Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 7, Problem 5RQ
Explain photorespiration and why it occurs. Describe the two mechanisms that some groups of plants have evolved to reduce photorespiration.
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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 Readir
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
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 Readin
Discuss other morphological differences between sunny and shady set-ups of mung bean in relation to phototropic response of plants.
Characteristics
sunny
shaded
Leaf color
Lime Green
Pale Green
Direction of Growth
Grows upward towards the direction of sunlight
Oriented in the direction of the light but growth is bent downward
Chapter 7 Solutions
Biology: Life on Earth
Ch. 7 - Plant leaves contain pores called _____ that allow...Ch. 7 - Chlorophyll a captures wavelengths of light that...Ch. 7 - 3. During the first stage of photosynthesis, light...Ch. 7 - The oxygen produced as a by-product of...Ch. 7 - 5. In plants, the enzyme that catalyzes carbon...Ch. 7 - Light reactions generate the energy-carrier...Ch. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - 3. Draw a simplified diagram of a leaf...Ch. 7 -
4. Draw a simplified diagram of a chloroplast and...
Ch. 7 - Explain photorespiration and why it occurs....Ch. 7 - Trace the flow of energy in chloroplasts from...Ch. 7 - 7. Summarize the events of the Calvin cycle. Where...Ch. 7 - Suppose an experiment is performed in which plant...Ch. 7 - You continuously monitor the photosynthetic oxygen...Ch. 7 - If you were to measure the pH in the space...Ch. 7 - 3. Assume you want to add an accessory pigment to...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the benefit of Photorespiration in plants and what problem does it pose in many plants?arrow_forwardDescribe the process of development of root nodules in leguminous plant. Name the oxygen scavenger molecule present in root nodules?arrow_forwardList the three events that occur during the process of photosynthesis. Explain the role of stomata in this process.arrow_forward
- discussmorphological differences between sunny and shady setups of mung beans in relation to phototropic response of plantsarrow_forwardA) The concentration of CO2 is lower inside a plant cell than in the atmosphere (outside the cell). In your own words, describe how the CO2 levels are kept low inside the plant cell and explain why this is necessary. Assume stomata are open. B) Regarding the situation presented in Part A and assuming that the stomata of the plant leaves are closed, would this favour the induction of photorespiration in a C3 plant? Explain. Make reference to relevant molecule or molecules as needed. Please clearly label your responses as A and Barrow_forwardName the predominant chlorophyll molecules in green plants.arrow_forward
- 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, and 3) how it has adapted itself to minimize photorespiration. 4arrow_forwardUnder 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?arrow_forwardPlants 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_forward
- Which of the following scenarios happens during the light-dependent reaction of photosynthesis? Oxygen gas is produced in the thylakoid lumen by the oxidation of water by photosystem I. Ferrodoxin and NADP+ reductase participates in the reduction of NADP+ to NADPH. Carbon dioxide enters the plants via stomata. Rubisco attaches three molecules of ribulose bisphosphate (RuBP) to one molecule of carbon dioxide.arrow_forwardWhat special adaptation has evolved in CAM plants such as cacti and stonecrops that allows CO2 fixation and the Calvin cycle to occur in the same cell, but still occur separately? Briefly describe how this separation of events works.arrow_forwardPhotosynthesis can be impacted by shifts in environmental conditions, most notably by high light intensity and/or arid conditions. Plants employ a number of strategies to deal with this. List two viable ALTERNATE pathways/mechanisms for photosynthesis (beyond the traditional pathway) and the advantages/disadvantages of each.arrow_forward
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