In the regulation of the trp operon, tryptophan acts as a(n)

A) repressor.
B) attenuator.
C) activator.
D) effector.
E) operator.


D) effector.

Biology & Microbiology

You might also like to view...

Which of the following hormones stimulates an increase in basal metabolic rate as a tropic hormone?

a) prolactin b) follicle-stimulating hormone c) adrenocorticotropic hormone d) thyroid-stimulating hormone

Biology & Microbiology

Traits which by logic should show less genetic variation because of their close association with reproduction fall into which category?

A) life-history traits B) behavioral traits C) physiological traits D) morphological traits

Biology & Microbiology

Why do freshwater fish die in salt water

What will be an ideal response?

Biology & Microbiology

Which of the following statements about the greenhouse effect is true?

A) The greenhouse effect is reduced by deforestation. B) The greenhouse effect is exacerbated by the use of fossil fuels. C) The greenhouse effect will decrease the average temperature of the planet. D) The greenhouse effect decreases plant growth.

Biology & Microbiology