Most cancers are

A) environmentally triggered.
B) the result of life style.
C) inherited.
D) viral infections.
E) both choices A and B


E) both choices A and B

Biology & Microbiology

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The human immunodeficiency virus mounts a direct attack on TH cells by recognizing the _______ surface proteins associated with these cells.  

A.  Fc B.  CD4 C.  epitope D.  cytokine

Biology & Microbiology

The use of two ATP molecules at the beginning of

glycolysis is comparable to __________ in finances. a. a dividend b. a credit c. a debt d. an investment e. liquidity

Biology & Microbiology

An illegal practice is found among some athletes who try to increase the normal number of RBCs in an attempt to boost oxygen delivery. This practice is called ________

A) blood doping B) leukemia C) bloodletting D) bone marrow transplant

Biology & Microbiology

The specificity of an antibody is due to

A) its valence. B) the H chains. C) the L chains. D) the constant portions of the H and L chains. E) the variable portions of the H and L chains.

Biology & Microbiology