Which of the following is pyogenic (pus forming)?

A. Streptococcus pyogenes
B. Lactococcus lactis
C. Streptococcus mutans
D. Streptococcus fecaelis


Answer: A

Biology & Microbiology

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Enzymes that are expressed at a constant level all the time are said to be                        .

A. inducible B. constitutive C. attenuated D. repressible

Biology & Microbiology

Pyruvate is converted to acetyl CoA by a unique enzyme known as

A) pyruvate decarboxylase. B) pyruvate dehydrogenase complex. C) transitionase system. D) multiplex enzyme system. E) pyruvate CoA transferase.

Biology & Microbiology

Although we know of threats to about ____ wild plant species, the actual number is likely much higher

a. 5,000 b. 7,000 c. 12,000 d. 37,000 e. 130,000

Biology & Microbiology

Which of the following structures is exclusively associated with prokaryotic cells?

A) membrane-bound nucleus B) nucleoid C) chromosome D) ribosomes

Biology & Microbiology