Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 29.5, Problem 1CC
A scientist adds a water-soluble inhibitor of photosynthesis to roots of a transpiring plant, but photosynthesis is not reduced. Why?
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A group of scientists wants to test the effect of different wavelengths of light on plant photosynthesis. They have 3 treatment groups: red light, green light, and no light. They choose red light because
chlorophyll has been shown to absorb red light. They choose green light because chlorophyll has been shown to reflect green light. They choose no light as a negative control to examine the rate of
photosynthesis in the absence of light. To measure photosynthetic rate, the scientists use sensors to measure oxygen production of plants exposed to the different light treatments.
Choose the best scientific hypothesis:
O Photosynthesis is a critical process for plants, and it is of great importance that we understand how it is impacted by different wavelengths of light.
O If rate of oxygen production is higher under red light than it is under green light or no light, it proves that red light has the largest effect on photosynthesis.
O Because chlorophyll absorbs red light, rate of oxygen…
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
Chapter 29 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 29.1 - Why is long-distance transport important for...Ch. 29.1 - Prob. 2CCCh. 29.1 - WHAT IF? Some plants can detect increased levels...Ch. 29.2 - If a plant cell immersed in distilled water has a...Ch. 29.2 - How would a reduction in the number of aquaporin...Ch. 29.2 - WHAT IF? What would happen if you put plant...Ch. 29.3 - Prob. 1CCCh. 29.3 - WHAT IF? If an element increases the growth rate...Ch. 29.3 - Prob. 3CCCh. 29.4 - Prob. 1CC
Ch. 29.4 - Prob. 2CCCh. 29.4 - Prob. 3CCCh. 29.5 - A scientist adds a water-soluble inhibitor of...Ch. 29.5 - WHAT IF? Suppose an Arabidopsis mutant lacking...Ch. 29.5 - Prob. 3CCCh. 29.6 - Prob. 1CCCh. 29.6 - WHAT IF? If you buy cut flowers, why might the...Ch. 29.6 - Prob. 3CCCh. 29.7 - Prob. 1CCCh. 29.7 - Prob. 2CCCh. 29.7 - Prob. 3CCCh. 29 - Which structure or compartment is part of the...Ch. 29 - Prob. 2TYUCh. 29 - Prob. 3TYUCh. 29 - What would enhance water uptake by a plant cell?...Ch. 29 - Prob. 5TYUCh. 29 - Compared with a cell with few aquaporin proteins...Ch. 29 - Two groups of tomatoes were grown in the...Ch. 29 - Prob. 8TYUCh. 29 - Prob. 9TYUCh. 29 - SCIENTIFIC INQUIRY A Minnesota gardener notes that...Ch. 29 - Prob. 11TYUCh. 29 - FOCUS ON INTERACTIONS The soil in which plants...Ch. 29 - Prob. 13TYU
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- What colors (of the electromagnetic spectrum) are absorbed by plants? What would happen to photosynthesis if the green light waves that reach a plant were blocked?arrow_forwardFor the Photosynthesis procedure, you will be detecting if photosynthesis occurs in Elodea plants exposed to light vs kept in the dark. Do you think the Elodia kept in the dark will be able to undergo the light reaction of photosynthesis? How will you be able to tell if the elodea has or has not undergone photosynthesis?arrow_forwardDespite the enormous amount of solar energy that plants are exposed to, photosynthesis is only able to transform about 1% to2% of that energy into stored chemical energy. Explain 1 factor responsible for this phenomenon and detail how it contributes to this inefficiency.arrow_forward
- If I wanted to maximize the rate of photosynthesis in plants, should I expose them on Low Light or moderate?arrow_forwardHow would you design an experiment to test the following hypothesis: " The optimal temperature for photosynthesis in spinach leaves is 20 degrees Celsius?"arrow_forwardWhat is the benefit of Photorespiration in plants and what problem does it pose in many plants?arrow_forward
- Students are preforming an experiment to study the role of light in photosynthesis. They place an Elodea plant into a large test tube with water and assemble a volumeter using a cork and calibrated glass tubing. Then, the apparatus is placed near a lamp. Soon after, the water level in the tubing begins to move upward. Why does the edge of the water move upward?arrow_forwardWhich of the following statements is FALSE? Group of answer choices: - Plastoquinone has a higher reduction potential than plastocyanin. - Water is the ultimate electron donor. - Proton gradient is created in the light phase of photosynthesis wherein the pH in the stroma is higher than in the lumen. - Photosystem II has chlorophylls in its reaction center that has maximum light absorption at 680 nm.arrow_forwardusing a 14CO2 fixation assimilation method,a plant is found to be fixing carbon at a rate of 140mgh-1 .dm-2 leaf area in the sunlight. In darkness the same plant is losing 30mgh-1.dm-2 . Calculate the photosynthetic capacity of the plant and state with reasons to which photosynthetic type the plant belongsarrow_forward
- Which of the following is TRUE about CAM photosynthetic pathway? Compared to the C3 and C4 pathways, CAM photosynthesis results in greater transpiration and water loss. O By separating where carbon is initially fixed inside the leaf tissue, CAM plants can better control the gradient of carbon dioxide between the air and their leaves. CAM photosynthesis is more energy efficient than C3 photosynthesis. Compared to C3 and C4 photosynthetic pathways, the rate of CAM photosynthesis is limited.arrow_forwardWhich 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_forwardDespite CAM photosynthesis having a comparatively higher water use efficiency relative to C3 and C4 plants, its distribution is restricted primarily to desert succulents. In terms of water use efficiency, explain why CAM photosynthesis has not spread more widely.arrow_forward
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