Several different classes of enzymes are needed for the catabolism of carbohydrates. Which of the following descriptions best matches the function of an isomerase?
(a) An enzyme that catalyzes the rearrangement of bonds within a single molecule.
(b) An enzyme that catalyzes a change in the position of a specific chemical group within a single molecule.
(c) An enzyme that catalyzes the oxidation of a molecule by removing a hydride ion.
(d) An enzyme that catalyzes the addition of phosphate groups to other molecules.
(a)
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An epitope is _____
A) part of the interferons that penetrate foreign cells B) a protein protruding from the surface of B cells C) two structurally similar antibodies dissolved in the blood plasma D) the part of an antigen that actually binds to an antigen receptor E) a mirror image of an antigen
A measured heritability of 0.7 means that 70% of the phenotypic variation observed is due to genetic differences within
the population. a. True b. Fa
Water molecules are attracted to one another by _____
A) nonpolar covalent bonds B) ionic bonds C) hydrogen bonds D) hydrophobic interactions
Chemicals that play the dominant role in protecting plants from being eaten by herbivores or predators are called
A. secondary compounds. B. poisons. C. amino acids. D. oils. E. primary compounds.