navodaya vidyalaya samiti – bhopal...

Navodaya Vidyalaya Samiti – Bhopal Region.

JAWAHAR NAVODAYA VIDYALAYA,CLASS-XIITH

SESSION-2013-14BLUE PRINT

UNIT NO. WEIGHTAGELA(NO.OF QUESTION)

SA-2(NO.OF QUESTION)

SA1(NO.OF QUESTION)

VSA(NO.OF QUESTION)

IREPRODUCTION 14 5(1) 3(2) 2(1) 1(1)

IIGENETICS ANDEVOLUTION

18 5(1) 3(2) 2(2) 1(1)

IIIBIOLOGY IN HUMAN WELFARE

14 3(3) 2(2) 1(1)

IVBIOTECHNOLOGYAND ITSAPPLICATION

10 3(1) 2(2) 1(3)

VECOLOGY ANDENVIRONMENT

14 5(1)* 3(1) 2(2) 1(2)

TOTAL 70 5(3)=15 3(9)=27 2(10)=20 1(8)=8

XII Class Biology – Resource Material Page 219


JAWAHAR NAVODAYA VIDYALAYA SAMPLE PAPER 2012-2013

CLASS:12TH MARKS: 70

SUBJECT:BIOLOGY TIME: 3hrs

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GENERAL INSTRUCTIONS

1. Section A consists of 8 question of one mark each. Section B consist of 10 question of 2 marks each section C consist of 9 question of 3 marks each and section D consist 3 question of 5 marks each.

2. All questions are compulsory.

3. Draw labeled diagrams wherever necessary

--------------------------------------------------------------------------------------------------------------------- SECTION-A

1. Which main technique and instrument is used to isolate DNA from a plant cell?

2...Name the organization that produced ‘Saheli’ pill.

3. How is diapause different from hibernation?

4. Suggest any two techniques, which can help in early determination of bacterial and viral infections much before the symptoms appear in the body.

5. In a nucleus, the number of RNA nucleotide triphosphate is 10 times more than the number of DNA nucleoside triphosphate, still only DNA nucleotides are added during the DNA replication and not the RNA nucleotides. Why?

6. Why is it desirable to use unleaded petrol in vehicles fitted with catalytic converters

7. Name the two techniques involved in controlled breeding experiments.

8. What is microinjection?.

SECTION-B

9. A non-haemophilic couple was informed by their doctor that there is possibility of a haemophilic child being born to them. Draw a checker board and find out the percentage of possibility of such a child among the progeny.

10. Name the interaction in the each of the following

(i) Cuckoo lays her eggs in the crow’s nest.

XII Class Biology – Resource Material 20


(ii) Orchid groups on a mango tree (iii) Ticks live on the skin of dogs(iv) Sea anemone is often found on the shell of hermit crab.

11. Name the blank spaces A, B, C, and D given in the following table.

12. It has been recorded that the temperature of the Earth’s atmosphere has increased by 0.6o C.

(i) What has caused this increase?(ii) Explain its consequence

OR Identify the type of the given ecological pyramid and give one example each of pyramid of number and pyramid of biomass in such cases.

13. Explain the work carried out by Cohen and Boyer that contributed immensely in biotechnology.

14. Why is the introduction of genetically engineered lymphocytes into an ADA deficiency patient not a permanent cure? Suggest a possible permanent cure.

15. What is the function of placenta?

16. What is Eutrophication?.

17. When a red flowered Antirrhinum plant was crossed with a white flowered Antirrhinum plant, the F1 offspring had pink flowers. Mention the genotype of F1 plant.

18.Draw labeled diagram of nucleosome. SECTION- C

19. What is the genetic basis for proof that codon is a triplet and is read in a contiguous manner without punctuations?

20. A vector is engineered with three features, which facilitate its cloning within the host cell. List the three features and explain each one


Type of Microbe

Name Commercial Product

BacteriumFungus ‘C’Fungus

‘A’‘B’Monascus purpureusPenicillium notatum

Lactic AcidCyclosporin-AStatins‘D’


21. Name the pioneer species on the bare rock. How do they help in establishing the next type of vegetation? Mention the type of climax community that will ultimately get establish

22. How did Hardy-Weinberg explain that allelic frequencies in a population are stable and are constant from generation to generation?

