Which of the following are phagocytic glial cells that fight infection and remove debris?

A) microglia
B) oligodendrocytes
C) Schwann cells
D) myelin sheath cells
E) astrocytes


Answer: A

Biology & Microbiology

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Xeroderma pigmentosum is caused by

a. a thymine dimer. b. a translocation. c. a deletion. d. an inversion. e. a duplication.

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The alpha helix is an example of which level of protein structure?

a. Primary b. Quaternary c. Secondary d. Tertiary

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Which of the following human digestive enzymes is NOT correctly matched to its substrate?

A. pepsin - protein B. salivary amylase - starch C. trypsin - nucleic acid D. maltase - maltose E. lipase - fat

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Number 2 in the figure is an example of:

a. recapitulation via hypermorphosis. c. paedomorphosis via progenesis. b. recapitulation via acceleration. d. paedomorphosis via neoteny.

Biology & Microbiology