A protein that is converted to an active enzyme is a
A. codon.
B. proenzyme.
C. gene.
D. pre-mRNA.
E. ribosomal RNA (rRNA).
B
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An excitatory neurotransmitter _____ the postsynaptic membrane
a) depolarizes b) repolarizes c) hyperpolarizes d) does not affect the polarity of e) moves across channels in
What is the area where marrow is located?
A. Growth plate B. Sharpey fibers C. Medullary cavity D. Endosteum E. Periosteum
Which of the following correctly describes myoglobin's special function in muscle tissue?
A. Acts as a reservoir for O2 B. Synthesizes ATP C. Breaks down glycogen D. Produces action potentials E. Stores glucose
An embryonic cell that contains the potential to give rise to any tissue type is called a/an
A. differentiated cell. B. multipotent cell. C. pluripotent cell. D. omnipotent cell. E. totipotent cell.