The technique by which DNA, RNA, or protein molecules are separated in a gel that is subjected to an electric field is
called ____.
a. PCR
b. biotechnology
c. amplification
d. a restriction enzyme digestion
e. gel electrophoresis
ANSWER: e
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Communicable diseases are most easily transmitted during the:
A) incubation period. B) period of convalescence. C) period of illness. D) prodromal period.
Rho-independent termination results in formation of a specialized structure that causes polymerase to stall. What is this structure called?
a. stable hairpin b. holoenzyme c. rho protein d. polyribosome
What is a reason for the open sea's ability to support few large animals? a. High productivity rates
b. Short food chains. c. Overfishing. d. The decline of conversion efficiency.
The primary structural molecule composing a cell membrane is a(n)
A. sugar molecule attached to a protein. B. phospholipid molecule. C. protein molecule. D. enzyme molecule. E. cholesterol molecule.