How do C4 and CAM plants survive under dry conditions?
What will be an ideal response?
C4 plants initially fix CO2 into in the mesophyll by an enzyme that does not catalyze O2 . That reaction releases CO2 in bundle sheath cells, where the Calvin-Benson cycle occurs. CAM plants' stomata open at night and take in CO2, which is fixed into a 4-carbon compound. During the day, this CO2 is released by this 4-carbon intermediate and is fixed for the second time when it enters the Calvin–Benson cycle.
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Why are polymerization reactions endergonic? Polymerization reactions _____
A) reduce entropy B) release heat, making the reactant monomers move faster C) release energy D) are at equilibrium
What percentage of the human genome actually codes for proteins?
A. 1.0% B. 2.5% C. 45.0% D. 97.5% E. 99.0%
What recognizes the nonsense codon and triggers termination at the end of translation?
a. tRNAs coded for termination b. small ribosomal subunit c. protein release factors d. large ribosomal subunit
In C4 plants, reactions that fix CO2 into four-carbon compounds occur in:
a. guard cells. b. epidermal cells. c. bundle sheath cells. d. mesophyll cells. e. xylem cells.