Generally, the first antibody class made upon a primary antigen exposure is

A) IgA. B) IgD. C) IgE. D) IgG. E) IgM.


Answer: E

Biology & Microbiology

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The structure of a mature, functional fruit always includes _____

A) one or more seeds B) extensive vascular connections to the parent plant C) fleshy cells rich in sugars D) brightly colored pigments to attract animal dispersers E) subtending bracts to protect against predators

Biology & Microbiology

Alzheimer disease has been shown to be related to ____

a. alcoholic fermentation in the brain b. lactate fermentation in the brain c. increased brain metabolism d. decreased brain metabolism e. increased mitochondrial enzyme activity

Biology & Microbiology

How would the cDNA created in a lab compare to the original DNA?

A) It would contain only the genes that were producing proteins in the cell at the time the cDNA was created. B) It would be identical to the original DNA. C) It would be a single strand instead of the original double-stranded DNA. D) It would be circular, similar to bacterial DNA.

Biology & Microbiology

Implantation occurs in the:

A) vagina. B) ovary. C) uterus. D) uterine tube.

Biology & Microbiology