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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Chapter 8, Problem 5TYK
Summary Introduction
Introduction:
Photosynthesis, in autotrophs (green plants), takes place in two phases- light-dependent and light-independent. The products formed during the daytime are utilized later in the night for the synthesis of carbohydrates. Thus, these products act as a connecting link between the two phases.
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The main purpose of the light-independent reactions is to ________.
a.
convert solar energy to chemical energy
b.
convert solar energy to ATP for short-term energy use
c.
build carbohydrates for long-term energy storage
Where did the energy to power the light-independent reactions come from?
A.
chlorophyll from photosystem
B.
FADH2FADH2 from the outer membrane
C.
NADH in mitochondria
D.
proton gradient across thylakoid
________ reactions of photosynthesis generate NADPH and ATP to carry solar energy.
a.
The light-independent
b.
The light-dependent
c.
Both the light-dependent and -independent
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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- Both temperature and light intensity can affect the rate of photosynthesis. However, in this study, the investigator kept the temperature constant and only studied how changes in light intensity affected the rate of photosynthesis, Which of the following best explains the investigator's decision to only study light intensity? Select one or more: a. It is easier to control light intensity than it is to regulate temperature, therefore the investigator chose to measure only light intensity b. Light intensity affects the rate of photosynthesis more than temperature, therefore the investigator chose to measure only light intensity c. none of the answers is correct d. If different light intensities and different temperatures had been studied at the same time, it would not be possible to know which of these factors affected the rate of photosynthesis.arrow_forwardPropose a hypothesis on how each of these variables affects the production of oxygen from a plant. 1. Increasing light intensity 2.Increasing CO2 levels 3.Increasing temperature 4.How does light intensity affect the rate of photosynthesis?arrow_forwardPredict 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 depletionarrow_forward
- Which of the following changes would decrease ATP production in the light-dependent reactions of photosynthesis? a. decreasing the pH of the thylakoid lumen b. decreasing the pH of the chloroplast stroma c. increasing the concentration of NADP+ in the chloroplast stroma d. making the thylakoid membrane freely permeable to protons by adding a proton channel e. two of the above would decrease ATP productionarrow_forwardThe function of light reactions is to a. obtain CO2. b. make carbohydrate. c. convert light energy into a usable form of chemical energy. d. regenerate RuBParrow_forwardWhich of the following is true of light-independent reactions of photosynthesis? Select all that apply. a. Light-independent reactions occur in the stroma. b. Water molecules are split during light-independent reactions. c. Chlorophyll absorbs energy from sunlight. d. Carbon dioxide is necessary for light-independent reactions.arrow_forward
- Which of the following is the major site of photosynthesis? a. apical meristem b. ground tissue c. xylem cells d. phloem cellsarrow_forwardIf you could measure pH within a chloroplast, where would it be lowest? a. In the stroma b. In the lumen of the thylakoid c. In the cytoplasm immediately outside the chloroplast d. In the antenna complexarrow_forwardThe purpose of the light-dependent reactions of photosynthesis is to - a split water to form oxygen b join glucose molecules to form starch c uses energy molecules like ATP d produce sugarsarrow_forward
- Which of the following statements is incorrect?a. Pigments absorb light of certain wavelengths only.b. Some accessory pigments are antioxidants.c. Chlorophyll is green because it absorbs green light.arrow_forwardWhen discussing why the rate of photosynthesis did not increase at higher light intensities, the investigator mentioned the possibility that high light intensities could damage chlorophyll, which would result in a decrease in oxygen production. Which of the following accurately explains the role of chlorophyll in oxygen production during photosynthesis and why damage to chlorophyll would results in lower oxygen production? Select one or more: a. Chlorophyll participates in carbon fixation during the Calvin Cycle. During this process, oxygen molecules are formed. b. Chlorophyll captures energy from sunlight and releases high energy electrons that enter the electron transport chain in the Calvin Cycle. During this process, oxygen molecules are formed. c. Chlorophyll participates in carbon fixation during the light reactions. During this process, oxygen molecules are formed. d. Chlorophyll captures energy from sunlight and releases high energy electrons that enter the electron…arrow_forwardWhat will likely happen to your plant if it will be placed in a dark area with no light? A.The plant will not be able to absorb sunlight B.No chlorophyll will be formed and the leaves will become whitish or pale yellow C.Plants will evolve to adapt in an environment with no light D.BothA and B E. BothA and Carrow_forward
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