A fragment of DNA or RNA labeled with a tracer that can hybridize with a nucleotide sequence of interest is referred

to as a ____.



a. clone
b. plasmid
c. vector
d. marker
e. probe


ANSWER: e

Biology & Microbiology

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If mRNAs could be ligated and replicated within plasmids, what enzyme commonly used in recombinant DNA technology would no longer be needed?

A) restriction enzymes B) DNA polymerase C) RNA polymerase D) reverse transcriptase E) Taq polymerase

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In the autoimmune disease multiple sclerosis, a person’s immune system attacks and destroys

the myelin sheath cells. What occurs as a result of the destruction of these cells?

a. The speed of action potentials decreases. b. The sodium–potassium pumps malfunction. c. Signals cannot be transmitted across the synapse. d. Action potentials can travel in two directions

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Proteins perform four of the following functions. They do NOT, however ____

a. act as enzymes b. store large amounts of energy c. act as transport molecules d. bind molecules to or inside cells e. adjust cell activities

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A ramet is genetically identical to its original parent

Indicate whether the statement is true or false

Biology & Microbiology