The part of an antigen binding site on an antibody that binds antigen is the

A) idioblast.

B) idiotype.

C) epitope.

D) intron.


B) idiotype.

Biology & Microbiology

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Bacterial and eukaryotic cells primarily control gene expression at the level of transcription. If instead cells exerted control of gene expression primarily at the post-translational level, what would be different?

A) The ability to rapidly respond to environmental change would be reduced. B) Cells would expend significantly more energy. C) Genes would no longer be transcribed. D) Translation of mRNA into protein would not occur.

Biology & Microbiology

Where is the biomass pyramid upside-down?

a. among birds b. in forest habitats c. in tundra habitats d. in a pond or a sea e. in prairie habitats

Biology & Microbiology

The basic building block of a protein is called a(n)

What will be an ideal response?

Biology & Microbiology

_____________ are more closely related to whales than to _____________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology