Campbell Biology: Concepts & Connections, Books a la Carte Edition (8th Edition)
8th Edition
ISBN: 9780321946683
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Chapter 7, Problem 7TYK
Why is it difficult for C3 plants to carry out photosynthesis in very hot, dry environments such as deserts?
a. The light is too intense and destroys the pigment molecules.
b. The closing of stomata keeps CO2 from entering and O2 from leaving the plant.
c. They must rely on photorespiration to make ATP.
d. CO2 builds up in the leaves, blocking carbon fixation.
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Students have asked these similar questions
Some plants are able to survive in hot, dry climates like the desert. What is the name of their photosynthetic process?
A. Noncyclic photophsophorylation
B. C4 Photosynthesis
C. C3 Photosynthesis
D. Carbon fixation
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
Which is NOT an evolutionary adaptation of plants to minimize the costs of photorespiration while also conserving water on hot days?
a.
Use more ATP to incorporate CO2 into organic compounds, which increases CO2 concentration in the cell.
b.
Confine the Calvin cycle to specific cells in order to prevent inefficient rubisco binding and net energy loss.
c.
Binding O2 to rubisco instead of CO2.
d.
Uptake CO2 only at night and use ATP to fix it into organic acid for later use during the light reactions, which prevents water loss during the day.
Chapter 7 Solutions
Campbell Biology: Concepts & Connections, Books a la Carte Edition (8th Edition)
Ch. 7 - Complete this summary map of photosynthesis.Ch. 7 - In photosynthesis, __________ is oxidized and...Ch. 7 - Which of the following are produced by reactions...Ch. 7 - When light strikes chlorophyll molecules in the...Ch. 7 - The reactions of the Calvin cycle are not directly...Ch. 7 - Which of the following does not occur during the...Ch. 7 - Why is it difficult for C3 plants to carry out...Ch. 7 - How is photosynthesis similar in C4 plants and CAM...Ch. 7 - Compare and describe the roles of CO2 and H2O in...Ch. 7 - Explain why a poison that inhibits an enzyme of...
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- What two products result from photosynthesis? a. water and carbon dioxide b. water and oxygen c. glucose and oxygen d. glucose and carbon dioxidearrow_forwardWhich statement correctly describes carbon fixation? a. the conversion of CO2 to 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 CO2arrow_forwardIn C3 plants, _______ makes sugar production inefficient when stomata close on hot, dry days. a. photosynthesis c. photorespiration b. photolysis d. carbon fixationarrow_forward
- What is the energy of a photon first used to do in photosynthesis? a. split a water molecule b. energize an electron c. produce ATP d. synthesize glucosearrow_forwardFigure 8.6 On a hot, dry day, plants close their stomata to conserve water. What impact will this have on photosynthesis?arrow_forward• Which types of environments are better for C4 photosynthesis plants than for C3 photosynthesis plants?Describe how a high oxygen content in leaves can be toxic to plants.arrow_forward
- Using the graph comparing photosynthetic rate and absorption of different wavelengths of light, what can be concluded? a) The photosynthesis rate at 550 nm is the highest b) Chlorophyll a absorbs wavelengths at both ends of the spectrum c) Chlorophyll b is associated with the greatest rate of photosynthesis. d) Carotenoids absorb the narrowest range of wavelengths of lightarrow_forwardAs it relates to Photosynthesis: What would happen if all the plants died?arrow_forwardWhich process is most directly driven by light energy? A. ATP synthesis B. reduction of NADP+ molecules C. transfer of energy from pigment to pigment D. creation of a pH gradient by pumping protonsarrow_forward
- Why do desert plants that live in very hot and dry conditions have stomata? a. To allow for transpiration b. To allow for gas exchange c. To allow for the release of excess heat d. Both a and b are correct.arrow_forwardPhotosynthesis generally takes place in which parts of the plant? A. Leaf and other chloroplast bearing parts B. stem and leaf C. Roots and chloroplast bearing parts D. Bark and leafarrow_forwardIn which process is ATP produced in both photosynthesis and cellular respiration by ATP synthase, respectively? a. Krebs Cycle and Light-dependent reaction b. Light-dependent reaction and oxidative phosphorylation c. Glycolysis and Light-independent reaction d. Light-independent reaction and oxidative phosphorylationarrow_forward
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