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Molecular Basis Of Inheritance

Question
CBSEENBI12047381
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Which codon is not an indicator of completion of protein synthesis?

  • UAG

  • AUG

  • UAA

  • UGA

Solution

B.

AUG

Stop codon or termination codon is a nucleotide triplet within mRNA that signals a termination of translation. It signals the termination of this process by binding release factors which cause the ribosomal subunits to dissociate, releasing the amino acid chain. There are three stop codons (for RNA/DNA) respectively i.e.,

For DNA :- UAG (amber), UAA (ochre)  and UGA (opal) 

For RNA :- TAG (amber), TAA (ochre)  and TGA (opal). 

AUG acts as the strandard start (or initiation) codon for both DNA and RNA respectively.

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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