In which one of the following cellular processes is RNA involved?

A. transcription
B. translation
C. DNA replication
D. transcription and translation
E. All of these choices are correct.


Answer E

Biology & Microbiology

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When macrophages bind to an antigen they

secrete cytokines. Cytokines act as

a. antibodies. b. phagocytes. c. signaling molecules. d. enzymes. e. antigens

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Which of the following is not a common component of circulating blood?

a) blood plasma b) formed elements c) proerythrocytes d) platelets e) leukocytes

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Certain complement proteins kill foreign microbes by

A. inactivating their ribosomes. B. destroying their nucleic acids. C. creating interferon. D. causing them to burst. E. agglutinating them.

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Any substance that can cause an immune response is a/an:

A) microbe. B) nonspecific defense. C) antigen. D) interferon. E) antibody.

Biology & Microbiology