The products of genes that are switched on in
specific tissues at specific stages of
development affect mainly
a. gene replication.
b. gene transcription.
c. mRNA transcript processing.
d. translation.
e. post-translational processing of proteins
B
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The ____ regulates the movement of molecules in and out of the cell
a. nucleus b. cytoplasm c. cystol d. plasma membrane e. DNA
Specific proteins can be localized in the transmission electron microscope by use of
a. positive staining. b. negative staining. c. gold-labeled antibodies. d. shadowing with specific metals.
If an amine group added to a precursor comes from a preexisting amino acid, the process is called
a) beta-oxidation. b) amination. c) transamination. d) beta-reduction.
A keystone species affects its community by ____.
A. maintaining food web interactions or modifying the habitat B. controlling the prey species C. decreasing the number of prey species in a community D. preying upon a wide variety of organisms in the community E. feeding on only one type of organisms in the community