Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific ________ that the immune system produces against the virus.

A. glycoproteins
B. complement proteins
C. antigens
D. antibodies


Answer: D

Biology & Microbiology

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Which aspect(s) of natural selection is(are) illustrated by the figure below? Check all that apply.



_____  Variation must exist in the population.
_____  Variation among individuals must be genetically transmissible to the next generation.
_____  Variation among individuals leads to differences in lifetime reproductive success.
_____  More individuals are produced each generation than the environment can support, resulting in competition for survival.

Biology & Microbiology

The youngest leaf primordium is produced closest to the stem tip because:

A. Auxins are closest to the tip. B. The tip is elongating outward. C. The leaf primordial only respond to light. D. The primordial lack a sense of direction. E. Expansion genes do not function well in aging tissue.

Biology & Microbiology

When utilizing fats as an energy source, the glycerol portion enters the ________ when it has been converted to ________.

A) TCA cycle; pyruvate B) glycolysis; fructose-6-phosphate C) TCA cycle; acetyl CoA D) electron transport system; CoQ E) glycolysis; dihydroxyacetone phosphate

Biology & Microbiology

A molecule is

a. a combination of two or more atoms. b. a mixture of atoms. c. electrically charged. d. a carrier of one or more extra neutrons. e. none of these

Biology & Microbiology