In the control of translation initiation, the 5' UTR of mRNA is the site for binding by the protein:
A. PABP.
B. CBEB.
C. CPSF.
D. eIF4E.
D
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Which of the following is not needed for DNA replication?
A. ribosomes B. DNA C. nucleotides D. enzymes E. None of these are needed.
A nonsense mutation:
A: results in a protein that is truncated from the N-terminal end. B: would likely not affect the activity of a protein. C: would not affect the primary structure of a protein. D: must result from a shorter mRNA transcript of the gene. E: is a result of a change in a codon for an amino acid in a protein to a stop codon.
An E. coli culture that has been growing at 37°C is moved to 25°C. Which of the following changes must be made in its plasma membrane?
a. The number of phosphate groups must increase. b. The viscosity must increase. c. The number of saturated chains must increase. d. The number of unsaturated chains must increase. e. No changes are necessary
The movement of substances from the blood into the proximal tubule is known as ____.
Fill in the blank(s) with the appropriate word(s).