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Molecular Basis Of Inheritance

Question
CBSEENBI12002162
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Which of the following is required as inducer(s0 for the expression of lac operon?

  • galactose

  • lactose

  • lactose and galactose

  • glucose

Solution

B.

lactose

Lac operon is and inducible operon. Lactose is the substrate for the enzyme straight beta-galactosidase and it also regulates switching on and off of the operon. Hence, it is termed as inducer. 

Some More Questions From Molecular Basis of Inheritance Chapter

List the number of base pairs in :

(i) lambda bacteriophage

(ii) E.coli and

(iii) haploid content of human DNA.

Comment two chains of DNA have antiparallel polarity.

What is the difference between DNAs and DNAase ?

Which was first genetic material ?

Suggest one evidence to prove that RNA was first genetic material.

Why was RNA unstable ?

What made DNA more preferrable as genetic material ?

Process of replication is completed in how much time in E.coli ?

What is average rate of polymerization ?

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