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Consider the following statements : A....

Consider the following statements :
A. RNA has evolved from DNA with chemical modification that make it more unstable.
B. Central dogma in molecular biology states that the genetic information flows from DNA `rarr` RNA `rarr` Protein.
C. In some virsus like tobacco mosaic viruses, QB bacteriophage, DNA is the genetic material.
D. Euchromatin is said to be transcriptionally active chromatin, whereas heterochromatin is inactive.
Of the above statements :

A

B and C are correct

B

B and D are correct

C

A and B correct

D

A and D are correct

Text Solution

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The correct Answer is:
B
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The central dogma of molecular genetics states that the genetic information flows from

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Assertion : RNA being a catalyst was reactive and hence unstable. Reason : DNA has evolved from RNA with chemical modifications that make it more stable.

GRB PUBLICATION-GENE EXPRESSION AND REGULATION-NCERT Corner(Exemplar Problems)
  1. To initiate translation, the mRNA first binds to

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  2. In E. coli, the lac operon gets switched on when

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  3. A diagrammatic representation of the central dogma in molecular biolog...

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  4. Diagrammatic view of a dinucleotide is given below. Identify A,B and D...

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  5. Read the following five statements (A to E) about nucleic acids and se...

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  6. Diagram of a nucleosome is given below. Identify A, B and C by selecti...

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  7. Which one of the following statements is wrong ?

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  8. Schematic structure of a transcription uit is given below. Select the ...

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  9. A diagrammatic view the Hershey-Chase experiment is given below. Ident...

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  10. Watson-Crick model for DNA replication is given below. Identify the mo...

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  11. Consider the following statements : A. RNA has evolved from DNA with...

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  12. The following diagram shows the lac Operon in the absence of inducer: ...

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  13. Identify the molecule shown below :

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  14. Consider the following statements with respect to translation. A. Tr...

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  15. Which one of the following statements is incorrect?

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  16. Initiation step during the process of transcription in bacteria is sho...

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  17. Process of transcription in eukaryotes is given below. Identify A,B,C ...

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  18. Which of the following statement/s regarding nucleic acids is/are wron...

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  19. Select the correct option :

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  20. Which of the following statements about the t-RNA is not true?

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