23. Draw a well labeled diagram of an antibody molecule.

OR Give reasons for the following statements

(i) Neutrophils and macrophages are called soldiers and scavengers of the animal body.(ii) After consuming alcohol, one should avoid driving.(iii) Persistant use of corticosteroids is harmful.

24. If you are a manager of a dairy farm. What measures would you undertake to improve the quality and quantity of milk production?

25. Some ornithologists observed decline in the bird population in an area of a lake, after the setting of an industrial unit in the same explains the reason.

26. Expand the following and explain any one of them,i. IVF II. ZIFT III. IUI IV.MTP

.27. Describe briefly about India's initiative in attaining total reproductive health.

SECD

28. (i)List some causes for air pollution.

(ii) Why all the bushes of Delhi were converted to run on CNG by end of 2002?

(iii) Draw the Diagram of electrostatic precipitator.

OR (i) Define the following terms

(a) Climax community (b) Sere (c) Ecological succession (d) Pioneer species

(ii) State the use of biodiversity in modern agriculture.

29. Draw a labeled diagram of the sectional view of a mature pollen grain in angiosperms. Explain the functions of its different parts.

OR (i) Give a schematic representation showing the events of spermatogenesis in human males.

(ii) Describe the structure of a human sperm

30. What is DNA fingerprinting? Mention its applications.



OR A normal male marries a carrier female for haemophilia. What is the possibility of male child being haemophilic and what is the probability of female carrier? What is the probability of female child infected?

ANSWERS

1. Ans: - Technique-Centrifugation , Instrument-Centrifuge

2. Ans: - In the central Drug Research Institute (CDRI), Lucknow

3. Ans: - Hibernation is the phenomenon commonly depicted by cold-blooded animals, which escape cold by hiding them in shelters such as, burrows muds, etc., revealing minimum physiological activity. Diapause is the phenomenon of spending unfavorable climate conditions by the insects during their development.

4. Ans: - (i) PCR (ii) ELISA test.

5. Ans:- Inspite of large number of RNA nucleotide triphosphate only DNA nucleotides are added during the DNA replication due to 3’-5’ exonuclease proof reading activity of DNA polymerase. It has high degree of accuracy.6. Ans:- Catalytic converters possess expensive metals platinum-palladium and sodium catalyst, which oxidizes CO→CO2 and NO→NO2 presence of lead will head to inactivation of catalyst. Therefore, unleaded petrol is used by the catalytic converter.

7. Ans: Controlled breeding experiments are carried out by using artificial insemination and multiple ovulation embryo transfer technology (MOET)

8. Ans: Microinjection is the method of introducing recombinant DNA by directly injecting it into the nucleus of an animal cell

9. Ans :-

Phenotypes ratio is 50% daughter normal XX 50% daughter carrier XX 50% son normal XY 50% son haemophilic - XY

10.Ans :- (i) Brood Parasitism

(ii) Commensalism

(iii) Parasitism



(iv) Mutualism

11.Ans:-

12.Ans :- (i) Increase in atmosphere concentration of greenhouse gases (CO2) has resulted in rise of

atmospheric temperature by 0.6o C (global warming).

(ii) (a) Effect on weather and climate by rising temperature. (b) Changes in water labels of sea (c) Effects on food production

OR

Ans: - The type of ecological pyramid is declining type. Pyramid of number of tree ecosystem is inverted. Pyramid of biomass of pond ecosystem is inverted

13.Ans:- Cohen and Boyer discovered Restriction Enzymes (RE) and observed the capability of cutting DNA strands in a particular manner . Cohen had developed a method of removing these plasmids and reinserting it into other cell.

14.Ans: Lymphocytes are not immortal but are short lived; hence patient requires periodic infusion of such genetically engineered lymphocytes. However if a gene producing ADA is isolated from marrow cells and introduced into the cells at early embryonic stages it could be a permanent cure

15.Ans: FunctionsPlacenta secretes hormones like HCG (Human Chorionic Gonadotropin),HPL—Human Placental Lactogen, estrogen and progesterone, necessary to maintain pregnancy.It facilitates the supply of oxygen and nutrients to the embryo and removes waste materials produced by the embryo.

