Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 8, Problem 3TYK
Which of the following is a correct step in the light-dependent reactions of the Z system?
a. Light is absorbed at P700, and electrons flow through a pathway to NADP+, the final acceptor of the linear pathway.
b. Electrons flow from photosystem II to water.
c. NADP+ is oxidized to NADPH as it accepts electrons.
d. Water is degraded to activate P680.
e. Electrons pass through a thylakoid membrane to create energy to pump H+ through the cytochrome complex.
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W
hen a culture of Chlamydomonas is exposed to HIGH intensity light, the cells will display negative phototaxis and move away from the light.
Which of the following could act as a cellular signal triggering movement away from the light?
A.
Low levels of P700+ relative to P700 in the chloroplast.
B.
High levels of G3P in the cytosol.
C.
High levels of NAD+ relative to NADH in mitochondria.
D.
Low levels of ATP relative to ADP in the cytosol.
You have discovered a novel peptide that, when administered to plant cells, spontaneously inserts into the thylakoid membranes and forms a channel that lets protons cross the membrane. You treat plant cells growing normally with your peptide. Which of the following statements correctly describes the effect on photosynthesis shortly after the addition of the peptide? Select all that are true.
a.
The rate of Glyceraldehyde 3-phosphate synthesis will decrease
b.
The rate of oxygen production will be unaffected
c.
The rate of Glyceraldehyde 3-phosphate synthesis will increase
d.
The rate of oxygen production will decrease
e.
The rate of oxygen production will increase
f. The rate of Glyceraldehyde 3-phosphate synthesis will be unaffected
Which of the following statements is TRUE?
Select one:
a. The immediate product of the light energy absorbed by the P680 reaction center is used to produce NADPH.
b. In cyclic photophosphorylation, the chlorophyll is reduced by electrons liberated from water molecules.
c. The O2 gas produced during photosynthesis is derived from CO2.
d. In noncyclic photophosphorylation, electrons from water are used directly for the reduction of P700.
e. All of the statements are false.
Chapter 8 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 8.1 - What are the two stages of photosynthesis?Ch. 8.1 - In which organelle does photosynthesis take place...Ch. 8.2 - What is the difference in function between the...Ch. 8.2 - Prob. 2SBCh. 8.2 - What is the difference between the linear electron...Ch. 8.3 - What is the reaction that rubisco catalyzes? Why...Ch. 8.3 - How many molecules of carbon dioxide must enter...Ch. 8.4 - Prob. 1SBCh. 8.4 - Prob. 2SBCh. 8.4 - How are carbon fixation and the Calvin cycle...
Ch. 8.5 - How are the reactants and products of...Ch. 8 - An organism exists for long periods by using only...Ch. 8 - Prob. 2TYKCh. 8 - Which of the following is a correct step in the...Ch. 8 - Prob. 4TYKCh. 8 - Prob. 5TYKCh. 8 - Which of the following statements about the C4...Ch. 8 - Prob. 7TYKCh. 8 - The oxygen released by photosynthesis comes from:...Ch. 8 - You bite into a spinach leaf. Which one of the...Ch. 8 - Animal metabolism and plant metabolism are related...Ch. 8 - Discuss Concepts Suppose a garden in your...Ch. 8 - Prob. 12TYKCh. 8 - Discuss Concepts Like other accessory pigments,...Ch. 8 - Prob. 14TYKCh. 8 - Prob. 15TYKCh. 8 - Prob. 16TYKCh. 8 - Photosynthesis directly opposes respiration in...Ch. 8 - Prob. 2ITDCh. 8 - Prob. 3ITDCh. 8 - Prob. 4ITD
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