Deletion of one of the two trp codons in the leader sequence of the TRP operon (att-) result

a. the operon never being transcribed
b. in little or no phenotype in the presence of high TRP in the cell.
c. in the operon not being able decrease production of TRP when TRP is high in the cell.
d. an increase in the production of TRP regardless of the levels of TRP in the cell


Ans: b. in little or no phenotype in the presence of high TRP in the cell.

Biology & Microbiology

You might also like to view...

A cohort is:

a. a group of individuals of the same species born during the same time interval b. any member of the same species c. any member of the same species and sex within a population d. a sexual mate e. a litter mate or sibling within a large population

Biology & Microbiology

A patient who has had a severe hemorrhage accidentally receives a large transfusion of distilled water

directly into a major blood vessel. You would expect this mistake to: a. have no unfavorable effect as long as the water is free of bacteria. b. have serious, perhaps fatal consequences because there would be too much fluid to pump. c. have serious, perhaps fatal consequences because the red blood cells could shrink. d. have serious, perhaps fatal consequences because the red blood cells could swell and burst. e. have no serious effect because the kidney could quickly eliminate excess water.

Biology & Microbiology

An embryo with meroblastic cleavage, extraembryonic membranes, and a primitive streak must be that of _____

A) an insect B) an amphibian C) a bird D) a sea urchin

Biology & Microbiology

What is the outstanding characteristic of the Kingdom Fungi?

A) All members are photosynthetic. B) Members absorb dissolved organic matter. C) Members absorb dissolved inorganic matter. D) All members are microscopic. E) All members are macroscopic.

Biology & Microbiology