Compare and contrast Creutzfeld-Jakob disease (CJD) variant CJD, and kuru with regard to: a) causative agent, b) transmission, c) reservoir, d) pathogenesis and symptoms, and e) methods for prevention.
What will be an ideal response?
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Minimal media is
A) growth media used in the smallest volume in which cells can grow. B) growth media designed to minimize the growth of contaminants. C) growth media that contains the minimal nutritional requirements for normal cells. D) a way to visualize new mutations in a minimum amount of time. E) used to reveal only mutant cell colonies against a dark background.
What is a regulatory protein for a gene? It binds to specific DNA sequences with high affinity and plays a predominant role in determining if a genome segment is transcribed or not.
a) the terminator b) the promotor c) the structural genes d) the repressor e) the operator
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.
As a doctor, you discover a new virus that prevents the body from creating memory cells. Based on what you know about human defenses against disease, you predict that this virus is infecting and destroying which type of white blood cell?
A) Dendritic cells B) Lymphocytes C) Mast cells D) Macrophages E) Natural killer cells