–photosynthesis utilizes _____. a. the entire electromagnetic spectrum b. only visible light c....
TRANSCRIPT
– Photosynthesis utilizes _____.
A. the entire electromagnetic spectrum B. only visible light C. radio and microwaves D. gamma rays
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Which of the following is true?
A. High energy photons like those in UV radiation are dangerous to cells. B. Short-wavelength radiation like that in gamma rays has photons of high energy content. C. Visible light photons promote electrons to higher electron shells without damaging cells. D. all of the above ___
Which of the following is only minimally absorbed by chlorophylls a and b?
A. violet light B. green light C. blue light D. red light
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Photosynthetic pigments capture _____ of the solar energy that reaches the earth.
A. less than 2% B. 20% C. 50% D. 100%
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The importance of photosynthesis is that photosynthetic organisms produce ____ for the biosphere.
A. CO2 B. H2O C. organic food D. all of the above
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Which of the following do NOT perform photosynthesis?
A. plants B. animals C. algae
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The piece of equipment that measures how much light passes through a sample is called a _____.
A. spirometer B. gas chromatograph C. spectrophotometer D. calorimeter
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The rate of photosynthesis can be measured by measuring the production of _____.
A. CO2 B. H2O C. O2 ___
The pigments which are primarily responsible for the metabolic activity associated with photosynthesis are the _____.
A. chlorophylls B. carotenoids
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The reactants of photosynthesis include all of the following except _____.
A. solar energy B. carbohydrates C. H2O D. CO2
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The oxygen given off by photosynthesis comes from ___________.
A. CO2 B. CH2O C. H2O D. the atmosphere
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In a eukaryotic cell, photosynthesis occurs in the _____.
A. chloroplast B. mitochondria C. nucleus D. golgi complex
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The photosynthetic pigments are found in the _____.
A. stroma B. SER C. Golgi complex D. thylakoids ___
CO2 reduction occurs in the _____.
A. thylakoids B. stroma C. nucleus D. grana
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During photosynthesis CO2 is _____ to form carbohydrates.
A. oxidized B. reduced ___
Chloroplasts will be found in _____.
A. plant leaf cells B. photosynthetic bacteria C. animal cells D. all of the above
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The energy-capturing reactions take place during the _____ reactions.
A. light-dependent B. light-independent
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When NADP+ accepts electrons it becomes _____.
A. CO2 B. (CH2O) C. NADPH D. H2O
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The light-independent reactions take place in the ___________.
A. thylakoids B. grana C. mitochondria D. stroma ___
When the thylakoid pigments absorb solar energy, low energy electrons are removed from _____.
A. (CH2O) B. H2O C. CO2 D. all of the above
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Light can be _____ by a pigment.
A. absorbed by (taken up) B. reflected by (given off) C. transmitted (passed through) D. all of the above ___
When electrons from chlorophyll a move down an electron transport system _____ is produced.
A. NADP+ B. H2O C. ATP D. carbohydrate
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Which of the following is true of the cyclic electron pathway?
A. ATP and NADPH are both produced. B. this pathway probably evolved after the non-cyclic electron pathway. C. the solar energy is absorbed by the PS I antenna complex. D. all of the above
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Which of the following is a product of the noncyclic electron pathway?
A. ATP B. O2 C. NADPH D. all of the above ___
During the noncyclic electron pathway, electrons move from water through PS II to PS I and then to _____.
A. ADP B. CO2 C. NADP+ D. glucose
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Which of the following is NOT a product of the light-dependent reactions?
A. ATP B. O2 C. glucose D. NADPH
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When H+ flow down their electrochemical gradient through _____ ATP production occurs.
A. PS I B. PS II C. ATP synthase D. the stroma ___
The light-dependent reactions take place in the _____.
A. stroma B. thylakoids C. cytosol D. cristae
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During the light-dependent reactions, H2O is _____.
A. oxidized B. reduced
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The antennae complex is composed of _____.
A. chlorophyll a B. chlorophyll b C. carotenoid pigments D. all of the above ___
Which product of the light-dependent reactions is used in the light-independent reactions?
A. O2 B. NADPH C. ATP D. both B and C ___
The energy and electrons needed for the reduction synthesis are supplied by _____.
A. NADPH B. ATP C. CO2 D. both A and B ___
A plant can use PGAL to make _____.
A. sucrose B. oils C. cellulose D. all of the above ___
The first step of the Calvin cycle is
A. CO2 fixation B. PGAL reduction C. RuBP regeneration D. ATP synthesis
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CO2 fixation occurs when CO2 combines with _____.
A. ribulose bisphosphate B. gylceraldehyde -3-phosphate C. NADP D. glucose
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About 20-50% of the protein content in chloroplasts is _____ which speeds up CO2 fixation.
A. glyceraldehyde-3-phosphate B. NADPH C. ATP D. RuBP carboxylase ___
Which correctly describes the light independent reactions?
A. ATP is produced B. CO2 is reduced C. sunlight is required D. O2 is produced
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Five molecules of PGAL are used to produce _____ so that the Calvin cycle can continue.
A. NADPH B. RuBP C. glucose D. oxaloacetate
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The six-carbon molecule resulting from carbon-dioxide fixation immediately breaks down to form __________.
A. 2, three-carbon PGA molecules B. 3, two-carbon PGA molecules C. glucose D. RuBP
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In a C4 plant, the __________ cells contain chloroplasts.
A. bundle sheath B. mesophyll C. both A and B ___
C4 plants fix CO2 to _____.
A. PEP B. RuBP C. PGA D. oxaloacetate
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The stomates of the leaves _____.
A. close when the weather is hot and dry B. take up CO2 C. allow H2O to leave the leaf D. all of the above ___
A solution to global warming is _____.
A. plant more shrubs and trees B. use fewer fossil fuels C. protect the rainforests D. all of the above ___
During photorespiration, _____ combines with RuBP carboxylase.
A. O2 B. CO2 C. PGA D. glucose
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