What is the central purpose of aseptic technique?

A) To identify pathogenic bacteria
B) To prevent the spread of contamination
C) To cure disease
D) To find new antibiotics


B) To prevent the spread of contamination

Biology & Microbiology

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Many organisms grow in areas where sun and nutrition sources are poor, such as the hydrothermal vents at the bottom of the ocean. By what process do these organisms make their own food?

a. photoautotrophy b. diffusion c. chemoautotrophy d. predation

Biology & Microbiology

What is at the center of a heme molecule in a hemoglobin protein?

a. a beta globin chain b. an alpha globin chain c. iron d. nitrogen e. another heme molecule

Biology & Microbiology

Mechanisms that prevent mating between species are called ________ isolating mechanisms

Fill in the blank(s) with correct word

Biology & Microbiology

The drug metronidazole is effective on both bacteria and some protozoa. It can therefore be described as a ________ drug.

A. narrow spectrum B. broad spectrum C. full spectrum D. general spectrum E. specific spectrum

Biology & Microbiology