BIOLOGY
5th Edition
ISBN: 9781264104680
Author: BROOKER
Publisher: MCG
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Chapter 8, Problem 8TY
Summary Introduction
Introduction:
The C3 plants perform photorespiration when the concentration of carbon dioxide is low and oxygen is high. Photorespiration takes place due to the residual affinity of Rubisco for oxygen. The enzyme assimilates CO2 in C3 plants.
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Which of the following statements is/are FALSE for CAM plants?
a.The dark reaction uses less ATP and NADPH than other plants.
b.Succulents and tropical plants growing under semi-arid condition.
c.C4 pathway occurs at night and C3 pathway occurs at daytime.
d.Scotoactive stomata are open during daytime but close at nighttime.
Which of the following descriptions about C4 and CAM plants is not correct?
Select one:
a. CAM plants use CO2 released from organic compounds during the day
b. C4 and CAM plants both close stomata during the day in hot and dry climates.
c. in C4 plants, PEP carboxylase present in bundle-sheath cells incorporate CO2 into C4 compounds
d. CAM plants fix CO2 at night
e. C4 plants use PEP carboxylase to fix CO2 even when CO2 concentrations are low
Photorespiration becomes more likely when a. CO2 concentrations are high in leaf cells. b. stomata remain closed in C3 plants. c. glucose concentrations are low in leaf cells. d. ATP binds to rubisco.
Chapter 8 Solutions
BIOLOGY
Ch. 8.1 - Core Skill: Modeling The goal of this modeling...Ch. 8.1 - Prob. 2CSCh. 8.1 - Can the Calvin cycle occur in the dark?Ch. 8.2 - Prob. 1CCCh. 8.2 - Prob. 2CCCh. 8.2 - Prob. 3CCCh. 8.2 - Prob. 4CCCh. 8.2 - Why does cyclic photophosphorylation provide an...Ch. 8.2 - Prob. 6CCCh. 8.3 - Prob. 1CC
Ch. 8.4 - Prob. 1CCCh. 8.4 - Prob. 1EQCh. 8.4 - Prob. 2EQCh. 8.4 - Prob. 3EQCh. 8.5 - Prob. 1CCCh. 8.5 - Prob. 2CCCh. 8 - The water necessary for photosynthesis a. is split...Ch. 8 - In PSII, P68o differs from the pigment molecules...Ch. 8 - Prob. 3TYCh. 8 - Prob. 4TYCh. 8 - Prob. 5TYCh. 8 - Prob. 6TYCh. 8 - Prob. 7TYCh. 8 - Prob. 8TYCh. 8 - Prob. 9TYCh. 8 - Prob. 10TYCh. 8 - Prob. 1CQCh. 8 - Prob. 2CQCh. 8 - Prob. 3CQCh. 8 - Discuss the advantages and disadvantages of being...Ch. 8 - Biotechnologists are trying to genetically modify...
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- Plant is autotroph which means it can make its own nutrients by photosynthesis. a. Define photosynthesis. b. Photosynthesis takes place in the mesophyll cells. Name the cells, then complete the table below. Cell Name Shape and Arrangement Function c. Other than from photosynthesis, plant can get nutrients from the soil. Name 4 minerals that the plant gets from the soil, then state the functions. d. With reference to diffusion, osmosis, and active transport, explain how the root hair cell absorbs water and mineral ions from the soil. Water... Mineral ions..arrow_forwardPlants obtain water and nutrients from the soil.a. What structure in a plant uses water in a metabolic reaction? What is this metabolic process called? b. Describe in detail two mechanisms by which water can move from the roots to this location c. If a plant was exposed to saltwater, how would it affect the above processes? Be specific, including a discussion of water potential d. How do plants absorb minerals from the soil? Does this process require energy?arrow_forwardW 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.arrow_forward
- In hot, dry climates, plants have evolved mechanisms to avoid photorespiration. Which of the following is FALSE Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d e C3 plants have no mechanism to avoid photorespiration C4 plants reduce photorespiration by separating the light reaction in the mesophyll cells from the light- independent reaction in the bundle-sheath cells CAM plants minimize photorespiration by collecting and storing CO2 at night and keeping their stomata closed during the day C4 plants include corn, sugarcane, and many grasses CAM plants can undergo photophosphorylation in the absence of sunlight Open in Readirarrow_forwardThe figure below shows the concentration of glucose for a 24-hour period on both the process of photosynthesis (blue) and cellular respiration (red dashed lines). What explains the increase of respiration rate during the day? a. Enzymes are active during the day. b. Glucose production has increased due to photosynthesis. c. More energy is required to transport water and phloem sap and to dissipate heat. d. All of the above.arrow_forwardWhich is NOT produced during the light-dependent reactions A. ATP B. Oxygen C. NADPH D. Sugararrow_forward
- Which molecule conveys protons from the chloroplast stroma into the thylakoid lumen? a. cytochrome b6-f b. plastocyanin c. phytochrome d. cytochrome c e. oxygenarrow_forwardIn hot, dry climates, plants have evolved mechanisms to avoid photorespiration. Which of the following is FALSE Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d C3 plants have no mechanism to avoid photorespiration C4 plants reduce photorespiration by separating the light reaction in the mesophyll cells from the light- independent reaction in the bundle-sheath cells CAM plants minimize photorespiration by collecting and storing CO2 at night and keeping their stomata closed during the day C4 plants include corn, sugarcane, and many grasses CAM plants can undergo photophosphorylation in the absence of sunlight 7 Open in Readinarrow_forwardWhich of the following statements is/are FALSE? a.NADPH is formed in the stroma. b.The cyclic electron transport involves PSII only. c.pH gradient can be formed from the splitting of H2O. d.In the pH gradient, stroma is acidic and thylakoid space is basic.arrow_forward
- The use of the C4 pathway for initial carbon fixation (CO2 into a 4C compound) I. occurs only in plants with specialized leaf anatomy containing bundle sheath cells surrounded by a ring of mesophyll cells II. occurs during the day in CAM plants III. reduces the problems of photorespiration by isolating the enzyme PEP carboxylase from high levels of dissolved O2arrow_forwardThe use of the C4 pathway for initial carbon fixation (CO2 into a 4C compound) I. occurs only in plants with specialized leaf anatomy containing bundle sheath cells surrounded by a ring of mesophyll cells II. occurs during the day in CAM plants III. reduces the problems of photorespiration by isolating the enzyme PEP carboxylase from high levels of dissolved O2 Select one: a. Only III is true b. Only I and III are true c. Only I is true d. Only I and II are true e. I, II and III are truearrow_forwardTerrestrial plants have stomata on the surface of their leaves. Stomata are surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma. Which of the following best explains how the structure of the leaf is used in processes that occur in plants? A. Water enters the plant through the surface of the leaf for transpiration B. Gases for photosynthesis are exchanged through the surface of the leaf. C. Energy for cellular reproduction is absorbed through the surface of the leaf. D. Carbon dioxide enters the plant through the surface of the leaf for cellular reproduction.arrow_forward
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Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY