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When TMV-RNA is used for infection, the ...

When TMV-RNA is used for infection, the amino acid sequence of the coat protein of the progeny is the same whether the host is Zinnia or tabacco. This proves that the genetic code is

A

degenerate

B

universal

C

unidirectional

D

non-overlapping

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The correct Answer is:
B
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A genetic unit that codes for the amino acid sequence of a complete plypeptide chain is most closely related to a :

RNA responsible for directing proper sequence of amino acids in protein synthesis is:

A single amino acid is often coded by more than one triplet code. In most of the cases the first two bases are the same but the third base is different. This feature of the genetic code is called :

Messenger RNA encodes the amino acid sequence of a protein. A triplet of nitrogenous bases in m-RNA specifying an amino acid is called an anticodon.

The type of RNA specifically responsible for directing the proper sequence of amino acids in protein synthesis is :

Read the following statements. (i) One codon codes for only one amino acid. (ii) Some amino acids are coded by more than one codon. (iii) The sequence of triplet nitrogenous bases in DNA of mRNA coresponds to the amino acid sequence in the polypeptide chain. Give , suitabel terms for the characteristics of 'genetic code' as per the above statements.

When more than one codon code for the same amino acid, this is called as :

ARIHANT NEET-GENE, ITS EXPRESSION AND REGULATION-Chapter Exercise (A) Taking it together (Assorted questions of the Chapter for Advanced Level Practice
  1. Discontinuous synthesis of DNA occurs in one strand, because

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  2. With regard to mature mRNA in eukaryotes

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  3. When TMV-RNA is used for infection, the amino acid sequence of the coa...

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  4. Which of the following is not true for an anticodon?

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  5. In E. coli, tryptophan switches off the trp operon by

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  6. A bacterium with completely radioactive DNA was allowed to replicate i...

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  7. RNA and DNA were artificially synthesised in vitro by

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  8. There are 64 codons in genetic code dictionary because

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  9. A songle anticodon can recognize more than one codon of m-RNA. This ph...

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  10. What becomes established from the wooble hypothesis

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  11. In order to enable a chemical to serve as a genetic material , it is e...

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  12. In the absence of beta- galactosides, transcription of

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  13. The complex CAP-c-AMP, which increases the affinity of RNA polymerase ...

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  14. If following is the sequence of nucleotides in mRNA , predict the sequ...

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  15. In a transcription unit, the activity of RNA polymerase at a given pro...

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  16. Which of the following statements is correct?

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  17. The gene, which producers mRNA has specific start and stop signals, wh...

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  18. RNA polymerase

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  19. UAA, UAG and UGA are known as non - sense codons because they

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  20. Genetic material is

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