Which of the following exercises control over transcription:
1. Operator
2. Regulator
3. Promoter
4. Recon
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn inducible operon, regulatory gene synthesizes:
1. Promoter
2. Operator
3. Repressor
4. Aporepressor
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn E. Coli, during lactose metabolism, the repressor binds to:
1. Regulator gene
2. Operator gene
3. Structural gene
4. Promoter gene
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyJacob 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat does "lac" refer to in what we call the lac operon:
1. Lactose
2. Lactase
3. Lac insect
4. The number 1,00,000
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn transgenics expression of a transgene in the target tissue is determined by:
1. Transgene
2. Promoter
3. Reporter
4. Enhancer
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyE. 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-
1. | They cannot synthesize functional beta-galactosidase |
2. | They cannot transport lactose from the medium into the cell |
3. | The lac operon is constitutively active in these cells |
4. | In the presence of glucose, E. coli cells do not utilize lactose |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology