11. Which of the Following is a genetic vector ?
12. Restriction endonucleases are used in genetic engineering because -
A. They can degrade harmful proteins
B. They can join DNA fragments
C. They can cut DNA at specific base sequences
D. They can cut DNA at variable sites
Answer : Option D
13. Ideal host for the amplification of DNA molecules is
14. Ti Plasmid naturally occurs in
15. The sticky ends of Fragmented DNA molecules are made up of
16. Which of the following are the essential requirements for recombination ?
A. Single stranded DNA
B. DNA ligase
C. DNA Polymerase I
D. All of the above
Answer : Option B
17. The Plasmid derived from E.Coli is
18. Ti Plasmid is useful in
A. bringing new genes into animal cells
B. bringing new genes into plant cells
C. to nearly any sites on a chromosome
D. bringing tumour cells into plant cells
Answer : Option C
19. Many copies of a DNA molecule in a test tube are procurred by
A. Polymerase chain reaction (PCR)
B. Molecular chain reaction (MCR)
C. Ephemeral chain reaction (ECR)
D. All of these
Answer : Option A
20. Bam H I, ECo R I, Sal I are the types of
A. restriction endonucleasses
B. restraction endoxidases
C. restriction exonucleases
D. restriction polymerases
Answer : Option C