Proteins that speed up reactions are known as
a. salts.
b. buffers.
c. monomers.
d. polymers.
e. enzymes.
E
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Tropical climates are warmer than temperate climates because
A. temperate climates have more mountains and thus more snow causing the landmasses to warm slower. B. tropical climates have more vegetation and thus can absorb more heat. C. temperate climates are closer to the poles and the polar surfaces cause a reduction in heat gain. D. tropical climates receive the sun's rays at an almost perpendicular angle; since Earth is a sphere, the temperate climates receive the sun's rays at a much steeper incidence thus spreading the radiation over a broader area. E. tropical climates receive the sun's rays at a much steeper incidence thus spreading the radiation over a broader area and causing the tropics to be warmer while the temperate climates receive the sun's rays at an almost perpendicular angle, which causes some areas to be warm and other areas to be cold.
Which of the following catalyzes the unwinding of the DNA double helix during DNA replication?
a. topoisomerase b. primase c. DNA polymerase d. helicase e. DNA ligase
A typical sponge is best described as a
A) slow-moving suspension feeder with a true coelom. B) sessile suspension feeder with bilateral symmetry. C) slow-moving carnivore with no true tissues or symmetry. D) sessile suspension feeder with no true tissues or body symmetry.
Which of the following is mismatched?
A. Gracilicutes - gram-negative cell walls B. Firmicutes - gram-positive cell walls C. Tenericutes - waxy acid fast cell walls D. Mendosicutes - archaea cell walls E. None of the choices is correct.