DNA polymerase begins DNA synthesis at the site of ____ hybridization
a. tracer
b. vector
c. plasmid
d. primer
e. enzyme
ANSWER: d
Biology & Microbiology
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A vaccine for the common cold is not feasible because
A. the surface antigens of rhinovirus mutate frequently. B. the cause is unknown. C. the rhinovirus cannot be grown in sufficient quantities. D. there are more than 100 types of rhinovirus.
Biology & Microbiology
The place where pollination occurs is the ____
a. stigma b. microspore c. anther d. receptacle e. style
Biology & Microbiology
Small effector molecules directly bind the DNA they regulate.
Answer the following statement true (T) or false (F)
Biology & Microbiology
The critical tissue for producing a vasodilatory effect of acetylcholine in Robert Furchgott's experiments with rabbit aortas was the
A. endothelium. B. smooth muscle layer. C. elastic outer layer. D. pericardium. E. one-way valves.
Biology & Microbiology