How many checkpoints are found along the cell cycle?

a. 1
b. 2
c. 3
d. 4


c. 3

Biology & Microbiology

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Siderophores from some pathogens remove iron from the host protein(s)

A) lactoferrin. B) transferrin. C) both lactoferrin and transferrin. D) cytochromes.

Biology & Microbiology

In the identification of mycobacterial isolates, the niacin test involves the:

a. accumulation of niacin in the medium in which the organism is growing. b. metabolism of niacin to nicotinic acid by enzymatic action. c. testing of the isolate for susceptibility to niacin. d. utilization of niacin in metabolic pathways to produce nicotinic acid.

Biology & Microbiology

On mRNA molecules, a nontranslated sequence called the ________ usually precedes the initiation codon.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Medications which block viral entry into cells include (adhesin/analog/attachment) antagonists

What will be an ideal response?

Biology & Microbiology