16.Ans: Eutrophication: Phosphorus and nitrates of fertilizers when dissolved in water act as nutrients and accelerate the growth of algae that ma form a mat on the water surface. This increases productivity of the water body, called as Eutrophication.The algae use oxygen and may deoxygenate ate the water enough to kill the fish and other animals. The algal mat at the water surface may block light to the submerged plants


Type of Microbe

Name Commercial Product

BacteriumFungus

Fungus Fungus

LactobacillusTrichodermapolysporumMonascus purpureusPenicillium notatum

Lactic AcidCyclosporin-A

StatinsPenicillin


17.Ans: RR(Red) rr(white)—Parents

R r

Rr(Pink) --- f1 generation

Genotype of F1 generation: RrThis is an example of incomplete dominance

18.Ans:

19. Ans :- Since, there are only four bases, which code for twenty amino acids, the code should be made up of three bases, i.e., (4×4×4) = 64 codons.

If the codon consists of four letters only (4×4) sixteen codes are possible, which is less then the required. Hence the codon is triplet. As the ribosome moves on mRNA the codons are read in contiguous manner

20. Ans:- The three features are

(i) Origin of Replication/ori Site from here, the replication starts (and any piece of DNA when linked can be made to replicate within the host cell.

(ii) At least two Selectable Markers Helps in identifying and eliminating non transformants.

(iii) Unique Restriction Sites the foreign DNA links to the region of

21. Ans: - Pioneer species on a bare rock is lichen.

Lichen secretes acid to dissolve rock.Help in weathering and soil formation.



Later give the way to some very small plants like bryophytes, which are able to take hold in the small amount of soil.Bigger plants grow and after several more stages, ultimately a stable climax forest community is formed.

Climax community remains stable as long as the environment remains unchanged. With time , the xerophytic habitat gets converted into a mesophytic one

22. Ans: The gene pool (total genes and their alleles in a population) remains a constant, this is called genetic equilibrium. For example,When individual in a population is simply p2 and both the chromosomes of a diploid individual is simply the product of the probabilities, i.e., q2 similarly q2 and 2qp.

p2+ 2pq+q2 = 1

Binomial expansion of (p+q) 2 when frequency measured difference from expected values, the difference in direction indicates the extent of evolutionary change

23. Ans:- Structure of an antibody molecule

OR

(i) Neutrophils and macrophages dispose of microbes and dead cells by feeding on them. Hence, they are called soldiers and scavengers of the animal body.

(ii) Consumption of alcohol causes blurred vision; slow response impairs judgment and reduces coordination of limbs. Hence, one should avoid driving after consuming alcohol.

(iii) Persistant use of corticosteroids is harmful because it causes osteoporosis

24 Ans: - Various measures to be undertaken are (i) Selection of high yielding and disease resistance breeds. (ii) Good quality and quantity of fodder to be given to cattle.



(iii) Maintaining good hygienic conditions among cattle and the handlers. (iv) Proper storage and transport facilities should be provided. (v) Monitoring of cattle health through regular visit by a vet nary doctor

25. Ans:- Bird population in an area of a lake may decline due to biomagnifications caused by industrial effluents discharged in water bodies.Toxic substance, present in Industrial waste water enters the aquatic food chain. Toxic substance is accumulated by an organism and passed onto next higher trophic level, e.g., DDT.

Its concentration is increased by from, 003 ppm to 25 ppm in fish eating birds. High concentration of DDT disturbs the calcium metabolism and causes thinning of egg shell and premature breaking causing decline in bird population.

26. Ans: i. IVF- In Vitro Fertilization Ii.ZIFT- Zygote Intra Fallopian Transfer

Iii.IUI- Intra Uterine Transfer Iv.MTP- Medical Termination of PregnancyIUI- This technique helps in artificial insemination. In this technique, the semen collected either from the husband or from a healthy donor is artificially introduced either into the vagina or into the uterus (IUI) of the female

27. Ans: India was among the first countries in the world to initiate action plans and programmes at a national level to attain total reproductive health as a social goal.

i.'Family planning ' was initiated I 1951 and was periodically assessed over the past decades.Ii.Improved programs covering wider reproductive areas are currently in operation under the popular name 'Reproductive and Child Health Care (RCH) programs'.Iii.Creating awareness among the people about various reproduction related aspects and providing facilities and support for building up a reproductively healthy society are the major tasks under these programs

28.Ans :- (i) Causes for Air Pollution Smoke stacks of thermal power plants.

