Penicillins and Cephalosporins

question 62

Multiple Choice

Penicillins and cephalosporins

• A)interfere with DNA synthesis.
• B)are metabolic analogs of PABA and block folic acid synthesis.
• C)attach to the 30S ribosomal subunit and disrupt protein synthesis.
• D)damage cell membranes.
• E)block the peptidases that cross-link glycan molecules.

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Definitions:

Extraneous Variable

Denotes any variable other than the independent variable that might cause unwanted changes in the outcome of an experiment.

Independent Variable

The variable that is manipulated or changed in an experiment to test its effects on the dependent variable.

Dependent Variable

In an experiment, the variable that is measured or tested and is expected to change as a result of manipulations to the independent variable.

Interrelated Ideas

Concepts or thoughts that are connected in such a way that they influence or impact each other.