Chapter 12- Biotechnology and its Application (Part- 2 )
1. Which of the following is not a function of telomeres?
- Preventing DNA damage
- Protecting the ends of chromosomes
- Facilitating replication of linear chromosomes
- Regulating gene expression
- 4 Clear All
2. The enzyme telomerase is responsible for:
- DNA replication
- Repairing DNA damage
- Telomere shortening
- Extending telomeres
- 4 Clear All
3. Which of the following is not involved in DNA proofreading and repair?
- DNA polymerase
- Exonucleases
- Mismatch repair enzymes
- Primase
- 4 Clear All
4. The process of DNA replication is considered semiconservative because:
- The two resulting DNA molecules are identical to the original DNA molecule
- Each resulting DNA molecule contains one strand from the original DNA molecule and one newly synthesized strand
- The two resulting DNA molecules are different from the original DNA molecule
- Each resulting DNA molecule contains only newly synthesized strands
- 2 Clear All
5. The removal of RNA primers and joining of DNA fragments during DNA replication is catalyzed by:
- DNA helicase
- DNA polymerase I
- DNA polymerase III
- Ligase
- 4 Clear All
6. The correct order of enzymes involved in DNA replication is:
- Primase, DNA polymerase III, DNA polymerase I, ligase
- DNA polymerase I, DNA polymerase III, primase, ligase
- Primase, ligase, DNA polymerase III, DNA polymerase I
- DNA polymerase III, primase, DNA polymerase I, ligase
- 1 Clear All
7. The enzyme responsible for proofreading DNA during replication is:
- DNA helicase
- DNA polymerase I
- DNA polymerase III
- Exonuclease
- 4 Clear All
8. Which of the following is not a feature of DNA replication in prokaryotes?
- Multiple replication origins
- Bidirectional replication
- Involvement of telomerase
- Faster replication rate
- 3 Clear All
9. The removal of mismatched bases and their replacement during DNA replication is known as:
- Proofreading
- Mismatch repair
- DNA synthesis
- Telomere extension
- 2 Clear All
10. The enzyme responsible for synthesizing RNA primers on the lagging strand during DNA replication is:
- DNA helicase
- DNA polymerase I
- DNA polymerase II
- Primase
- 4 Clear All