Which mutation(s) may not result in an amino acid change in the protein product?
a. deletion and insertion
b. deletion and substitution
c. insertion and substitution
d. substitution only
e. insertion only
ANSWER: d
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Large or polar hormones cannot enter a cell directly. Which of the following molecules can act as a second messenger for such hormones?
A. catecholamine B. cyclic AMP C. epinephrine D. norepinephrine E. calcitonin
About 50% of the world's commercial fish supply comes from areas of:
a. deep submarine canyons. b. atolls. c. benthic outer-edge of the continental shelf. d. upwelling. e. mid-ocean ridges.
Which of the following statements about
complement proteins is false? a. flag antigens for destruction b. can destroy pathogens directly c. enhance lymphocyte response d. exclusively bacterial DNA associated e. none of these are correct
What does a karyotype reveal about chromosomes found in actively dividing cells?
What will be an ideal response?