Penicillin was discovered by Alexandedr Flemming314. Which of the following is a bacterial disease? Tuberculosis

315. Which one of the following is a woody climber? Gnetum

317. Which one of the following is not a pulse? Chloris barbata

318. E.coli is living in the human intestine

319. Which one of the following is wrong? Man is not responsible for the

destruction of natural resource

320. Direct cell division is otherwise known as Amitosis

321. Which medicine is used in the treatment of AIDS? Azidothymidine

323. Founder of Binomial nomenclature is Carl Linnaeus

324. The roots coverd with fungal hyphens are Mycorrhizal roots

326. We should not sleep under the tree during night because the trees release more

carbon dioxide

327. Which of the following is used in the preparation of digestive tablets? Yeasts

328. The bacterial action in milk is acidic

329. Streptomycin is produced by fungi

330. One of the following is called the vascular cryptogams none of these

331. Disease causing bacteria a called pathogenic

332. Ergot is obtained froms claviceps purpurea

333. after development ovule forms seed


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334. Which of the following can be recyled metal

335. The mechanism of heredity was explained first by Mendel

336. Viruses are inert outside host cell

339. The genetic material of a cell resides in DNA340. Which part of cinchona is used for malaria cure? Bark

341. Arachis hypogea is the binomial name of groundnut

342. Antibiotic penicillin is obtained from fungi

345. A bacteriophage is a virus that attacks bacteria and destroy them

346. Ribosomes in a cell play a significant role in protein synthesis

347. Baker's yeast is saccharomyces cerevisae

348. The tallest tree occurs in gymnosperms349. The poisonous substance that is present is tobacco is nicotine

350. Which of the following is used for culture medium of bacterial growth?

351. one of the following is the simplest land plant Bryophytes

352. Bacteria generally multiply by binary fission

353. Agaar- agar is obtained from gelidium

354. Which of th following grows on wet bread? Yeasts

355. Nitrogen fixation is done by blue-green algae356. Which bacteria produce vinegar in sugar solution? acetobacter aceti

357. Penicillin was discovered by Alexander Fleming

358. Yeasts help in the production of alcohol

359. Many pulses are obtained from plants of the family Fabaceae

360. Emasculation is removal of stamens

361. "Donann equilibrium", a theory which explains the physiological

phenomenon is called mineral absorption362. Bacterial action changes dead leaves into humus

363. Which of the following is not a fruit? Potato

364. Litmus is obtained from an algae

365. 'Gemma Cup' is found in Marchantia


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366. The plants which include underclass hepaticopsida are generally called as

liver worts

367. Which of the following genera possesses long shoots and dwarf shoots? Cycas

368. Each virus is made up of nucleic acid and protein

369. Water of coconut is degenerated liquid endosperm

370. A herbarium is a centre for the preservation of dried specimen of plants

371. Agar-agar is obtained from Geledium

372. Golgi bodies of plant cells are also called as Dictyosoms

373. The nucleic acids of virus must be Either DNA (or) RNA

374. Pollinia are found in one of the following families Apocyanacease

375. The system of binomial nomenclature was proposed by Linnaeous

377. Bacteria which convert atmospheric nitrogen into nitrates are denitrifying

bacteria

378. Parallel venation is found in paddy

379. Hard fibres are generally got from tropical dicot plants

380. Cell membrane fo plant cells are also called as plasma membrane

381. First land inhabiting plants are Gymnosperms

382. The seed germination type found in pinus is hypogeal

383. The process by which plants lose water by liquid status is transpiration

384. The root in mangrove tree is respiratory

385. Mango is a drupe

386. Chlorosis is linked with chlorophyll

387. Paddy is a caryopsis

388. Plant viruses are named as phytophage

389. TMV stands for Tobacco mosaic virus

390. The bacterium found in the large intestine is E.coli

391. The bacterium present in the root nodule of leguminous plant is Rhizobium

392. Anaerobic decomposition of protoin is called ammonification

393. The father of Genetics is Mendel

394. The genotypic ratio of monohybrid ratio is 1:2:1


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395. The double helix model of DNA was proposed by Watson and crick

396. Common cold is viral disease

397. W.M. Stanley got Nobel Prize for virus

398. Apical dominance in higher plants is due to hormones400. The pollen grains of flowers pollinated by insects are rough and sticky

401. Soyabean contains a high degrees of proteins

402. The age of a tree can be determined by counting the growth rings of its stem

404. Ground becomes slippery during the rainy season due to green algae

405. Which one of the following is a useful functional association between fungi

and the roots of higher plants?mycorrhiza

406. Carbon is available to plants as carbon dioxide

407. Photosynthesis is a bio-chemical process for the transfer of solar energy to

food chain cycle

408. The fruit in member of poaceae is Caryopsis

409. The function of flower is reproduction

410. Penicillium is generally known as Fungus

411. The biggest herbarium of our country is located in Kolkata

412. Polytrichum plants belong to bryophyte

413. Which of the following flowers is sessible? Mustard

414. Adiantum sporophytic plants have chromosome type of diploid

415. In which of the following is xerophytic present? Calotropis

416. The study of inflorescence, flowers, fruits and seeds is known as reproductive

morphology

417. In insectivorous plants which of the following elements is absenst or deficent

Nitrogen

418. Viruses chemically called as nucleoproteins419. Penicillin was discovered by Alexander Fleming

420. The metal present in chlorophyll is magnesium

421. Based on the cellular type the algae chlorella belongs to Both (A) and (B)


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422. Three major types of sexual reproduction found in algae may be isogamy,

