Antibiotics that contain a beta-lactam ring

A) bind to and cross-link peptidoglycans
B) act as an antimetabolite
C) bind to a bacterial RNA polymerase
D) are erroneously incorporated as nucleic acids


Ans: A) bind to and cross-link peptidoglycans

Biology & Microbiology

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List the primary germ layers formed by gastrulation. What tissues will they form in the adult?

Endoderm: Mesoderm: Ectoderm:

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Filtration occurs in the region labeled____

a. 1 b. 2 only c. 3 only d. 4 e. 2 and 3

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Dehydration synthesis reactions are forms of ____

a. catabolism b. anabolism c. enzymatic deficiency d. intermediary metabolism e. denaturation

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Eutrophication of a lake could occur if

A) phosphate-rich detergents were dumped into the lake. B) fertilizers were applied in an insoluble form. C) runoff from overfertilized lawns was prevented from reaching the lake. D) fish were removed.

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