When a Structural Gene Is Under Positive Inducible Control, What

question 53

Multiple Choice

When a structural gene is under positive inducible control, what would be the result of a mutation that eliminates the activator protein?

• A) The structural gene will be constitutively expressed due to the lack of inducible control.
• B) The transcription of the structural gene will not be affected, as an activator is not required.
• C) The mutation will lead to activation of a repressor upon the lack of an activator protein, which will block transcription.
• D) Since transcription will require an activator protein, the transcription will be turned off.
• E) More cAMP will be produced in a cell to compensate for the lack of an activator protein.

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Definitions:

Norm-Referenced

A type of test that compares an individual's performance to a statistical norm or average performance of a defined group.

Standard Error of Measurement

The range of scores where we would expect a person’s score to fall if he or she took the instrument over and over again—in other words, where a “true” score might lie. It is calculated by taking the square root of 1 minus the reliability and multiplying that number by the standard deviation of the desired score.

Median

A measure of central tendency that is the middle score, or the score for which 50% of scores fall above and 50% fall below. In a skewed curve or skewed distribution of test scores, the median is generally the most accurate measure of central tendency since it is not affected by unusually high or low scores.

Standard Error of Measurement (SEM)

The margin of error in an individual's score, representing the variability in scores if the test were administered multiple times.