Molecular Basis of Inheritance Class 12 MCQs Questions with Answers

1. In some viruses, DNA is synthesised by using RNA as template. Such a DNA is called

2. Which one is mainly transcribed:

3. In DNA helix:

4. Okazaki fregments is:

5. The three codons which result in the termination of polypeptide chain synthesis are

6. During transcription, the site of DNA molecule at which RNA polymerase binds is called

7. The sequence of structural genes in lac operon is

8. Nitrogenous bases present in DNA:

9. DNA double helix model was given by:

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

11. The mutations that involve addition, deletion or substitution of a single pair in a gene are referred to as

12. In DNA strand, the nucleotides are linked together by

13. During DNA synthesis formed segment is:

14. The process of copying genetic information from one strand of DNA to RNA is termed as _________ .

15. The net electric charge on DNA and histone, is

16. The strand of DNA that forms mRNA is called?

17. In transcription in eukaryotes, heterogenous nuclear RNA (hnRNA) is tmascribed by

18. DNA fragments are joined in a correct sequence by :

19. If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it ?

20. Histone proteins are