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. During DNA synthesis formed segment is:

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

4. Which one is mainly transcribed:

5. Okazaki fregments is:

6. The sequence of structural genes in lac operon is

7. Nitrogenous bases present in DNA:

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

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

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

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

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

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

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

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

16. In DNA helix:

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

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

19. DNA double helix model was given by:

20. Histone proteins are