anisogamy and oogamy

423. Those algae which grow in hot spring at about 85?C temperature are called as

424. To which of the following families do all pulses belong? Sporophytic phase

425. The evergreen plant body of gymnosperms is sporophytic phase

426. The ovules of an ovary are not naked in which of the following groups?

Angiosperms

427. Gigantism is a result of Auto-polyploidy

428. The most important purpose of insects to visit a flower is to collect honey

429. The inflorescence axis in banana is used to remove kidney stones

430. Who first discovered the penicillin? Alexanderd Fleming

431. Epiphytes are plants which depend an other plants only for shelter

432. Who has discovered the cell? Robert Hook

433. Which one of the following plants is an example of herb?Hibiscus

434. The sharp and pointed outgrowth present on the stem of rose are called spines

435. 'AIDS' is caused by virus

436. Streptomycinis produced from Streptomyces griseus

437. Iodine is obtained from Gelidium

438. The broad leaves of tall trees absorb rain clouds

439. Diffusion means the movement of molecules from a region of greater

concentration to lesser concentration

440. In some plants fruit formation takes place without fertilization which is called

as parthenocarpy

441. Centrl Rice Research Institute is in Cuttack

442. The bacterium which has flagella all over the body is called as peritrichous

443. Moistur absorbing roots are seen in vandal444. Secondary growth (or) width enlargement is usually absent in

Monocotyledons

445. The number of plant species described on our earth is overd 4,00,000

446. The first person to see a cell under microsecope was Hooke


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447. The drug chloromycetin is used for which disease?Tuberculosis

448. Leprosy is caused by bacteria

449. The study of external form of a plant is known as Morphology

450. A group of cells similar in structure and function is tissue451. Those flowers which have both male and female reproductive parts are called

unisexual

452. The other nama of the plant taxonomy is systematic botany

453. Plants takes nitrogen in the form of nitrates

454. Edible fungi are Agaricus

455. One of the following is useful for cheese making penicillium

456. Waterblooms are produced by algae

457. Viruses are all of these

458. Bacteria reproduce mostly asexually

459. Atmospheric CO2 can be reduced by the process of photosynthesis

460. which of the following cannot grow indeserts of Rajasthan? Banana

461. Bacteria are both (A) and (B)

462. Soil conservation is the process where soil is protected against erosion

463. Phytology is the study of algae

464. The largest flower is Rafflesia

465. The molecule with high energy phosphate bond in the cell is ATP

466. The root nodules containing Rhizobia occur in Fabaceae

467. Pasteurization of milk destroys its pathogenic bacteria

468. Atmospheric nitrogen is fixed in leguminous roots by bacteria

469.Gymnosperms are characterized by lacking ovaries

470. In food making industry the product of yeast culture utilised isethyl alcohol

471. One of the following is responsible for smut disease ustilago

472. Sexual reproduction is about in blue-green algae

473. Algin is obtained from brown algae

474. The virus which attacks E.coli is termed coliphage


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475. Laminaria is an important source of iodine

476. 'Pond silk' is the common name of spirogyra

477. Pneumonia is caused by one of the following bacteria

478. Cotton fibre is obtained from the fruit479. The largest producer of groundnut is India

480. India's largest mineral resource is coal

481. The gas evolved by leaves during photosynthesis is oxygen

482. After fertilization ovary is transformed into fruit

483. Green trees of the forests are generally called as food chain primary producers

484. Streptomycin was discovered by Waksman

485. Kelp is brown algae486. Habitat of penicillium is organic substance

487. Monocotyled are chaaracterised by fibrous root system

488. Typhoid is caused by bacteria

489. The ovules in gymnosplerms are exposed

490. Cell division useful for gamete formation is meiosis

491. Herbicide is used to kill the weeds

492. Tap root is positively geotropic493. Seedless fruits are seen in all of these

494. Most advanced plants in the plant kingdom are angiosperms

495. Fibres are taken from plant as sclerenchyma cells

496. The process in which fruit is formed without fertilization is known as

parthenocarpy

497. Calotropis is an example of the following phyllotaxy opposite and decussate

498. Phylloclade is a modified stem499. Which of the following diseases is likely to spread in the entire community. If

a leaky septic tank contaminates the water supply? Cholera

500. Where would the bacterium E.coli be readily found? human

501. Quinine is made from cinchone bark


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502. Phylllanthus nirui is a medicinal herb and it is used to cure jaundice

503. The dark reaction was worked out by an American scientist called Melvin

Calvin

504. "Breathing roots" of mangrove plants are also called both (B) and (C)

