Bacteria use restriction enzymes to:

A) synthesize DNA.
B) synthesize RNA.
C) synthesize protein.
D) destroy foreign protein.
E) destroy foreign DNA.


E) destroy foreign DNA.

Biology & Microbiology

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Genes abc and def have a high average cotransduction frequency. Genes abc and xyz have a very low average cotransduction frequency. What is the best explanation for this difference? 

A. The genes abc and def are much closer to each other on the chromosome. B. The genes abc and def must share a higher degree of sequence similarity. C. Both genes have a high affinity for the viral binding sites. D. Both genes code for gene products that are necessary for viral replication.

Biology & Microbiology

____ food chains tend to predominate in aquatic ecosystems

a. Higher trophic level b. Primary consumer c. Decomposing d. Grazing e. Detrital

Biology & Microbiology

Improving the balance between abdominal and back muscles is a primary means of preventing back pain.

a. true b. false

Biology & Microbiology

Which of the following converts FADH to FAD?

Biology & Microbiology