The cap on an mRNA transcript is the site where ____
a. ribosomes attach at the start of translation
b. the start codon is located
c. translation is terminated
d. the stop codon is covered until needed
e. the mRNA is protected from attack by RNA-digesting enzymes.
ANSWER: a
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In class switching in the secondary antibody response, the most common antibody switch is from
A) IgA to IgD. B) IgD to IgE. C) IgM to IgG. D) None of the answers are correct.
The Hardy-Weinberg equation stats that p2 + 2pq + q2 = 1; the genotype frequency of heterozygotes is represented by
A. p2 B. 2pq C. q2 D. p2 +q2 E. p2 + 2pq
After an action potential is triggered, the rapid increase in membrane potential can be attributed to
A. the closing of sodium leak channels. B. the direction reversal of the sodium/potassium pump. C. the opening of the voltage-gated potassium channels. D. the closing of potassium leak channels. E. the opening of voltage-gated sodium channels.
What kinds of general observations cause one to conclude that development is the result of variable gene activity?
What will be an ideal response?