Bio - Technology — Biology MCQs (Class 12)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
Page 2 of 4
#9 Enzyme that transcribes DNA from RNA is called
A) Reverse transcriptase
B) DNA polymerase
C) Taq polymerase
D) RNA polymerase
#10 For what purpose is the polymerase chain reaction used?
A) To cut DNA
B) To join DNA sequences
C) To amplify DNA sequences
D) To clone cells
#11 Which of the following procedures would produce RFLPs?
A) Incbating DNA nucleotides with DNA polymerase
B) Incubating a mixture of single stranded DNA from two closely related species
C) Incubating DNA with restriction enzyme
D) None of these
#12 Restriction enzymes are molecular scissors used in genetic engineering to cut up DNA. In nature where restriction enzymes found and what is their natural role
A) In viruses; to splice host cell DNA
B) In bacteria; to defend against viral invasion
C) In yeast cell; to defend against foreign DNA
D) In viruses; to defend against mutation
#13 A method used to detect a particular DNA sequence within a mixture of many DNA fragments is
A) DNA sequencing
B) DNA finger printing
C) Colony hybridization
D) Southern blotting
#14 When bacteria are genetically engineered to produce human insulin; the enzymes used in the procedure are:
1) Ligase
2) Restriction endonuclease
3) Reverse transcriptase.
In which order are the enzymes used?
A) 1-3-2
B) 2-3-1
C) 2-1-3
D) 3-2-1
#15 Restriction fragment length polymorphism (RFLPs)
A) Are achieved by using restriction enzymes
B) Identify individuals genetically
C) Are the basis for DNA finger - printing
D) All the above are correct
#16 Gel most commonly used for short fragment DNA electrophoresis is
A) Agarose
B) Polyacrylamide
C) DNA polymerase
D) DNA ligase
Page 2 of 4
Register or Login for comments
Comments: