Which of the following phrases best completes

this sentence: Plasmids, as used as tools in
DNA research, are



a. clones.
b. recombinants.
c. vectors.
d. restriction enzymes.
e. DNA libraries.


C

Biology & Microbiology

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Normal microflora are usually found in the blood, lymph, and nervous systems of the body

Indicate whether the statement is true or false.

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The ?-jelly roll of the Lpt system functions to

A. help translocate assembled LPS across the outer membrane of the bacterial cell. B. help attach the O-antigen to core oligosaccharide moieties during synthesis of LPS. C. help anchor the newly positioned LPS on the bacterial cell surface. D. help hide lipid A from the hydrophilic periplasm during LPS transport to the membrane.

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How many turns of the Krebs cycle (also called the citric acid cycle) are needed to fully breakdown the energy in one glucose molecule?

a) 2 turns b) 1 turn c) 3 turns d) 1.5 turns e) 4 turns

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After fermentation in human cells, lactate is converted to pyruvate in the

A) bone marrow. B) heart. C) muscles. D) lungs. E) bloodstream.

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