In the tryptophan operon, low level of tryptophan nutrient results in the following events EXCEPT
A) that the synthesis of leader peptide is stalled.
B) continuous transcription of the trp operon.
C) that tryptophan repressor cannot bind to trp operator in the trp operon.
D) synthesis of polycistronic mRNA of tryptophan structural genes.
E) that regions 3 and 4 form a stem-loop.
Ans: E) that regions 3 and 4 form a stem-loop.
You might also like to view...
As a general rule, the small intestine of a pig or human is
a. about 60 cm long. b. about 1.5 m long. c. about as long as the individual is tall (or long in the case of the pig). d. about five times the height of the individual.
What happens when plants are illuminated with directional light from the side instead of from directly overhead?
A. Auxin is transported away from the lighted side. B. More auxin is produced. C. Auxin receptors are activated. D. Less auxin is produced. E. Auxin is transported toward the lighted side.
The vertebrate group that describes all jawed vertebrates with two pairs of limbs is the
A) craniates. B) amniotes. C) tetrapods. D) mammals.
Describe how sperm and egg cells are different from somatic cells in number of chromosomes (in humans), the cell division processes they undergo and the process that generates them, and the process they undergo to generate a zygote
What will be an ideal response?