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Consider the statements (i) rRNA provi...

Consider the statements
(i) rRNA provides template for synthesis of proteins
(ii) tRNA brings amino acids and reads genetic code
(iii) RNA polymerase binds to promoter and initiates transcription
(iv) A segment of DNA coding for polypeptide is called intron

A

I and III are correct

B

I and II are correct

C

I, I and III are correct

D

II and IIl are correct

Text Solution

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The correct Answer is:
D
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Consider the following statements (A). r-RNA provides the template for synthesis of proteins (B) tRNA brings amino acids and reads the genetic code (c ) RNA polymerase binds to promother and initiates transcription (D) A segment of DNA coding for polypeptide is called intron

The ( a) provides the template, (b) brings amino acids and reads the genetic code , and (c) play structure and catalytic role during translation.

Assertion : All three ENAs (mRNA, tRNA and rRNA) are needed to synthesise a protein in a cell. Reason : The mRNA provides the template, RNA brings aminoacids and reads the genetic code, and tRNA play structural and catalytic role.

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.

Read the following statements carefully and choose the correct statements. A. In a transcription unit, the promoter located at the 5' end of coding strand B. The single strand DNA having the polarity 5' rarr 3' is the template strand C. RNA polymerase binds to the operator during transcription. D. Single base DNA differences occur in humans are called Single Nucleotide Polymorphism (SNPs).

Consider the following statements. I. DNA or RNA , II. Proteins III. Lipids, IV. Carbohydrates Virus is an infectious agent which may consist of

Following are the stages in the cellular synthesis of a protein. I. Movement of mRNA from the nucleus to cytoplasm. II. Linking of adjacent amino acid molecules. III. Transcription of mRNA from a DNA template. IV. Formation of the polypeptide chain. V. Attachment of the mRNA strand to a ribosome. In which order do these stages take place?

Arrange the following steps in correct order: (TRANSCRIPTION): (I) The nascent RNA separates and RNA polymerase also detaches and thus terminates the process of transcription. (II)RNA polymerase loses the factor, but continues to add ribonucleotides to form RNA. (III) Binding of RNA polymerase to the promoter and its association with initiation factor (sigma) . (IV) The RNA polymerase associates with termination-factor (rho) transiently to stop the transcription process.

MODERN PUBLICATION-MOLECULAR BASIS OF INHERITANCE -COMPETITION FILE OBJECTIVE TYPE QUESTIONS (Multiple Choice Questions (MCQs) :)
  1. In the lac operon system, beta-galactosidase is coded by

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  2. The process of copying genetic information from one strand of DNA to ...

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  3. Consider the statements (i) rRNA provides template for synthesis of ...

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  4. During Meselson and Stahl' experiments, heavy DNA was distinguished fr...

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  5. The process of removal of introns and joining of exons is called :

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  6. In bacteria, the formation of peptide bond during translation is effec...

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  7. Location or sites in the human DNA where single base DNA differences o...

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  8. The 3'-5' phosphodiester linkages inside a polynucleotide chain serve ...

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  9. In transcription in eukaryotes, heterogenous nuclear RNA (hnRNA)is tra...

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  10. Non-proteinaceous enzyme that acts as a catalyst for the formation of ...

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  11. In lac operon i gene codes for :

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  12. Which one of the following have dual function ? It codes for methionin...

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  13. Menthyl guanosine triphosphate is added to the 5' end of hnRNA in a pr...

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  14. A typical nucleosome contains :

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  15. In the clotting mechanism pathway , thrombin activates factors

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  16. House-keeping proteins occur in

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  17. Which of the following statement about colour blindness is correct

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  18. A mixture containing DNA fragments A,B,C and D, with molecular weights...

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  19. Which of the following DNA sequence qualifies to be designted as a pal...

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  20. If the total amount of adenine and thymine in a double stranded DNA is...

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