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Molecular Basis of Inheritance

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they

  • act as replicons.

  • are RNA transcription initiator

  • help chromosome pairing

  • prevent chromosome loss


D.

prevent chromosome loss

Telomeres are ends of a chromosome, have repetitive DNA sequences and are stable and resistant to exonuclease digestion hence, essential for chromosome stability. 

Telomeres are ends of a chromosome, have repetitive DNA sequences and are stable and resistant to exonuclease digestion hence, essential for chromosome stability. 


Comment two chains of DNA have antiparallel polarity.

The Two chain of DNA are antiparallel that is
if one chain has 5’ x 3’ polarity the other chain has 3’ x 5’ polarity.

List the number of base pairs in :

(i) lambda bacteriophage

(ii) E.coli and

(iii) haploid content of human DNA.


(i) 48502 bp
(ii) 4.6 x 106 bp and
(iii) 3.3 x 109 bp.

How many nucleotides are present in a bacteriophage ϕ x 174.

5386

Name the genetic material for majority of organisms.

DNA (Deoxyribose nucleic acid)

List the function of RNA.

Functions of RNA
RNA acts as genetic material in viruses
It also functions as an adapter and messenger 
It also acts as a catalytic molecule and catalyses various biochemical reactions.