What antibiotic kills bacteria by disrupting their cell membranes?

A) erythromycin
B) rifampin
C) tetracycline
D) polymyxin B


Ans: D) polymyxin B

Biology & Microbiology

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Chemotherapeutic agents that are chemically modified natural products of microorganisms are most specifically referred to as ________.

A. semisynthetic drugs B. antimicrobial agents C. antibiotics D. synthetic drugs

Biology & Microbiology

Which of the following describes the earliest

protist found in the fossil record?

a. single-celled, free-swimming, asexual reproduction, red alga b. multi-celled, stationary, asexual reproduction, red alga c. multi-celled, free swimming, sexual reproduction, red alga d. multi-celled, stationary, sexual reproduction, red alga e. single-celled, stationary, asexual reproduction, red alga

Biology & Microbiology

Decomposers recycle materials at ____ trophic

level(s). a. the first b. the second c. the third d. the fourth e. any of these

Biology & Microbiology

What factor sponsors translocation of the bacterial ribosome and what events occur during translocation?

What will be an ideal response?

Biology & Microbiology