Whether or not an enzyme is active and present within a cell depends on all of the following except
A) if the gene for the enzyme has been turned on and the enzyme made.
B) if the enzyme has been activated or inactivated by the addition of a phosphate group.
C) whether an inhibitor is bound to the enzyme.
D) whether the necessary cofactor is present.
E) whether the enzyme catalyzes an endergonic or exergonic reaction.
Ans: E) whether the enzyme catalyzes an endergonic or exergonic reaction.
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Which of the following mediators would not be categorized as a cytokine?
A. A protein that is released by a bacterial cell following phagocytosis B. A protein that stimulates hematopoiesis C. A protein that regulates adaptive immunity D. A protein that regulates innate resistance mechanisms
In mammals, embryonic cells form an inner cell mass that will become the body of the embryo and a layer of surrounding cells that will become the chorionic membrane and placenta. What are these surrounding cells called?
A. blastocoel B. yolk C. blastodisc D. trophoblast
During meiosis, what are the gametic consequences of a paracentric inversion with a single crossover event, compared to a pericentric inversion with a single crossover?
What will be an ideal response?
ALL of the following are processes involved in the assembly of the rabies virus EXCEPT
a. transcription of the rabies virus genome in the nucleus. b. migration of envelope proteins to the cytoplasmic membrane. c. migration of nucleocapsids to cytoplasmic membrane. d. coating of nucleocapsids with glycoproteins.