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Unformatted text preview: a. latent heat loss from the leaf. b. sensible heat loss from the leaf. c. infrared heat loss from the leaf. d. absorption of solar radiation by the leaf. 5. In order to utilize the “raffinose trap” in phloem loading, symplastic loaders a. convert sucrose to raffinose in the leaf mesophyll. b. use ATPase to load raffinose into the companion cell. c. convert sucrose into raffinose in the companion cell or sieve-tube member. d. load raffinose into the mesophyll apoplast, and convert it into sucrose before loading into the companion cell. 6. P-protein in sieve-tube members serves as a a. short-term plug of sieve plates immediately following phloem injury. b. permanent plug of sieve plates following phloem injury. c. regulator of apoplastic phloem loading. d. regulator of symplastic phloem loading....
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This note was uploaded on 02/19/2010 for the course CHEMISTRY 343 taught by Professor Clauss during the Spring '10 term at Wisconsin.
- Spring '10
- Organic chemistry