The hormone ____ is involved in a positive feedback cycle that results in strong uterine contractions during labor
a. estrogen
b. oxytocin
c. cortisol
d. progesterone
e. prolactin
ANSWER: b
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In order to synthesize proteins, a virus with a genome comprised of single-stranded negative-sense RNA
A. must use its negative-sense strand as a template to make a positive-sense RNA. B. must use DNA polymerase to make a positive-sense DNA strand first. C. must use reverse transcriptase to make a negative-sense DNA strand first. D. can directly translate its negative-sense RNA strand into proteins.
The short structures indicated by “A” in the figure
illustrating a step in PCR are a. template DNAs. b DNA polymerases. c. primers. d. RFLPs. e. restriction enzymes.
Catabolism: Lecture summary
What will be an ideal response?
The phagocyte that kills about 20 bacteria before dying is the ____
a. eosinophils b. macrophage c. neutrophils d. dendritic cell e. basophils