Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 3TYU
How is photosynthesis similar in C4 plants and CAM plants?
(A) In both cases, only photosystem I is used.
(B) Both types of plants make sugar without the Calvin cycle.
(C) In both cases, rubisco is not used to fix carbon initially.
(D) Both types of plants make most of their sugar in the dark.
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43) Which of the following is false?
A) C3, C4, and CAM plants use the light dependent reactions to harvest energy from
the sun and light independent reactions to turn that energy into sugar.
B) C3 plants use photorespiration (as opposed to the Calvin Cycle) when CO2 is low
) C4 plants utilize a specialized carbon fixation enzyme and a unique cell structure
to reduce the problems of photorespiration
D) CẢM plants perform all of the steps of photosynthesis at night to avoid e
photorespiration
Which best describes cyclic photophosphorylation?
(a) it uses two photosystems (b) it produces water as a waste product (c) it produces oxygen as a waste product (d) it utilizes a single photosystem
(e) it uses substrate level phosphorylation to produce ATP
Typically the CO2 necessary for photosynthesis enters through the stomata of the plant leaves suppose petroleum jelly was used to coat the leaves out of this tomato blocked or closed
a) what effect will this have on the light reactions in these leaf cells
b) what effect will this have on the Calvin cycle in these leaf cells
Chapter 10 Solutions
Campbell Biology
Ch. 10.1 - Prob. 1CCCh. 10.1 - Prob. 2CCCh. 10.2 - Prob. 1CCCh. 10.2 - Prob. 2CCCh. 10.2 - Prob. 3CCCh. 10.3 - Prob. 1CCCh. 10.3 - Prob. 2CCCh. 10.3 - Prob. 3CCCh. 10.4 - Prob. 1CCCh. 10.4 - Prob. 2CC
Ch. 10.4 - Prob. 3CCCh. 10.4 - Prob. 4CCCh. 10.4 - Prob. 5CCCh. 10.5 - Prob. 1CCCh. 10.5 - Prob. 2CCCh. 10.5 - Prob. 3CCCh. 10.5 - Prob. 4CCCh. 10.6 - Prob. 1CCCh. 10 - Prob. 10.1CRCh. 10 - Prob. 10.2CRCh. 10 - Prob. 10.3CRCh. 10 - Prob. 10.4CRCh. 10 - Prob. 10.5CRCh. 10 - Prob. 10.6CRCh. 10 - The light reactions of photosynthesis supply the...Ch. 10 - Which of the following sequences correctly...Ch. 10 - How is photosynthesis similar in C4 plants and CAM...Ch. 10 - Prob. 4TYUCh. 10 - Prob. 5TYUCh. 10 - In mechanism, photophosphorylation is most similar...Ch. 10 - Prob. 7TYUCh. 10 - Prob. 8TYUCh. 10 - EVOLUTION CONNECTION Photorespiration can decrease...Ch. 10 - SCIENTIFIC INQUIRY MAKE CONNECTIONS The following...Ch. 10 - Prob. 11TYUCh. 10 - SYNTHESIZE YOUR KNOWLEDGE Watennelon snow in...
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- Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?arrow_forwardWhat is the overall purpose of the light reactions in photosynthesis?arrow_forwardWhich of the following correctly sequences the steps of non-cyclic electron transport? a) Chlorophyll molecules absorb UV radiation exciting electrons which flow through photosystem I, returning to the chlorophyll molecules b) Electrons donated from water molecules pass through photosystem I then photosystem II before returning to the chlorophyll molecules, generating ATP in the process c) Water is oxidized by the capture of light energy; these excited electrons are passed through the dark reactions, returning to chlorophyll during the final light reactions d) The ATP and NADPH generated by the reactions of photosystem II and photosystem I are utilized by the Calvin Cycle to build high energy glucose moleculesarrow_forward
- Plants have evolved by developing mechanisms that promote entry of CO, into the Calvin Cycle (CC) to limit photorespiration when environmental conditions tend to favor the latter. This is because photorespiration 1) is energetically inefficient (consuming more ATP than the CC alone) and 2) it does not produce any sugars that can be "fed" into cellular respiration to produce lots more ATP. A) Under what environmental conditions does photorespiration "outcompete" that of the CC? Specifically, what mechanism is responsible for committing the cell to photorespiration and what type of plant does not have any "safeguards" to ensure that the CC is performed rather than photorespiration? B) Describe the mechanisms employed by two types of plants to minimize photorespiration and ensure that the CC is carried out even when environmental conditions are not in their favor. Be sure to identify 1) the type of plant, 2) its natural environment and how it affects the plant's ability to perform the CC,…arrow_forwardThe Calvin cycle, the "dark reaction" or Carbon fixation reactions of photosynthesis, cannot occur at night in a living plant. Which of the following best describes why this is true? A) The stomata are incapable of opening at night, thus CO2 cannot enter the leaf B) The reactions of the Calvin cycle are dependent on light reactions for high-energy compounds C) Several enxymes necessary for Calvin cycle activity have been degraded during the day and must be replaced D) Light is required to transport the water necessary for the cycle E) Cooler temperatures at night slow enzyme activity and rates of substrate diffusionarrow_forwardWhich of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correctarrow_forward
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