Which antibody may help activate helper T cells?

a. IgA
b. IgD
c. IgE
d. IgG
e. IgM


B

Biology & Microbiology

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The damage caused by parasites may be due to

A. competition for nutrients. B. the physical blocking of organs. C. the direct digestion of host tissue. D. the host's immune response. E. All of the choices are correct.

Biology & Microbiology

The constant region of a light chain is indicated by number

a. 1. b. 2. c. 3. d. 4. e. 5.

Biology & Microbiology

The 9:6:1 ratio seen in the dihybrid cross of summer squash indicates what genetic relationship between the two genes controlling fruit shape?

A) recessive interaction B) dominant interaction C) recessive epistasis D) dominant epistasis E) dominant suppression

Biology & Microbiology

Acetylcholine is an amino acid.

a. true b. false

Biology & Microbiology