A long poly-A-tail is necessary to initiate translation. Which protein binds directly to eIF4E to inhibit translation initiation?
A) PARN
B) poly-A polymerase
C) PABP
D) CPEB
E) maskin
Answer: E
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The breakdown of glucose to carbon dioxide and water is an
A. exergonic reaction in photosynthesis. B. endergonic or exergonic reaction, depending on the step. C. endergonic reaction in photosynthesis. D. exergonic reaction in cellular respiration. E. ndergonic reaction in cellular respiration.
Which of the following flower structures are
incorrectly paired?
a. filament-anther b. style-ovary c. receptacle-flower d. all of these are correctly paired e. none of these are correctly paired
Map units on a linkage map cannot be relied upon to calculate physical distances on a chromosome because
A) the frequency of crossing over varies along the length of the chromosome. B) the relationship between recombination frequency and map units is different in every individual. C) physical distances between genes change during the course of the cell cycle. D) the gene order on the chromosomes is slightly different in every individual. E) all of the above
During photosynthesis, which step is most responsible for a plant's acquisition of new organic material?
a) the "building" of NADPH during the Calvin cycle b) the excitation of chlorophyll molecules by photons of light c) the "plucking" of carbon atoms from the air and fixing of the carbons to the organic molecules within the chloroplast d) the loss of water through evaporation e) ATP made during the light reactions