The principle that energy cannot be created or destroyed is known as ________
A) cellular respiration
B) conservation of energy
C) conservation of heat
D) entropy
B
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A retrovirus produces an enzyme, called reverse transcriptase, which copies its RNA genome into DNA. This is opposite of the central dogma because
A) a virus is not an organism. B) a virus lacks genetic material. C) the central dogma states that RNA is copied into DNA. D) the central dogma states that DNA is copied into RNA.
Action potential begins when which of the following occurs?
A) The inside of the neuron becomes more negative relative to the outside. B) Sodium channels open sequentially. C) The membrane becomes depolarized. D) Potassium ions diffuse to allow repolarization of the cell.
The tertiary structure and function of a polypeptide is principally determined by the
(A) length of the polypeptide (B) number of nucleotides present in the polypeptide (C) repeated units of glycerol making up the polypeptide (D) interactions between amino acids present in the polypeptide
An atom that contains 8 electrons in its outermost energy level is said to be
A. inert. B. reactive. C. a cation. D. a molecule.