Which protist groups consists of individuals who often have intracellular shells of interlocking plates?

a. diatoms
b. red algae
c. euglenoids
d. green algae
e. dinoflagellates


e

Biology & Microbiology

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Dead Artemia cells that have been treated with trypan blue appear

(a) colorless. (b) blue. (c) red. (d) indistinguishable from living treated cells.

Biology & Microbiology

The ascending portion of the loop of Henle is

A. permeable to water and impermeable to sodium. B. permeable to water and permeable to sodium. C. impermeable to water and permeable to sodium. D. impermeable to water and impermeable to sodium. E. the site of active transport of water.

Biology & Microbiology

Pericardial fluid may be inoculated in blood culture broth and processed as a blood culture, provided the broth contains which anticoagulant?

a. Heparin b. Ethylenediaminetetraacetic acid (EDTA) c. Citrate d. Coumadin

Biology & Microbiology

The condition shown in the photograph, xeroderma pigmentosum, is caused by dimerization of thymine bases when UV damage to DNA is not repaired. What mechanism exists to repair this kind of damage to DNA?



a. proofreading
b. nucleotide mismatch repair
c. nucleotide excision repair
d. phosphodiester substitution

Biology & Microbiology