The naive mature B lymphocytes and T lymphocytes develop initially in the bone marrow and thymus respectively. Upon contact with the microbial antigens, these cells differentiate to memory cells among other forms
a. true
b. false
Ans: a. true
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What is common to all of the oxidation reactions in the Krebs cycle?
A. They all lead to the generation of NADH. B. They are all decarboxylation reactions. C. They are all characterized by a loss of electrons from an organic molecule coupled to the reduction of an electron acceptor. D. They all lead to substrate-level phosphorylation of ADP to generate ATP.
The ________ reaction sequentially links adjacent amino acids into the growing polypeptide chain.
A. transpeptidation B. dipeptidation C. propeptidation D. peptidation
Latency in HIV occurs when
A. the virus switches back to an active form. B. new viral particles are made. C. the viral genome forms an episome and remains dormant. D. the virus integrates into the host genome and remains dormant
The principle of comparative advantage is associated with
a. restricting consumer choices. b. greater production at higher prices. c. specialization and exchange. d. comparing the efficiency of alternative tariffs.