PHOTOSYNTHESIS REVIEW
2Photorespiration lowers the efficiency of photosynthesis by removing which of the following from the Calvin cycle? ribulose bisphosphate molecules
Refer to the processes given below to answer the following question(s), indicating the pathway(s) in which they occur. Each pathway may be used once, more than once, or not at all.
1. respiration only
2. photosynthesis only
3. both respiration and photosynthesis
4. neither respiration nor photosynthesis
4 Chemiosmotic synthesis of ATP.3
6Reduction of NADP+. 2
8 Electron flow along a cytochrome chain. 3
10 Why are C4 plants able to photosynthesize with no apparent photorespiration? They use a more efficient enzyme to initially fix CO2.
12 Which of the following statements about the light reactions of photosynthesis is True? The splitting of water molecules provides a source of electrons . Chlorophyll (and other pigments) absorb light energy which excites electrons. An electron transport chain is used to create a proton gradient. ) Some electrons are recycled and some are not.
14From the photosynthetic action spectrum in Figure 10.2, we cancorrectly conclude that plants can use all colors of visible light for photosynthesis.
16 The reactions of the Calvin cycle require all of the following molecules CO2. ATP. RuBP. . NADPH+.
18 You have just discovered a new flower species that has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment? red and yellow
20The chemiosomotic process in chloroplasts involves theestablishment of a proton gradient.
22The statements Are true of the carbon-fixing reactions of the Calvin cycle?..Three turns produce one molecule of glyceraldehyde... Each step requires an enzyme.... The synthesis of one glucose molecule requires 18 ATP and 12
NADPH... Ribulose bisphosphate is regenerated after each turn of the cycle.
24 Because bundle sheath cells are relatively protected from atmospheric oxygen, the level of photorespiration is held to a minimum in C4 plants.
26All of the following compounds are required (i.e., are necessary \F constituents for chemical reactions) at some stage of green plant photosynthesis, EXCEPT oxygen.
28On which of the following features do plant and animal cells differ?. primary energy source
30Where do the light-independent reactions of photosynthesis takeplace? stroma of the chloroplast
32The color of light least effective in driving photosynthesis is. green.
34In plant cells, ATP is made in response to light. An electron transport chain is involved. This electron transport chain is found in the thylakoid membranes of chloroplasts.
36The process of noncyclic photophosphorylation uses light energy tosynthesize ATP and NADPH.
38 Photosynthesis stores energy in complex organic molecules and respiration releases it.
Refer to the choices below to answer the following question(s). Each choice may be used once, more than once, or not at all. Indicate whether the following events occur during:
1. photosynthesis
2. respiration
3. both photosynthesis and respiration
4. neither photosynthesis nor respiration
40Synthesis of ATP by the chemiosmotic mechanism.3
42Reduction of NADP+.1
44Electron flow along a cytochrome chain.3
46Generation of proton gradients across membranes. 3
-->
<