The major histocompatibility complex is important in a T-cell's ability to:

A. recognize specific viruses.
B. recognize self from nonself.
C. recognize specific parasites.
D. recognize specific bacteria.


Answer: B

Biology & Microbiology

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The anterior pituitary secretes more ACTH, leading to more glucocorticoids in plasma, which causes the anterior

pituitary to then secrete less ACTH. This is an example of ____ regulation.

a. amplification only b. positive feedback only c. negative feedback d. cascading feedback e. both amplification and positive feedback

Biology & Microbiology

Members of this lineage are highly active, have a closed circulatory system, and have a high oxygen

requirement.

a. Cephalopoda b. Polyplacophora c. Bivalvia d. Gastropoda e. Scaphopoda

Biology & Microbiology

Which white blood cell type is usually the first

to encounter an invading pathogen?

a. B cell b. T cell c. macrophage d. natural killer cell e. basophil

Biology & Microbiology

Suppose a phage infected a protease-deficient bacterial cell. Would the lytic or lysogenic life cycle be favored? Why?

What will be an ideal response?

Biology & Microbiology