A cytotoxic T lymphocyte, having been activated against a particular viral antigen, "sees" this same antigen displayed on the surface of a host cell. What will happen?
A. The cytotoxic body cell will activate B cells which then produce antibody against the antigen.
B. The cytotoxic T cell will produce proteins that cause the host body cell to die.
C. The cytotoxic T cell will produce antibodies against the antigen.
D. The antigen will move inside of the host body cell, thereby hiding from the cytotoxic T cell.
Answer: B
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Which of the following would be considered an integral membrane protein? Select all correct choices
A. a protein with its N-terminus in the cytoplasm and its C-terminus in the extracellular space B. a protein attached to a transmembrane protein via hydrogen bonding C. a protein attached to a phospholipid via ionic bonding with the head group of the lipid molecule D. a protein capable of diffusing throughout the cytoplasm of a cell
The humoral immune response defends against ________.
A. bacteria B. viruses C. bacterial toxins D. All of the choices are correct.
Marine plants may contribute to the prevention of algal blooms by:
a. trapping sediments. b. absorbing excess nutrients. c. removing toxic organic pollutants. d. producing detritus. e. blocking sunlight.
Which of the following would be an example of paedomorphosis?
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