The ability of a microbial cell to produce beta-lactamases is based on _______.

A. other organisms
B. its environment
C. the temperature
D. its genetics


D. its genetics

Biology & Microbiology

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A fisherman who cut himself on a fishing hook later develops a cutaneous disease at the inoculation site. The exudate is aspirated and set up on a routine AFB medium for culture. It is incubated at 37°C, but no growth is observed after 8 weeks; however, a slide of the exudate was AFB-positive. Which one of the following statements explains these findings?

a. The infection is most likely the result of a viral infection. b. The organism should have been incubated at 30°C. c. The organism should have been incubated at 42°C. d. The infection is most likely fungal in na-ture.

Biology & Microbiology

Which RNA acts as an enzyme?

a. mRNA b. rRNA c. tRNA d. mRNA and rRNA e. rRNA and tRNA

Biology & Microbiology

Using Figure 53-2, identify the point that indicates the carrying capacity for this population

a. A
b. B
c. C
d. D
e. Cannot be determined from this graph.

Biology & Microbiology

  Figure 32.17 ? Use the figure above showing a reflex arc to answer the following question. Stretch-sensitive muscle spindles are indicated by the letter _____.

A. A B. B C. C D. D E. C and D

Biology & Microbiology