Smelters and other industries release participate and gaseous air pollutants together with harmless gases such as, nitrogen and ox

(ii) All bushes were converted to run by CNG by the end of 2002 because CNG is better than diesel. (a) CNG burns most efficiently unlike petrol or diesel in the automobiles and very

little of it is left unburnt. (b) CNG is cheaper than petrol or diesel, cannot be siphoned off thieves and

adultered like petrol or diesel.

(iii) Diagram of electrostatic precipitator



OR (i) (a) Climax Community :The composition and structure of community constantly change in response to the changing environmental conditions. These changes lead finally to a community that is near equilibrium with the environment and that is called a climax community.

(b) Sere: the entire sequences of communities that successfully change in a given area are called sere.(c) Ecological Succesion: The gradual and fairly predictable change in the species composition of a given area is called ecological succession.(d) Pioneer Species: The species that invade a bare area are called pioneer species.

(ii) Use of Biodiversity in Modern Agriculture:Agrochemicals cause pollution of soil and water and are too expensive for farmers.Genetic modification has made the crops more tolerant to abiotic stresses like cold, heat, drought, salinity, etc. It has reduced the dependence of crops on chemical pesticides as they are pest resistant.

29.Ans :- A mature pollen grain has two layered wall-outer exine and the inner intine. Mature pollen grain contains a large vegetative cell along with vegetative nucleus and a small generative cell.

The function of different parts of pollen grain is

(i) Exine outer layer exine is made up of sporopollenin, which is resistant to physical and biological decomposition. Exine has one or many germ pores on its surface which are associated with the germination of pollen grains.

(ii) Intine Inner layer intine is pecto-cellulosic in nature. It is a associated with the germination of pollen tube.



(iii) Vegetative cell. It is the large portion of pollen grain with sufficient food reserve. Its function is to provide the medium for the to movement of male gametes in pollen tube.

(iv) Generative cell. It divides mitotically to produce two functional male gametes. Therefore, generative cell contains male gametes.

OR

(i)Schematic representation of Spermatogenesis

(ii) Structure of Sperm Sperm consists of following four parts.

(a) Head It contains a large haploid nucleus, capped by acrosome. The acrosome contains hydrolytic enzymes that help in dissolving the membrane of ovum during fertilization.



(b) Neck this region contains proximal centriole, which is necessary for the first cleavage division of zygote and the distal centriole that is connected to the tail filament.

(c) Middle Piece It contains numerous mitochondria which provide energy for the movement of sperm.

(d) Tail It contains axial filaments surrounded by the plasma membrane. It helps the sperm to swim in a fluid medium.

30.Ans :- DNA fingerprinting is a technique used to identify individuals on the basis of their DNA profile. It is based on the fact that DNA of one individual is about 90% identically the DNA of another individual, but 10% of the DNA is different. Thus 10% of DNA is unique and used to distinguish individuals.

Application of DNA Fingerprinting(i) In Forensics A tiny bit of a person’s body parts such as hair or skin can be used identify the criminal by this technique.(ii) Paternity Testing The genome of every individual is the combination of genomes of father and mother. A close comparison of DNA band of a child with that of father gives direct evidence of his paternity. A step child will have different DNA bands. In India, first paternity dispute was solved in Tellichery Kerala. In 1991, Indian Judiciary accepted this technique as evidence in the court of law.(iii) Diagnosis of Hereditary Diseases Diseases like haemophilic thalassemia, Alzheimer’s, Huntington’s and many can be diagnosed using this technique.(iv) Selecting Antibiotics for Treatment Disease causing bacteria develop resistance to antibiotics. This is a matter of concern DNA fingerprinting is used to identify the antibiotics for which the bacterium is resistant and thus select the right antibiotic for treatment.ORMale sex is determined by Y-chromosome which does not bear the gene for haemophilia. When a normal marries as a carrier female, the resultant off springs will as follows.

