Recombinant Dna

Enzymes that recognize and cleave specific 4 to 8 base pair sequences of DNA are

A:

DNA ligase

B:

helicases

C:

restriction endonucleases

D:

DNA gyrase

Answer: C

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A short molecule containing 2-20 nucleotide is

A:

plasmid

B:

vector

C:

oligonucleotide

D:

mononucleotide

Answer: C

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Which of the following is not commonly used as vector?

A:

Artificial chromosome

B:

Cosmid

C:

Fungi

D:

Plasmid

Answer: C

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What is the normal role of restriction endonucleases in bacterial cells?

A:

To degrade the bacterial chromosome into small pieces during replication

B:

To degrade invading phage DNA

C:

To produce RNA primers for replication

D:

All of the above

Answer: B

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Which of the following is obtained using processed mRNA molecules as a template?

A:

rDNA

B:

mDNA

C:

cDNA

D:

tDNA

Answer: C

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Questions for: Recombinant Dna