Cells naturally, without using energy, respond to changes in water concentration through the process of
a. facilitated diffusion.
b. osmosis.
c. phagocytosis.
d. active transport.
Ans: b. osmosis.
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All of the following participate in apoptosis except
A) caspases. B) death-promoting proteins. C) mitochondria. D) Bcl-2. E) calcium ions
Lymphocytic choriomeningitis (LCM) and Lassa fever are considered which type of virus?
a. Adenovirus b. Papillomavirus c. Picornavirus d. Arenavirus
The perforin-granzyme pathway involves
A) the production of fever, which kills the pathogen. B) the production of antibodies toward the invading pathogen. C) the production of special cell-killing proteins that act on infected or abnormal cells. D) presenting the foreign antigen to B cells. E) binding CD95L to infected cells, which eventually leads to cell apoptosis.
Enzymes that are only produced when substrate is present are termed
A. constitutive enzymes. B. induced enzymes. C. conjugated enzymes. D. exoenzymes. E. endoenzymes.