During the shotgun approach to genome sequencing, the sequenced fragments orginate from:
A. the beginning of a gene.
B. the center of a gene.
C. random sites scattered across the
genome.
D. targeted sites scattered across the
genome.
E. None of the answer options are correct.
C
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In negative control of transcription, how does the presence of an inducer affect transcription?
A) The inducer binds to the operator. B) The inducer does not bind to the operator. C) The inducer causes the repressor to bind to the operator. D) The inducer prevents the repressor from binding to the operator.
Which of the following is a hormone that acts on the kidney's collecting ducts, increasing activity of sodium-potassium pumps so more sodium gets reabsorbed?
a. atrial natriuretic peptide (ANP) b. renin c. ADH d. aldosterone
Fishes that exhibit a sedentary lifestyle have ____ bodies
a. fusiform b. laterally compressed c. globular d. flattened e. streamlined
Superantigens are
A. cell markers found in some member of a species but not in other members. B. bacterial toxins that activate T-cells at a 100 times greater rate than other antigens. C. body tissues that the immune system mistakes as foreign. D. those that evoke allergic reactions.