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While an mRNA strand is being translated...

While an mRNA strand is being translated in the ribosome subunit, the triplets in sequence were UAC and UAG. One of them. codes for tyrosine. What is the significance of the other? Pick out the codon and specify.

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. UAG is termination code and leads to termination of polypeptide chain. It does not specify any amino acid
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Which of these statements about protein synthesis are NOT correct ? I. During transcription, mRNA synthesized from DNA nucleotides to have the same sequence of nucleotides as the DNA strand on which it was made. II. During transcription , tRNA is synthesized from RNA nucleotides and carries codons that are complementary to the sequence of nucleotides on the DNA strand on which it was made. III. During translation, mRNA is synthesized from RNA nucleotides to have the complementary sequence of nucleotides to that. Of the DNA strand on which it was made . IV. During translation ribosomes move on mRNA from '5' and '3' one codon at a time .This is called translocation

ICSE-MOLECULAR BASIS OF INHERITANCE-PRACTICE QUESTIONS (VERY SHORT ANSWER TYPE QUESTIONS
  1. Name the initiation codon for protein synthesis. Name the amino acid i...

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  2. What is the function of amino-acyl-tRNA synthetase?

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  3. What is the function of ligase?

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  4. Name the process in which the unwanted mRNA regions are removed and th...

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  5. Mention the role of DNA polymerase other than polymerising deoxyribonu...

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  6. What is nucleosome?

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  7. Give chemical name for thymine.

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  8. Name the technique used in making copies of a specific segment of DNA

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  9. Due to an error during transcription, ATG of DNA formed UAG in mRNA. W...

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  10. While an mRNA strand is being translated in the ribosome subunit, the ...

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  11. Name the components ‘a’ and ‘b’ in the nucleotide with a purine below

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  12. Name the technique used for separating DNA fragments in the laboratory...

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  13. Why hnRNA' is required to undergo splicing

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  14. Mention the two addition processing which hnRNA needs to undergo after...

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  15. Mention two functions of the codon AUG.

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  16. Why is the enzyme cellulose used for isolating genetic material from p...

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  17. How is the action of exonuclease different from that of endonuclease ?

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  18. Give one word - One codon codes for only one amino acid. The genetic c...

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  19. Name the positively charged proteins around which the negatively charg...

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  20. Name the two basic amino acids that provide positive charges to histon...

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