505. Hydroponics is plant growth in liquid culture medium

506. Red tides are causd by red dinoflagellates

507. In angiosperms ovules develop into seeds

508. 'Tikka' disease is found in groundnut

509. The unicellular algae used in space craft to regulate oxygen supply is chlorella

510. Who is the well known Indian paleobotanist? Birbal sahni

511. Sharbati, Sonara, Kalyan Sona are the improved varieties of wheat

512. An algae yielding single cell protein of economic importance is spirulina

513. The process of transfer of desirable characters from on especies to other is

known as selection

514. Wide variety of plants are observed in this tropical regions

515. Mycotoxins are pollutants because they affect most commonly water

516. Orchards are fruit garden

517. Foreign countries want to get plant materials of this plant from our country

keeping in view the problem of chemical pesticides Azadirachta indica (neem)

518. Nitrogen fixation is generally brought about by Bacteria and blue green algae

519. "Pasteurization" means boiling and cooling to prevent microbial spoilage

521.Why is sprouted gram considered more nutritious? germinating seeds produce

enzymes which are a rich source of protein

522. Which metal is present in green leaves? Magnesium

523. Pollinium found in the family Asclepiadaceae and Orchidaceae

524. Legume root nodule contains a protein pigment known as Leghaemoglobin525. From the following,which one is edible fungi? Agaricus

526. Which type of cell gives mechanical support to the plant?Sclerenchyma

527. A sequence of nucleotides that specifies a particular polypeptide chain is

called as gene


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528. Cell wall is chemically made up of lignin, pectin and cellulose

529. Endocarp of fruit wall is innermost layer of fruit wall

530. Which group of organism is responsible for enriching soil fertility is an area?

Micro-organisms

531. Amphibious plants with non-vascular nature group is called as bryophytes

532. Biggest herbarium located in south India is Coimbatore

533. Smallest flowering plant is wolffia

534. Economic use of the genus araucaria gymnosperm plant is ornamental plant

535. First plant viruses were discovered in tobacco

536. The most characteristic feature of arthropoda is jointed appendages

537. The most successful vector in higher plants Ti-plasmid

538. one of the following is essential for seed germination water

539. The process by which RNA is formed from DNA is called transcription

540. Some plants develop fruits without fertilization, this phenomenon is called

parthenocarpy

541.Which one of sthe following diseases is caused by viral infection? Jaundice

542. Symbolic nitrogen fixation is done by Rhizobium

543. Lack of which element makes the plant insectivorous?Nitrogen

544. Founder of binomial nomenclature is Cark Linnaeus

545. Part of cinchona plant from which the drug quinine is obtained is bark

546. Turbantine is obtained from the plants of coniferales

547. Clover,the commonly used spice is obtained from the flower bud

548. Which one of the following p;ants produces allergenic pollen grains? congress

grass

549. Opium is obtained from cannabis

550. Which one of the following is correctly matched? photosynthesis Starchsynthesis

551. Which one of the following is a major green house gas? CO2

552. The flow of genetic information from nucleic acid to protein is called

transcription


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553. Oxygen in the universe is replenished higher plant photosynthesis

554. Limnophylla haterophylla is an example of Amphibious plant

555. An example for a parasitic algae is cephaleuros

556. Atmospheric nitrogen can be fixed by Anabaena557. In dycot roots, xylem is exarch

558. 'The father of Genetics''is G.J. Mendel

559. Which one of the following is not a hormone? Lodine

560. Western Blot test is used in the diagnosis of AIDS

561. Pulses are rich in proteins

562. The pulp of the pear fruit is hard, because of the presence of sclereids

563. Pedology refers to the study of soil564. The powerhouse of a cell is mitochondrion

565. The following medicine is obtained from the bark of cinchona Quinine

566. which one of the following is not a plant product? Rubber

567. Which of the following is inpotant element of chlorophyll? Magnesium

568. Grasses have fibrous roots

569. Primary producers are green plants

570. The five kingdom concept was proposed by Whittaker571. "callus'' is referred as undifferentiated mass of tissues

572. Number of chromosomes in an organism is maintained by the following

division. Meiosis

573. Vascular cryptogams are pteridophytes

574. The raw materials used in the fermentation activity, in yeasts is (are) sugars

and fruit juices

575. Artificial silk is prepared from synthetic fibres

576. The plant involved in sericulture is mulberry

577. Which one of the following is not correctly matched? Vessel translocation of

sugar

578. Which one of the following is called as " maiden hair fern''? Adiantum

579. A plant cel is distinguished from an animal cell by the presence of cell wall


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580. The sporophyte develops from zygote

581.Geotropis can be demonstrated using clinostat

582. Who introduces binomial nomenclature? Linnaeus

583. Which one of the following is a complex tissue? Xylem584. Which of the following cereals was among the first to be used by man? Barley

585. Transport of food materials in dicot plant is through Phloem

586. In India, the Research Institute in palaeobotany Lucknow

587. Distinction between plant and animal cells lies in respiration

588. The powerhouse of the cell is Mitochondria

589. Which part of the cauliflower is used as vegetable? Inflorescence

590. Which of the following is not found in plants? Vitamin B12591. Insectilvorous plants capture insects for obtaining Nitrogen

csir repeated questions

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