Transcription, Genetic Code and Types of RNA, Class 12 Biology Sample Papers

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Removal of the introns and joining of the exons in a defined order in a transcription unit is called

  Capping

  Transformation

 Tailing

 Splicing

Question 1 of 10

2. During transcription, the DNA site at which RNA polymerase binds is called

 Enhancer

 Receptor

 Promoter

 Regulator

Question 2 of 10

3. The coding segment of DNA is

 Muton

 Replicon

 Intron

 Exon

Question 3 of 10

4. Some amino acids are coded by more than one codon; hence, the code is

 Unambiguous

 Universal

 Degenerate

 Initiator

Question 4 of 10

5. Out of 64 codons, the number of codons with GGG is

 4

 1

 2

 6

Question 5 of 10

6. Control of gene expression takes place at the level of

 DNA replication

 Transcription

 Translation

 None of these

Question 6 of 10

7. The amino acid attaches to the tRNA at its

 5′ end

 Anticodon site

  3′ end

 DHU loop

Question 7 of 10

8. The portion of DNA which contains information for an entire polypeptide is called

 Operon

 Recon

 Muton

 Cistron

Question 8 of 10

9. Which of the following steps in transcription is catalysed by RNA polymerase?

  Initiation

  Elongation

  Termination

  All of the above

Question 9 of 10

10. DNA element with the ability to change its position is called

 Cistron

  Intron

 Recon

 Transposon

Question 10 of 10

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