BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
2020th Edition
ISBN: 9780135686553
Author: Audesirk
Publisher: PEARSON
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Chapter 7, Problem 3MC
Summary Introduction
Introduction:
Plant foliage is comprised of leaves. These structures are plant organs or appendages that actively participate in harvesting energy from the sun to manufacture glucose and oxygen gas, in other words, photosynthesize.
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If 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 complex
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 production
Why do land plants have stomates (sometimes called stomata)?
a. To allow plants to take in carbon dioxide from the atmosphere.
b. All of the choices are true; none are false.
c. To control water loss while allowing for the uptake of some raw materials of photosynthesis.
d. They allow the plant to have some control over transpiration rates.
Chapter 7 Solutions
BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
Ch. 7 - Which of the following is True? a. Photosynthesis...Ch. 7 - The Calvin cycle a. can only occur when light is...Ch. 7 - Prob. 3MCCh. 7 - Carotenoids a. include chlorophylls a and b. b....Ch. 7 - Prob. 5MCCh. 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 - 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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- Photosynthesis generally takes place in which parts of the plant? A. Leaf and other chloroplast bearing parts B. stem and leaf C. Roots and chloroplast bearing parts D. Bark and leafarrow_forwarda.) Are there chloroplast in guard cells? b.) How do the guard cells function? c.) What photosynthetic reaction occur in chloroplast?arrow_forwardWhere is chlorophyll located in the chloroplast? (a) thylakoid membranes (b) stroma (c) matrix (d) thylakoid lumen (e) between the inner and outer membranesarrow_forward
- Which of the following is NOT true about the structure of chloroplasts? A) The thlakoid membranes are continuous with the intermembrane space B) The network of thylakoids within a chloroplast are one continuous space C)Thylakoids of the chloroplast developed due to the invagination of the inner plastid membrane D) All of these are true about chloroplast structure. E) Chloroplasts are considerably larger than mitochondriaarrow_forwardClosed stomata ________. a. limit gas exchange c. prevent photosynthesis b. permit water loss d. absorb lightarrow_forwardWhich of the following is the major site of photosynthesis? a. apical meristem b. ground tissue c. xylem cells d. phloem cellsarrow_forward
- Using the graph comparing photosynthetic rate and absorption of different wavelengths of light, what can be concluded? a) The photosynthesis rate at 550 nm is the highest b) Chlorophyll a absorbs wavelengths at both ends of the spectrum c) Chlorophyll b is associated with the greatest rate of photosynthesis. d) Carotenoids absorb the narrowest range of wavelengths of lightarrow_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_forwardPhotorespiration 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.arrow_forward
- In the light-dependent reactions, what accumulates in the thylakoid compartment of chloroplasts? a. sugars c. O2 b. hydrogen ions d. CO2arrow_forwardIf a leaf disc is exposed to light but not to CO2, why would it not produce enough O2 to float?arrow_forwardMany scientists are concerned because CO2 levels in the atmosphere appear to be increasing. If this happens, how do you think plants and the atmosphere will affect each other? Make sure you include both respiration and photosynthesis in your answer.arrow_forward
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