Q. The expression of the tryptophan operon is independent of the availability of tryptophan in culture media.

View solution

Q. The functional unit in which genes are arranged consecutively is known as ___________

View solution

Q. The investigation of the lac operon for the metabolism of lactose was done by __________

View solution

Q. Presence of lactose itself induces the production of β-galactoside transferase.

View solution

Q. How many enzymes are produced in the lac operon under the same promoter?

View solution

Q. Defects in which regions can affect the activity of the lac operon?

View solution

Q. If the lac operon of the genome of bacteria is always active it has a defect in which region of the operon?

View solution

Q. Lac operon follows a trans-acting control mechanism.

View solution

Q. According to the repressor of lac operon which of the following are false?

View solution

Q. If there is an insertion mutation in the operator of the lac operon, the expression of the lac structural gene will be __________

View solution

Q. The complete expression of the lac operon requires __________

View solution

Q. What effect would a loss-of-function mutation have on the expression of the gene encoding the catabolite activator protein of the lac operon?

View solution

Q. Mutation in the regulatory gene of a positively controlled operon can be identified by __________

View solution

Q. In the case of lac operon, the gene expression is inhibited by __________

View solution

Q. Which of the following is false about bacterial tryptophan operon?

View solution

Q. Attenuator in the tryptophan operon is the __________

View solution

Q. Enhancers that can function over very long distances known as ________________

View solution

Q. Enhancers were first identified in __________

View solution

Q. Enhancers in which of the following positions are unable to enhance the process of transcription?

View solution

Q. Immunoglobulin enhancers are active in which of the following cell types?

View solution