What antibiotic kills bacteria by disrupting their cell membranes?
A) erythromycin
B) rifampin
C) tetracycline
D) polymyxin B
Ans: D) polymyxin B
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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
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
Decomposers recycle materials at ____ trophic
level(s). a. the first b. the second c. the third d. the fourth e. any of these
What factor sponsors translocation of the bacterial ribosome and what events occur during translocation?
What will be an ideal response?