A protein that increases the rate of a chemical reaction is
A. a substrate.
B. a coenzyme.
C. an enzyme.
D. an inhibitor.
C. an enzyme.
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Gas exchange between the blood and interstitial fluid occurs via ____
a. diffusion b. active transport c. passive transport d. endocytosis e. pressure flow
Adaptations of the kangaroo rat to living in the dry,
hot environment of the southwestern United States include a. behavioral modifications that result in nocturnal activity patterns and daytime staying in burrows. b. a kidney that conserves body water better than that of humans. c. the ability to utilize water produced in the metabolism of carbohydrates. d. mechanisms that reduce evaporative water loss from the respiratory system. e. all of these.
What characteristic is shared between most prokaryotic and mitochondrial genomes?
A) <5 % protein-coding genes B) >20% interspersed repeats C) circular chromosomes D) linear chromosomes E) circular chromosomes with <5 % protein-coding genes
Please choose the answer that explains how the chemical leukocidin, produced by S. aureus, affects the host.
A) The skin begins to peel away from underlying tissues. B) The immune system is not able to make antibodies. C) It causes the production of boils all over the body. D) Inflammation and phagocytosis are severely compromised.