How many nucleotides comprise one codon?

a. 2
b. 3
c. 5
d. 6
e. 16


ANSWER: b

Biology & Microbiology

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Membrane rafts are found in the cytoplasmic membranes of

A) archaea only. B) bacteria only. C) eukaryotes only. D) both archaea and bacteria. E) both archaea and eukaryotes.

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Which type of transmembrane protein is directly responsible for maintaining the propagation of action potentials across an axon once it has been initiated?

A) Sodium-potassium pumps B) Voltage-gated potassium channels C) Voltage-gated sodium channels D) Voltage-gated calcium channels E) Ligand-gated ion channels

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Chronic constipation can lead to enlargement of blood vessels of the anus known as

What will be an ideal response?

Biology & Microbiology

Cells are always producing proteins from every gene they possess.

a. true b. false

Biology & Microbiology