Exam 1: Bacterial Cell Structure, Physiology, Metabolism, and Genetics

The function of a cell wall is to

In what staining procedure does carbolfuchsin penetrate the bacterial cell wall through heat or detergent treatment?

A microbiologist is working with two separate cultures of the same organism. The bacteria in one culture are resistant to penicillin, whereas the bacteria in the other culture are susceptible to penicillin. The bacteria from both cultures are mixed together, and all the resulting bacteria are resistant to penicillin. What caused this phenomenon?

In the laboratory, the clinical microbiologist is responsible for all the following, except

The outer cell wall of the gram-negative bacteria serves three important functions, which includes all the following, except:

If bacteria utilize various carbohydrates for growth, they are usually detected by

Genes that code for antibiotic resistance are often found on small, circular pieces of DNA. These DNA pieces are called

What enables the microbiologist to select the correct media for primary culture and optimize the chance of isolating a pathogenic organism?

Which of these bacteria cannot grow in the presence of oxygen?

What is the purpose of a capsule?

These are enzymes that cut the bacterial DNA at specific locations.

The nuclear membrane in prokaryotes is

The three basic shapes of bacteria include all the following, except

This form of DNA is commonly found in eukaryotic cells.

Mycobacteria have a gram-positive cell wall structure with a waxy layer containing these two compounds.

Which of the following environmental factors influence the growth of bacteria in the laboratory?

Name the numerous short (3 to 10 μm) projections that extend from the cell surface and are used for cellular locomotion.

This constituent of a gram-positive cell wall absorbs crystal violet but is not dissolved by alcohol, thus giving the gram-positive cell its characteristic purple color.

What process involves transferring or exchanging genes between similar regions on two separate DNA molecules?

A clinical laboratory scientist is working on the bench, reading plates, and notices that a culture has both a unicellular form and a filamentous form. What type of organism exhibits these forms?