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2. By what process does the carbon dioxide in the phenol red move into the plant exposed to light?

2. By what process does the carbon dioxide in the phenol red move into the plant exposed to light?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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2. By what process does the carbon dioxide in the phenol red move into the plant exposed to light? 3. During which photosynthetic process does the plant in the light use the CO₂ that it removed from the phenol red solution? F. LOCATION OF STORED SUGARS (STARCH) IN VARIEGATED LEAVES Variegated leaves are leaves whose pigments are not evenly distributed in all cells. The cells of portions of the leaf which appear clear or white have no photosynthetic pigments. Those cells in the colored portions of the leaf contain chlorophyll and one or more of the accessory pigments. These pigmented cells are the site of photosyn- thesis in variegated leaves. a. Recall that some of the sugars produced in photosynthesis are stored as starch. Using the technique of leaf clearing and selective staining, you will determine whether starch is stored in the pigmented or non-pigmented portions of a variegated leaf. Procedure Your instructor will clear a leaf by boiling it in ethanol to remove the pigments. After the leaf is placed in iodine, you will see a color change in regions where starch is stored. Compare a fresh leaf with a leaf having the same variegation pattern which has been cleared and stained. Answer the questions below. b. Questions 1. How does the location of starch compare with the pattern of variegation? N troll the Thin Joptre leaf.
Transcribed Image Text:2. By what process does the carbon dioxide in the phenol red move into the plant exposed to light? 3. During which photosynthetic process does the plant in the light use the CO₂ that it removed from the phenol red solution? F. LOCATION OF STORED SUGARS (STARCH) IN VARIEGATED LEAVES Variegated leaves are leaves whose pigments are not evenly distributed in all cells. The cells of portions of the leaf which appear clear or white have no photosynthetic pigments. Those cells in the colored portions of the leaf contain chlorophyll and one or more of the accessory pigments. These pigmented cells are the site of photosyn- thesis in variegated leaves. a. Recall that some of the sugars produced in photosynthesis are stored as starch. Using the technique of leaf clearing and selective staining, you will determine whether starch is stored in the pigmented or non-pigmented portions of a variegated leaf. Procedure Your instructor will clear a leaf by boiling it in ethanol to remove the pigments. After the leaf is placed in iodine, you will see a color change in regions where starch is stored. Compare a fresh leaf with a leaf having the same variegation pattern which has been cleared and stained. Answer the questions below. b. Questions 1. How does the location of starch compare with the pattern of variegation? N troll the Thin Joptre leaf.
2. Explain why starch is missing from some portions of the variegated leaf.
Transcribed Image Text:2. Explain why starch is missing from some portions of the variegated leaf.
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