The functional differences, as well as differences in three-dimensional structures, between two different enzymes from E. coli result directly from their different:
A) affinities for ATP.
B) amino acid sequences.
C) roles in DNA metabolism.
D) roles in the metabolism of E. coli.
E) secondary structures.
Answer: B) amino acid sequences.
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All of the following are directly used as alternative substrates for glycolysis except
A) galactose. B) mannose. C) ribose. D) fructose. E) both choices A and C
When the birth rate plus immigration equals the
death rate plus emigration the result is a. logistic growth. b. exponential growth. c. population saturation. d. zero population growth. e. geometric growth.
Degranulation of mast cells leads to
A. lymph node swelling. B. constricted bronchioles. C. constriction of blood vessels. D. decreased mucus production.
During translation, which one of the following is required for translocation of the ribosome along the mRNA?
a. tRNA synthetase b. a translation initiation factor c. translation elongation factor EF-Tu d. translation elongation factor EF-G