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Select the two correct statements out of the four given below about lac operon.
(i) Glucose or galactose may bind with the repressor and inactivate it.
(ii) In the absence of lactose the repressor binds with the operator region
(iii) The z-gene codes for permease
(iv) This was elucidated by Francois jacob and Jacque monod are:

A

II and III

B

I and III

C

II and IV

D

I and II

Text Solution

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The correct Answer is:
C
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ICSE-MOLECULAR BASIS OF INHERITANCE-OBJECTIVE TYPE QUESTIONS (MULTIPLE CHOICE QUESTION (MCQ)
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  2. Select the two correct statements out of the four given below about la...

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  3. The one aspect which is not a salient feature of genetic code, it its ...

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  4. The process of copying genetic information from one strand of the DNA ...

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  5. In the Lac operon system, Beta-galactosidase is coded by

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  6. Match the codons with their respective amino acids and choose the corr...

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  7. Consider the following statements. I. rRNA provides the template for...

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  8. In bacteria, the formation of peptide bond during translation is effec...

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  9. At 5’ end of a polynucleotide chain

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  10. Reverse transcriptase is also called

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  11. During chain elongation, peptide bond is formed between carboxyl group...

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  12. Balbiani rings are sites of

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  13. How many effective codons are there for the synthesis of twenty amino ...

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  14. Which one fo the following structural formulae of two orgainc compo...

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  15. What are those structures that appear as 'beads'-on-string' in the chr...

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  16. Gene regulation governing lactose operon of E. coli that involves the...

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  17. In sea urchin DNA, which is double stranded, 17% of the bases were sho...

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  18. Which one of the following is the starter codon?

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  19. The amino acid Tryptophan is the precursor for the synthesis of

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  20. Which of the following statements is not true for cancer cells in rela...

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