A microorganism that can use ready-made folic acid from its environment and no longer needs to synthesize it from the PABA precursor demonstrates an example of what type of antimicrobial resistance mechanism?

A) alteration of an enzyme
B) alteration of targets
C) development of enzymes
D) alteration of a metabolic pathway


Ans: D) alteration of a metabolic pathway

Biology & Microbiology

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Continental drift caused the large supercontinent that existed during the Paleozoic era to separate into a northern

continent, called ____, and a southern continent, called ____.

a. Pangaea; Laurasia b. Laurasia; Gondwana

c. Gondwana; Laurasia d. Pangaea; Gondwana e. Gondwana; Pangaea

Biology & Microbiology

Brain tumors in children are very common in the cerebellum. Which symptoms might lead a doctor to suspect this

type of tumor?

a. difficulty hearing b. difficulty seeing c. difficulty walking d. forgetting previously learned skills e. suddenly starting to speak in gibberish

Biology & Microbiology

Some ecologists specialize in endangered species. Because the emphasis of their studies would involve counting members of the same species in an area, which branch of ecology would this job fall under?

a. organismal ecology b. community ecology c. population ecology d. ecosystem ecology

Biology & Microbiology

Mycobacterium tuberculosis:

A. produces several virulence factor enzymes and an exotoxin. B. has a cord factor that can prevent destruction by lysosomes and macrophages. C. is a spore former. D. has a capsule. E. lives in the soil.

Biology & Microbiology