Normal man Carrier woman XY XXh --Parents

X Y X Xh -- Gametes

XX XXh XY Xh Y —Offspring

Normal girl Carrier girl Normal boy haemophilic boy 1 1 1 1



This marriage result in four types of offspring’s in equal ratio, i.e.,Normal girl with XX genotypeNormal boy with XY genotypeCarrier girl with XXh genotypeHaemophilic boy with Xh genotypeThe haemophilia does not show up in the carrier because the second X chromosome possesses the allele for normal blood clotting, 50% of boys develop haemophilia because Y chromosome does not carry allele for blood clotting. Hence, female child can be a carrier but does not develop haemophilia while the male child can develop the Trait.



SAMPLE QUESTION PAPER

SECTION-A

1. PMNL-neutrophils are included in which types of barrier?

2. Name the vector of dengue and chikungunya disease?

3. What role do macrophages play in providing immunity to humans?

4. What is the another name of secondary response?

5. Name the cancer causing virus?

6. Name the baker s yeast used in fermentation?

7. Name a genus of a fungus that forms mycorrhiza?

8. What causes swelling of the lower limbs in patients suffering from filariasis?

SECTION –B

9. Name the enzyme produced by Streptococcus bacterium ?Explain its importance in medical science?

10. What is metastasis ?Why is it fatal?

11. Name any two varieties of cheese and mention the kind of microbe used?

12. Name the millet crops which hybrids have been developed in India .Mention their characteristics also?

13. Differenciate between primary sludge and Activated sludge?

14. (a) Name the lymphoid organ in human being where all the blood cells are produced?

(b)Where do the lymphocytes produced by the lymphoid organ mentioned above migrate and how do they affect immunity?

15. Draw a labeled diagram of antibody?

16. Fill in the blanks a, b ,c and d in the following table:-

Organism Disease/symptom

a Fluid filled alveoli



Salmonella b

c Malignant maleria

d Common cold

17. Match the column:-

(a) Biopesticide - (i)Streptomyces griseus

(b)Biofertilizer - (ii)Bacillus turengensis

(c)antibiotics - (iii)Azotobactor

(IV) NVP

18. Expand the following:-

1. IARI

2.KVIC

SECTION-C

19. In the given flow diagram ,the replication of retrovirus in a host is shown .Observe and answer

(a) Fill (1) and (2)

(b) Why is virus called retrovirus?

(c) Can the infected cell survive while viruses are being replicated and released?

Retrovirus

↓ Virus infected normal cell

Viral DNA is introduced in host cell

↓

1

↓ Viral genetic material in nucleus in host cell

Viral DNA incorporates into host genome



↓

2

↓Viruses come out of the host cell

New virus can infect other cells

20. In which part of the body of the hosts do the following events in the life cycle of plasmodium take place ?Name both the body part and the host?

(a)Fertilization

(b)Development of gametocytes

(c)Release of sporozoites

(d)Asexual reproduction

21. Identify a,b,c,d,e,f,in the table given below:-

Disease Crop plant

Brown rust a

b sugercane

Late blight c

d Crucifers

Tobacco mosaic e

f Brassica

22. a-Write the chemical nature of antibody.

b-Name the cell that produced antibody in humans.

c-Mention the type of immune response provided by an antibody.

23. 2.A person shows strong unusual hypersensitive reaction when exposed to certain substances present in the air? Identify the condition .Name the cells responsible for such reaction .What precaution should be taken to avoid such reaction?



24. Name the drug used :-

(a)As a effective sedative and pain killer

(b)For helping patients to cope with mental illness like depression ,but often misused.

(c)How does the moderate and high dosage of cocaine affect the human body?

25. A person injured in a road accident and requiring an argent response was brought to a doctor.

(a)What did the doctor immediately do?

(b)What kind of immunity was providing to the patient?

(c) Define this kind of immunity?

26. Write the nutritional quality of following:-

(a)Hybrid maize

(b)Atlas 66

(c)Iron- fortified rice

27. .(a) Baculoviruses are excellent candidates for integrating pest management in an ecologically sensitive area. Explain giving two reason.

(b)What is organic farming?

SECTION-D

28. (i) Identify a,b,c and d in the table given below:-

Microorganism product Biological activity Medical ailment

a Streptokinase Clot buster d

Trichoderma polyspora

b c Transplant surgery

(ii)Write the function of statins ?

0R



Give appropriate scientific terms for each of the following:-

(a) The over all ability of the host to fight the Disease causing organisms.

(b)An antiviral protein produced by the cells invaded by a virus.

