The cell line HeLa was isolated from a
a. chimpanzee.
b. rat.
c. human.
d. guinea pig.
e. dog.
C
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Which one of the following characteristics do animals, fungi, and protozoa have in common?
A) They obtain their carbon from carbon dioxide. B) They obtain their carbon from inorganic compounds. C) They obtain their energy and carbon atoms from chemicals. D) They obtain their energy from light.
A checkpoint protein that functions during S stage would likely ____.
A molecule that binds to an enzyme at a location other than the active site and thereby alters the enzyme's shape, making it inactive or less active is a(n) ________ inhibitor.
Fill in the blank(s) with the appropriate word(s).
What does myoglobin supply for muscle
activity?
a. oxygen for aerobic respiration b. phosphate for ATP formation c. direct energy for white muscle fiber contraction d. glucose for lactate fermentation e. more than one of these