Which of the following antibiotics specifically disrupt protein synthesis of streptococci?

A. Beta-lactams
B. Macrolides
C. Cephalosporins
D. Ansamycin
E. Aminoglycosides


Answer: B. Macrolides

Biology & Microbiology

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In the identification of mycobacterial isolates, the niacin test involves the:

a. accumulation of niacin in the medium in which the organism is growing. b. metabolism of niacin to nicotinic acid by enzymatic action. c. testing of the isolate for susceptibility to niacin. d. utilization of niacin in metabolic pathways to produce nicotinic acid.

Biology & Microbiology

Finger-like projections that assist in gathering released eggs into the oviducts after ovulation are called the __________

Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

The parts of the plant that allow for gas exchange are the

A. xylem. B. stomata. C. roots. D. phloem. E. cuticle.

Biology & Microbiology

What mammalian hormone is most similar in amino acid structure to arginine vasotocin in chickens?

A. Oxytocin B. Antidiuretic hormone C. Angiotensin II D. Growth hormone E. Aldosterone

Biology & Microbiology