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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

B

I and II

C

I, II and III

D

II and III

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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.

ARIHANT NEET-GENE, ITS EXPRESSION AND REGULATION-Chapter Exercise (C) Medical entrance s gallery
  1. The process of removal of introns and joining of exons is called :

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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. In the lac operon system, beta-galactosidase is coded by

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

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  6. 5' end of a polynucleotide chain contains

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  7. Reverse transcriptase is

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  8. During chain elongation, peptide bond is formed between carboxyl group...

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  9. How many effective codons are there for the synthesis of twenty amino ...

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  10. Whose experiments cracked the DNA and discobered unequivocally that a ...

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  11. The functional unit of DNA molecule that codes for a particular gene p...

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  12. Which one of the following pairs of codons is correctly matched with t...

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  13. Which one of the following pairs is correctly matched with regard to t...

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  14. Assertion (A) : Replication and transcription occur in the nucleus but...

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  15. All eukaryotic genes contain two kinds of base sequences. Which of the...

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  16. Which of the following is an initiation codon in

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  17. During transcription, if the nuncleotide sequence of the DNA strand th...

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  18. Process of reverse transcription was discovered by

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  19. The process of formation of amino acids is called

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  20. One of these is associated with terminator codon?

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