(c) The WBcs that constitute cells of immune system.

(d)The substance which when introduced into the body ,stimulate the production of antibodies.

(e) A class of protein that act as antibodies.

29. (a)Fill in the blanks

Tomato cell X Potato cell

↓

I--------------(Cell wall digesting enzyme)

↓

Fusion

↓

II---------------

(Name the process)

III---------------

(Name of the plant)

IV---------------

(Term use to denote such plant)

(b) Define somaclones?

OR

Give technical term equivalent to the following:-

(a) The loss of fertility and productivity as a result of inbreeding.



(b) Sudden and heritable change in a character of an organism.

(c) Sum total of all the alleles of the gene present in a crop and its related species.

2. Define biofortification?

3 .Write about Atlas-66 ?

30. (a) How are biofertilizer different from fertilizer? Justify the role of rhizobium as a biofertilizer?

(b)Write any two names of cyanobacteria which can fix atmospheric nitrogen?

OR

For remaining awake and alert to study for longer hours ,Rashmi has started taking antisleep tablets.As her friend how will you deal with the situation?



ANSWERS FOR SAMPLE PAPER

SECTION-A

1. Cellular barrier 1

2. Aedes mosquitoes 1

3. Macrophages phygocytose and destroy the microbes (pathogen)and provide protection from disease. 1

4. Anamnestic response. 1

5. Oncogenic virus. 1

6. Saccharomyces cerevisiae. 1

7. Glomus 1

8. The filarial worms (Wuchereria bancrofti W.malayi) live in the lymphatic vessels of the lower limbes and cause inflammation. 1

SECTION-B

9. Streptokinase,clot buster patient who have suffering from myocardial infection. 1+1

10. Cancerous cell get sloughed off from tumour ,spread to different sites through the body fluids and produced secondary tumours wherever they are lodge. 1

-Since there are no single cure and secondary tumour are produced in several parts of the body,it becomes fatal. 1

11. Swiss cheese-bacterium-Propionibacterium sharmanii 1

Roquedfort cheese-employs a fungus 1

12 Jowar and bajara 1

Hybrids are:-1. High yield 1/2

2.Resistance to water stress- 1/2

13. Primary sludge:-All solids that settle down during the primary treatment of sewage constitute 1

Activated sludge:-The sediments formed by the flocs during the secondary treatment of sewage constitute 1



14. a)Bone marrow 1/2

(b) Some of the lymphocytes move to thymus for maturation into T-lymphocytes ,they are involved in cell mediated immunity. 1/2

Some of them remain in the bone marrow to become B-lymphocytes and are involved in the humoral immunity , they produced specific antibodies. 1

15. Diagram-(any four lebeling) each -1/2 =2

16. a-Streptococcus pneumoniae 1/2

b-Typhoid 1/2

c-plasmodium falciparum 1/2

d-Rhino virus 1/2

17. (a) Biopesticide - (ii) Bacillus turengensis,(iv) NPV- 1/2 +1/2

(b) Biofertilizer - (iii) Azotobactor 1/2

(c ) antibiotics - (i)Streptomyces griseus -1/2

18. 1.Indin agriculture research institute- 1

2. Khadi and village industries commission - 1

SECTION

19. (a) (i)Viral DNA produced by reverse transcription 1

(ii)New viruses are produced 1/2

(b)It is RNA virus where reverse transcription is performed to form viral DNA. 1 1

(c)Yes (e .g .HIV in macrophages) 1/2

20. (a)Inside stomach/Intestine of Mosquito host 1



(b)In blood of human host 1/2

(c)In blood of human host 1/2

(d)Inside liver cells and RBcs of human host 1

21. a-wheat - 1/2

b-red rot - 1/2

c-potato - 1/2

d-Black rot- 1/2

e-Tobacco- 1/2

f-white rust- 1/2

22. a-Glycoprotein 1

b-B-lymphocytes- Plasma cellsAntibodies 1

c-Humoral immune response or antibody mediated immune response 1

23. Allergy 1

Mast cell 1

(i)Avoid contact with allergen (ii) Using antiallergic drugs like antihistamine. 1/2+1/2

24. (a)Morphine 1/2

(b)Lysergic acid diethylamides or barbiturates 1

(c) Moderate doses of cocaine have a stimulating action on the central nervous system and produces a sense of euphoria and increased energy. 1

