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Molecular Basis Of Inheritance

Question
CBSEENBI12002651
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Semiconservative replication of DNA was first demonstrated in

  • Drosophila melanogaster

  • Escherichia Coli

  • Streptococcus pneumoniae

  • Salmonella typhimurium

Solution

B.

Escherichia Coli

Semiconservative replication of DNA was first demonstrated in E.coil. According to the semiconservative mode proposed by Waston and Crick, each strand of the two double helices formed would have one old and one new strand. The semiconservative nature of DNA of replication was proved by the experiment of Meselson and Stahl (1958).

Some More Questions From Molecular Basis of Inheritance Chapter

List the function of RNA.

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 ?

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