Bio 1111 Chp. 8 quiz

Three of the same species of plant are each grown under a different colored light for the same amount of time. Plant A is grown under blue light, Plant B is grown under green light, and Plant C is grown under orange light. Assuming the plants use only chlorophyll aand chlorophyll b for photosynthesis, what would be the predicted order of the plants from most growth to least growth? a. A, C, B b. A, B, C c. C, A, B d. B, A, C

a. A, C, B

Which of the following structures is not a component of a photosystem? a. ATP synthase b. antenna molecule c. reaction center d. primary electron acceptor

a. ATP synthase

Which of the following components is not used by both plants and cyanobacteria to carry out photosynthesis? a. chloroplasts b. chlorophyll c. carbon dioxide d. water

a. chloroplasts

Which statement correctly describes carbon fixation? a. the conversion of CO2 into an organic compound b. the use of RuBisCO to form 3-PGA c. the production of carbohydrate molecules from G3P d. the formation of RuBP from G3P molecules e. the use of ATP and NADPH to reduce CO2

a. the conversion of CO2 into an organic compound

How many photons does it take to fully reduce one molecule of NADP+ to NADPH? a. 1 b. 2 c. 4 d. 8

b. 2

Predict the end result if a chloroplast's light-independent enzymes developed a mutation that prevented them from activating in response to light. a. G3P accumulation b. ATP and NADPH accumulation c. Water accumulation d. Carbon dioxide depletion

b. ATP and NADPH accumulation

Plants containing only chlorophyll b are exposed to radiation with the following wavelengths: 10nm (x-rays), 450nm (blue light), 670nm (red light), and 800nm (infrared light). Which plants harness the most energy for photosynthesis? a. X-ray irradiated plants b. Blue light irradiated plants c. Red light irradiated plants d. Infrared irradiated plants

b. Blue light irradiated plants

Which statement about thylakoids in eukaryotes is not correct? a. Thylakoids are assembled into stacks. b. Thylakoids exist as a maze of folded membranes. c. The space surrounding thylakoids is called stroma. d. Thylakoids contain chlorophyll.

b. Thylakoids exist as a maze of folded membranes.

From which component of the light-dependent reactions does NADPH form most directly? a. photosystem II b. photosystem I c. cytochrome complex d. ATP synthase

b. photosystem I

In which compartment of the plant cell do the light-independent reactions of photosynthesis take place? a. thylakoid b. stroma c. outer membrane d. mesophyll

b. stroma

Which order of molecular conversions is correct for the Calvin cycle? a. RuBP + G3P → 3-PGA → sugarRuBP + G3P → 3-PGA → sugar b. RuBisCO → CO2 → RuBP → G3PRuBisCO → CO2 → RuBP → G3P c. RuBP + CO2 → [RuBisCO] 3-PGA → G3PRuBP + CO2 → [RuBisCO] 3-PGA → G3P d. CO2 → 3-PGA → RuBP → G3PCO2 → 3-PGA → RuBP → G3P

c. RuBP + CO2 → [RuBisCO] 3-PGA → G3PRuBP + CO2 → [RuBisCO] 3-PGA → G3P

Where in eukaryotic cells does the Calvin cycle take place? a. thylakoid membrane b. thylakoid lumen c. chloroplast stroma d. granum

c. chloroplast stroma

Which complex is not involved in the establishment of conditions for ATP synthesis? a. photosystem I b. ATP synthase c. photosystem II d. cytochrome complex

c. photosystem II

What two main products result from photosynthesis? a. oxygen and carbon dioxide b. chlorophyll and oxygen c. sugars/carbohydrates and oxygen d. sugars/carbohydrates and carbon dioxide

c. sugars/carbohydrates and oxygen

If four molecules of carbon dioxide enter the Calvin cycle (four "turns" of the cycle), how many G3P molecules are produced and how many are exported? a. 4 G3P made, 1 G3P exported b. 4 G3P made, 2 G3P exported c. 8 G3P made, 1 G3P exported d. 8 G3P made, 4 G3P exported

d. 8 G3P made, 4 G3P exported

Which molecule must enter the Calvin cycle continually for the light-independent reactions to take place? a. RuBisCO b. RuBP c. 3-PGA d. CO2

d. CO2

How are the NADPH and G3P molecules made during photosynthesis similar? a. They are both end products of photosynthesis. b. They are both substrates for photosynthesis. c. They are both produced from carbon dioxide. d. They both store energy in chemical bonds.

d. They both store energy in chemical bonds.