MCQ Book Questions

Q51960. Inducers and repressors are

Q51961. cis-acting elements include

Q51962. Silencer elements

Q51963. trans-acting factors include

Q51964. Enhancer elements have all the following features except

Q51965. Amplification of dihydrofolate reductase gene may be brought about by

Q51966. Proteins which interact with DNA and affect the rate of transcription possess the following structural motif:

Q51967. Lac operon is a cluster of genes present in

Q51968. Lac operon is a cluster of

Q51969. The regulatory i gene of lac operon

Q51970. RNA polymerase holoenzyme binds to lac operon at the following site:

Q51971. Trancription of z, y and a genes of lac operon is prevented by

Q51972. Transcription of structural genes of lac operon is prevented by binding of the repressor tetramer to

Q51973. The enzymes encoded by z, y and a genes of lac operon are inducible, and their inducer is

Q51974. Binding of RNA polymerase holoenzyme to the promoter region of lac operon is facilitated by

Q51975. Lactose or its analogues act as positive regulators of lac operon by

Q51976. Expression of structural genes of lac operon is affected by all the following except

Q51977. The coding sequences in lac operon include

Q51978. Mutations can be caused by

Q51979. Mutations can be caused by