A Circular DNA Molecule Has N Target Sites for Restriction

question 46

Multiple Choice

A circular DNA molecule has n target sites for restriction enzyme EcoRI.How many fragments will be produced after complete digestion?

• A)n - 1
• B)n
• C)n + 1
• D)2n - 1
• E)2n + 2

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Definitions:

Pretest

An initial test or assessment conducted before the main test or experiment to evaluate participants' baseline abilities, knowledge, or attitudes.

Pretest-Posttest

A research design that measures the effect of an intervention by comparing conditions before and after the intervention is applied.

Posttest-Only

A research design where measures are taken only after the experimental manipulation, without a pretest comparison.

Mortality

The loss of subjects who decide to leave an experiment. Mortality is a threat to internal validity when the mortality rate is related to the nature of the experimental manipulation.