Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 7, Problem 3MC
Summary Introduction
Introduction:
Photosynthesis is a process in which chloroplasts capture light energy from the sun and converts it into chemical energy of food. This energy is further used as food or stored as sugar in the plant. Chloroplasts are found primarily in the leaves.
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In a photosynthetic plant cell, chlorophyll is located:
a.
in the stroma
b. in the outer membrane of the chloroplast envelope
c. in the intervascular space of the chloroplast
d. in the inner membrane of the chloroplast envelope
e. in the thylakoids
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
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
Chapter 7 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 7.1 - What chemical reactions allow plants to capture...Ch. 7.1 - explain why photosynthesis is important?Ch. 7.1 - diagram the structure of leaves and chloroplasts...Ch. 7.1 - write out and explain the basic equation for...Ch. 7.1 - summarize the main events of the light reactions...Ch. 7.2 - What reactions allow plants to store the...Ch. 7.2 - list the light capturing molecules in chloroplasts...Ch. 7.2 - Prob. 1HYEWCh. 7.2 - You continuously monitor the photosynthetic oxygen...Ch. 7.2 - diagram and describe the molecules within the...
Ch. 7.2 - Prob. 3CYLCh. 7.3 - What global policy changes and what individual...Ch. 7.3 - describe the function of the Calvin cycle and...Ch. 7.3 - Why do C3 plants have an advantage over C4 plants...Ch. 7.3 - list the three stages of the Calvin cycle,...Ch. 7.3 - FIGURE E7-3 Corn prices have increased...Ch. 7.3 - describe the fate of the simple sugar G3P...Ch. 7 - Suppose an experiment is performed in which plant...Ch. 7 - Plant leaves contain pores called __________ that...Ch. 7 - Which of the following is True? a. Photosynthesis...Ch. 7 - Explain what would happen to life if...Ch. 7 - Prob. 2ACCh. 7 - Chlorophyll a captures wavelengths of light that...Ch. 7 - The Calvin cycle a. can only occur when light is...Ch. 7 - Prob. 2RQCh. 7 - Assume you want to add an accessory pigment to the...Ch. 7 - Prob. 3FIBCh. 7 - Prob. 3MCCh. 7 - Draw a simplified diagram of a leaf cross-section...Ch. 7 - Prob. 4FIBCh. 7 - Prob. 4MCCh. 7 - Draw a simplified diagram of a chloroplast and...Ch. 7 - Prob. 5FIBCh. 7 - Which of the following is False? a. Photosystem II...Ch. 7 - Prob. 5RQCh. 7 - Light reactions generate the energy-carrier...Ch. 7 - Prob. 6RQCh. 7 - Prob. 7RQ
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- 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 lowarrow_forwardWhat is the BEST explanation for why thylakoid membranes are flat and stacked? A. to fit more into a chloroplast B. to increase surface area for light absorption and cross- membrane traffic C. to increase the color of the leaf as camouflage from herbivores D. to hold more ATParrow_forwardplease use the image to answer A and B.a. which data represents the chloroplast? explain.b. which organelle is more at risk to changing concentrations of DNP? explain.arrow_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_forwardIf a plant is removed from its natural environment and exposed to 100 percent CO2 composed of the radioisotope 14C, which of the following will not occur? Select one: a. The rate of photorespiration will remain unchanged. b. The sugars synthesized by the plant will be radioactive. c. The oxygen released will also be radioactive. d. All the carbon molecules in the RuBP molecules will eventually become 14C. e. Rubisco will eventually contain 14C.arrow_forwardWhen considering the loading and unloading of photosynthate from the phloem, which of the following is FALSE? Select one: a. Apoplastic phloem unloading enables the import of sugars against their concentration gradient into sink tissue. b. In apoplastic loading, the solute potential of the companion cells is more negative than the apoplastic space nearby. c. In apoplastic loading, proton pumps create electrochemical gradients that can be used by symporter proteins to import sugars into the companion cell. d. All the statements are true. e. Symplastic loading relies on diffusion of the sugars through plasmodesmata from photosynthetic cells to the phloem cells.arrow_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_forwardPlant 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_forwardWhich of the following are found within chloroplasts? a. Stroma b. Thylakoid membrane c. Chlorophyll d. All of the abovearrow_forward
- This is the location of the carbon fixation reactions in C4 plants. Select one: a. the leaf's spongy mesophyll b. none of these answers c. the leaf's bundle sheath cells d. the palisade mesophyll e. the nearest apical meristemarrow_forwardDefine the following terms: a. photorespiration b. CA1P c. reductive pentose phosphate cycle d. phytochrome e. stomataarrow_forwardWhich part of the chloroplast MOST clearly uses modified surface-area-to-volume ratios to function efficiently? A. thylakoid B. outer membrane C. stroma D. ATP synthasearrow_forward
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