761. Specialized transduction occurs when
A. the bacteriophage incorporates randomly in the bacterial chromosome
B. the bacteriophage never incorporates into the bacterial chromosome
C. the bacteriophage always incorporates at the same position in the bacterial chromosome
D. none of the above

762. PCR is used
A. to diagnose genetic diseases
B. to solve crimes
C. to study gene function
D. all of these

763. To clone into a plasmid vector, both the plasmid and the foreign DNA are cut
A. with the same restriction enzyme and mixed together
B. with different restriction enzyme and mixed together
C. with the combination of enzymes and then seperated
D. with the combination of enzymes and mixed together

764. PCR can be used to amplify a specific fragment of DNA from which of the following?
A. A drop of blood
B. A hair follicle
C. A fragment of skin
D. All of these

765. Restriction maps
A. allows comparison between DNA molecules without the need to determine nucleotide sequence
B. allows comparison between DNA molecules but requires to determine nucleotide sequence
C. does not allow comparison between DNA molecules
D. none of the above

766. A PCR cycle consists of
A. three steps, denaturation, primer annealing and elongation
B. three steps, denaturation, initiation and elongation
C. three steps, primer annealing, elongation and termination
D. three steps, initiation, elongation and termination

767. How many ds DNA molecule can be produced, which comprise precisely the target region in double strand form during 4th cycle of PCR?
A. Two ds DNA molecule
B. Three ds DNA molecule
C. Eight ds DNA molecule
D. Four ds DNA molecule

768. PCR can be used in
A. cloning
B. sequencing
C. medical diagnosis and forensic medicine
D. all of the above

769. PCR (Polymerase Chain Reaction) can make multiple copies of
A. DNA
B. RNA
C. protein
D. carbohydrate

770. PCR is an abbreviation for
A. Protein Change Reaction
B. Polymerase Chain Reaction
C. Positive Charge Reaction:
D. Preliminary Change Rate

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