Which of the following exercises control over transcription:
1.  Operator
2.  Regulator
3.  Promoter
4.  Recon

In inducible operon, regulatory gene synthesizes:
1. Promoter
2. Operator
3. Repressor
4. Aporepressor

In Negative operon:
1.  Inducer binds with repressor
2.  Co-repressor does not bind with repressor
3.  Corepressor binds with inducer
4.  CAMP has a negative effect on the lac operon

In E. Coli, during lactose metabolism, the repressor binds to:

1. Regulator gene

2. Operator gene

3. Structural gene

4. Promoter gene

Jacob and Monad studied lactose metabolism in E.Coli and proposed the Operon concept. The Operon concept is applicable to:

1. All prokaryotes

2. All prokaryotes and some eukaryotes

3. All prokaryotes and all eukaryotes

4. All prokaryotes and some protozoans

What does "lac" refer to in what we call the lac operon:

1. Lactose

2. Lactase

3. Lac insect

4. The number 1,00,000

In transgenics expression of a transgene in the target tissue is determined by:

1. Transgene

2. Promoter

3. Reporter

4. Enhancer 

E. coli cells with a mutated z gene of the lac operon cannot grow in a medium containing only lactose as the source of energy because-