Photosynthesis Homework
e. synthesize simple sugars from carbon dioxide
What is the primary function of the Calvin cycle? a. transport RuBP out of the chloroplast b. use NADPH to release carbon dioxide c. split water and release oxygen d. use ATP to release carbon dioxide e. synthesize simple sugars from carbon dioxide
c. 420 mm
What wavelength of light in the figure is most effective in driving photosynthesis? a. 575 mm b. 475 mm c. 420 mm d. 625 mm e. 730 mm
c. light reactions alone
For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. Produces NADPH: a. neither the light reactions nor the Calvin cycle b. the Calvin cycle alone c. light reactions alone d. both the light reactions and the Calvin cycle e. occurs in the chloroplast but is not part of photosynthesis
a. the Calvin cycle alone
For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. Requires CO2: a. the Calvin cycle alone b. light reactions alone c. both the light reactions and the Calvin cycle d. neither the light reactions nor the Calvin cycle e. occurs in the chloroplast but is not part of photosynthesis
e. both photosynthesis and respiration.
Generation of proton gradients across membranes occurs during a. The Krebs cycle. b. photosynthesis. c. respiration. d. neither photosynthesis nor respiration. e. both photosynthesis and respiration.
b. ATP and NADPH.
The light reactions of photosynthesis supply the Calvin cycle with a. H2O and NADPH. b. ATP and NADPH. c. sugar and O2. d. light energy. e. CO2 and ATP
d. Photosynthesis stores energy in complex organic molecules, while respiration releases it.
Which of the following statements best describes the relationship between photosynthesis and respiration? a. Respiration is the reversal of the biochemical pathways of photosynthesis. b. ATP molecules are produced in photosynthesis and used up in respiration. c. Photosynthesis occurs only in plants and respiration occurs only in animals. d. Photosynthesis stores energy in complex organic molecules, while respiration releases it. e. Respiration is anabolic and photosynthesis is catabolic.
d. neither the light reactions nor the Calvin cycle
For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. Produces NADH: a. the Calvin cycle alone b. light reactions alone c. both the light reactions and the Calvin cycle d. neither the light reactions nor the Calvin cycle e. occurs in the chloroplast but is not part of photosynthesis
c. light reactions alone
For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. Produces molecular oxygen (O2): a. the Calvin cycle alone b. both the light reactions and the Calvin cycle c. light reactions alone d. neither the light reactions nor the Calvin cycle e. occurs in the chloroplast but is not part of photosynthesis
e. the Calvin cycle alone
For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. Produces three-carbon sugars: a. both the light reactions and the Calvin cycle b. occurs in the chloroplast but is not part of photosynthesis c. neither the light reactions nor the Calvin cycle d. light reactions alone e. the Calvin cycle alone
c. the Calvin cycle alone
For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. Requires ATP: a. light reactions alone b. neither the light reactions nor the Calvin cycle c. the Calvin cycle alone d. occurs in the chloroplast but is not part of photosynthesis e. both the light reactions and the Calvin cycle
a. neither the light reactions nor the Calvin cycle
For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. Requires glucose: a. neither the light reactions nor the Calvin cycle b. the Calvin cycle alone c. light reactions alone d. occurs in the chloroplast but is not part of photosynthesis e. both the light reactions and the Calvin cycle
d. A and C (a. thylakoid membrane; c. inner mitochondrial membrane)
In a plant cell, where are the ATP synthase complexes located? a. thylakoid membrane b. plasma membrane c. inner mitochondrial membrane d. A and C e. A, B, and C
c. oxidative phosphorylation in cellular respiration
In mechanism, photophosphorylation is most similar to a. carbon fixation. b. the Calvin cycle. c. oxidative phosphorylation in cellular respiration. d. reduction of NADP+. e. substrate-level phosphorylation in glycolysis.
a. removal of electrons from chlorophyll molecules
In photosynthesis, which process is most directly driven by light energy? a. removal of electrons from chlorophyll molecules b. ATP synthesis c. reduction of NADP+ molecules d. carbon fixation in the stroma e. creation of a pH gradient by pumping protons across the thylakoid membrane
b. photosynthesis.
Reduction of NADP+ occurs during a. neither photosynthesis nor respiration. b. photosynthesis. c. glycolysis d. both photosynthesis and respiration. e. respiration.
e. Other pigments absorb light in addition to chlorophyll a.
The figure shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different? a. Green and yellow wavelengths inhibit the absorption of red and blue wavelengths. b. Oxygen given off during photosynthesis interferes with the absorption of light. c. Aerobic bacteria take up oxygen which changes the measurement of the rate of photosynthesis. d. Bright sunlight destroys photosynthetic pigments. e. Other pigments absorb light in addition to chlorophyll a.
e. splitting the water molecules
When oxygen is released as a result of photosynthesis, it is a by-product of which of the following? a. the electron transfer system of photosystem I b. chemiosmosis c. the electron transfer system of photosystem II d. reducing NADP+ e. splitting the water molecules
d. stroma of the chloroplast
Where do the enzymatic reactions of the Calvin cycle take place? a. electron transport chain b. thylakoid membranes c. thylakoid space d. stroma of the chloroplast e. outer membrane of the chloroplast
b. stroma of the chloroplast
Where does the Calvin cycle take place? a. outer membrane of the chloroplast b. stroma of the chloroplast c. thylakoid membrane d. chlorophyll molecule e. cytoplasm surrounding the chloroplast
b. release of oxygen
Which of the following does not occur during the Calvin cycle? a. carbon fixation b. release of oxygen c. oxidation of NADPH d. consumption of ATP e. regeneration of the CO2 acceptor
