Red blood cells are
a. erythrocytes.
b. leukocytes.
c. platelets.
d. all of the above.
b
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What happens to the ATP molecule after it has been used to do work?
A. It is completely destroyed. B. It breaks down into carbon dioxide and water. C. It is split into two molecules of pyruvic acid. D. It loses a phosphate group and is converted to ADP.
How do fungi reproduce sexually?
A. Fungi reproduce only by asexual reproduction B. By the fusion of spores from the same individual fungus C. By the fusion of haploid cells from two different fungi D. By the fusion of zygotes from two different fungi
Which phrase best describes nucleosomes?
a. eukaryotic DNA associated with histone proteins b. eukaryotic DNA associated with nonhistone proteins c. prokaryotic DNA associated with nonhistone proteins d. prokaryotic DNA associated with histone proteins
Antigen-antibody complexes trapped in tissues and triggering complement activation or mast cell degranulation are characteristic of
A) type I hypersensitivity. B) type II hypersensitivity. C) type III hypersensitivity. D) autoimmunity. E) graft rejection.