High doses of cocaine causes hallucination. 1/2

25. (a)Injection of antitetanus serum having performd antibodies. 1

(b)Passive immunity against tetanus because bacteria are often present on road and rusted articles. 1



(c)Passive immunity is the development of resistance to a disease by directly injecting the antibodies or antitoxins against the pathogen. 1

26 . (a)Had twice the amount of amino acid lysine and tryptophan.-

(b)Having a high protein content-1

(c)Variety containing over five times as much iron as commonly consumed varieties- 1

27. ( a) (i)These viruses are species specific and narrow spectrum insecticide that attack insects and other arthropods.

(ii)They have no negative impacts on non target insects,plants and other animals. 1 (b)Organic farming refers to the use of biofertiliser and biopestisides.

SECTION-D

28. (i) a-Streptococcus species 1

d-Myocardial infarction 1

b-Cyclosporin 1

c-Immunosupressive 1

(ii) Blood cholesterol agent- 1

or

(a)Immunity 1

(b)Interferon 1

(c)Lymphocytes 1

(d)Antigen 1

(e)Immunoglobulins 1

29.(a)

I-Cellulase and pectinase 1



II-Somatic hybridization 1

III-Pomato 1

IV- Somatic hybrid 1

(b)These are the genetically identical plants developed from any part of the plant by tissue culture. 1

OR

1. (a) Inbreeding depression 1

(b)Mutation 1

(c) Gene pool 1

2. The apical and axillary meristem are the best suited parts of plant for the production of virus free plants. 1

3. Atlas -66 is a is a wheat variety having a high protein content. 1

30 . Differences:-

1+1+1

Biofertiliser Fertiliser

- Biofertilisers are organism that enrich the nutrient quality of the soil

-They provide almost all the nutrients but slowly.

-They do not degrade the soil quality.

- Fertiliser are synthetic chemicals added to soil to supply specific nutrients that is/are lacking

-They supply only the specific nutrients but immediately after application.

-They degrade the soil quality.

Rhizobium lives in the root nodules of leguminous plants ,It fixes the atmospheric nitrogen into those forms of nitrogen compounds ,that can be utilized by plant. 1

XII Class Biology – Resource Material 2


(b) Anabana , Nostoc, Ocillatoria (any two)- 1/2+1/2

OR

Antisleep tablets (e.g. methedrine,Dexedrine,Benzedrine) do bring about alertness and increased activity.However they dull the mental capability so that awaking for longer hours do not add to increase in study hours.Rather they bring about depression,sleeplessness,nausea and vomiting which cause of study. 2

Councelling is an important component of helping an addict to come out of the addiction.

1. I would ask Rashmi to study for two hours without using the drug and after taking the drug .By comparision she will find the study without drug is more beneficial than with the drug. 1

2. Absence of sound sleep must have started affecting her efficiency and body fitness. The same would be highlighted. 1

3. Giving her a company during the study hours by me or her family member can rid Rashmi of the habit of taking the tablets. 1



CLASS : XII (Sc.); SUBJECT: (BIOLOGY)

M.M.:70 ; TIME: 3 HRS.

General instructions:

1. All question are compulsory.

2. The question paper consists of four sections A,B,C&D.Section A contains 8 questions of one mark each, Section B contains 10 questions of two marks each, Section C contains 9 questions of three marks each & Section D contains 3 questions of five marks each.

3. There is no overall choice. However, internal choice is provided in few question where student should attempt only one of the alternative given.

4. wherever necessary, neat labeled diagram should be drawn.

SECTION : A

Q1.Chromosome number in meiocyte of Rice plant is 34. Write the chromosome number in its endosperm? (1)

Q2. Which kind of evolution is shown by the thorn & tendril of bougainvillea & Cucurbita? (1)

Q3How water pollinated flowers protect the pollen grains from get wetting? (1)

Q4.What kind of chromosomal disorder results in the genetic disorder of Klinefelter‘s syndrome? (1)

Q5.Some cells release interferons. Why? (1)

Q6.Name the bio-reactive molecule used as immunosuppressive agent & mention the organism from which it is produced? (1)

Q7.Identify the kind of population interaction of a barnacle growing on whale? (1)

