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The three codons which result in the te...

The three codons which result in the termination of polypeptide chain synthesis are

A

TAG , TAA , TGA

B

GAT, AAT , AGT

C

AGT , TAG , UGA

D

UAA , UAG , UGA

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The correct Answer is:
D
UAA , UAG and UGA act as stop codons (terminator codons) bacause these are not translated into amino acid . UAA is called ochre, UAG as ambera and UGA s opal.
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-MOLECULAR BASIS OF INHERITANCE-EXERCISE
  1. Protein synthesis in an animal cell, takes place

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  2. Which of the following RNAs up specific amino acid (from amino acid po...

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  3. The three codons which result in the termination of polypeptide chain...

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  4. Genes are packed in bacterial chromosome by

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  5. An enzyme that joins the ends of two strands of nucleic acids is a

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  6. Okazaki fragments are seen during

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  7. Triplet for inhibitting process of translation is

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  8. The basis of DNA fingerprinting is :

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  9. In eukaryotic genes, coding sequences are called :

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  10. If the sequences of bases in DNA is ATTCGATG, then the sequence of bas...

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  11. Anticodon is an unpaired triplet of bases in an exposed position of

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  12. The wild type E. coli cells are growing in normal medium with glucose....

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  13. Which is not directly involved in protein synthesis ?

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  14. There are special proteins that help to open up DNA double helix in fr...

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  15. DNA template sequence of CTGATAGC is transcribed over mRNA as

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  16. In Escherichia coli, lac operon is induced by :

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  17. Reverse transcriptase is :

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  18. The number of base substitution possible in amino acid codons is

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  19. The codon for the initiation of protein synthesis in eukaryotes is :

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  20. Nucleosome core is made of :

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