Q8. What type of biomass status the following pyramid represents: (1)



SECTION: B

Q9.Differentiate between Chasmogamous & Cleistogamous flower. (2)

Q10 Explain the following: i) GIFT ii) I C S I (2)

Q11.i) what kind of disorder leads to the disease Phenylketonuria?

ii) What is the resultant effect of the disorder in man? (2)

Q12. Name the blank spaces a, b, c, and d from the table given below: (2)

Type of Microbe Scientific name Commercial product

Bacterium A Lactic acid

Fungus B Cyclosporin A

C Monascus purpureus Statin

Fungus Penicillium notatum D

Q13.i) Write the use of Cyclosporin A & write the name of the organism from which it is

Produced?

ii) Give one example each of fermented beverages with &without distillation. (2)

Q14. The steps in a programme are: (2)

Collection of germplasm

Crossbreeding the selected parents

Selecting superior recombinant progeny

Testing, releasing and marketing new cultivars.

(a) What is this programmme related to?

(b) Name two special qualities as basis of selection of the progeny.

(c) What was the outcome of the programme?



(d) What is the popular term given to this outcome? Also name the Indian scientist

who is credited with chalking out of this programme.

Q15.i) Expand GEAC. (2)

ii) Mention two modern biotechnological techniques for early molecular diagnosis of diseases.

Q16.Differentiate between Exponential &Logistic growth with the help of population growth curve. (2)

Q17 .Differentiate between in-situ & ex-situ conservation of biodiversity with suitable example (2)

Q18.i) what is e-waste?

ii) Mention different kinds of impurities present in waste water. (1+1=2)

SECTION : C

Q19.i) Explain Hardy-Weinberg equilibrium with suitable example.

ii) Mention five factors affecting Hardy-Weinberg equilibrium. (2+1=3)

Q20. Draw a neat diagram of structure of a Nucleosome & label four parts of it.

OR

Draw a neat diagram of structure of Human sperm & label four of its parts. (3)

Q21. Answer the following about Opioid drugs:

i) Name opioid receptors in human body

ii) Give one example of opioid drug

iii) How it is extracted

iv) How it is taken by man



v) What is its effect on human body?

vi) Chemical name of the drug. (3)

Q22. Explain the following in relation to sewage treatment: (3)

i) Floc

ii) BOD

iii) Anaerobic sludge digesters.

Q23. i)What is Biomagnification?

ii) What is meant by Green house effect? (1+2=3)

Q24. Explain the steps involved in the process of Decomposition in the ecosystem. (3)

Q25.How biotechnological application for production of Pest resistant could be developed in Bt cotton plant. (3)

Q26. i) Explain the oral administrative contraceptive device & time period of its effectiveness.

ii) Give example of one copper releasing & one hormone releasing IUDs. (2+1=3)

Q27. Mention the six steps followed in the technique of DNA fingerprinting. (3)

SECTION: D

Q28 Explain role of following hormones with reference to menstrual cycle. (5)

(a) FSH

(b) LH

(c) Estrogen

(d) Progesterone

(e) Oxytocin

OR

i) Explain the stages of Megasporogenesis in flowering plants with the help of suitable diagram.

ii) Draw a neat labeled diagram of mature pollen grain.

iii) Differentiate between Perisperm & Pericarp.

Q29.i) Draw a neat labeled diagram of a Transcription unit & define the following:



a) Function of RNA polymerase III b) Splicing c) Tailing.

ii) What is Frame-shift insertion? (3+2=5)

OR

i) Differentiate between Benign tumor & malignant tumor.

ii) Mention two methods of detection & diagnosis of cancer.

iii) Write any two methods for prevention of drug abuse in adolescence. (1+2+2=5)

Q30 Answer the following questions:

i. Why are engineered vectors preferred by biotechnologists for transferring the

desired genes into another organism?

ii. Explain how ‘ori’, “selectable marker” do and “cloning sites” facilitate cloning

into the vectors.

OR

Answer the following questions:

(a) How mature insulin is different from proinsulin secreted from the pancreas in

human.

(b) Explain how human functional insulin produced using rDNA technology.

(c) Why is the functional insulin thus produced considered better than the one used

earlier by diabetic patients?


navodaya vidyalaya samiti – bhopal...

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