Tag: cutting, insertion and ligation of dna

Questions Related to cutting, insertion and ligation of dna

DNA is amplified by __________________.

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. PCR technique

  2. Southern Blotting technique

  3. Northern Blotting technique

  4. Nucleic acid hybridization technique

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Correct Option: A

Which one of the following enzymes is used in PCR reaction?

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. Taq polymerase

  2. RNA polymerase

  3. Rib nuclease

  4. End nuclease

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Correct Option: A

Polymerase chain reaction technique is used for.

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. DNA amplification

  2. Screening gene libraries

  3. Synthesis of polymerase

  4. DNA sequencing

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Correct Option: A

The $C _2$ glycolate cycle is also known as.

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. PCR

  2. PCO

  3. PPP

  4. EMP

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Correct Option: A

If the initial number of template DNA molecules in a PCR reaction is $1000$, the number of product DNA molecules at the end of $20$ cycles will be closest to.

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. $10^3$

  2. $10^6$

  3. $10^9$

  4. $10^{12}$

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Correct Option: C

How many cycles of PCR are required if desired number of DNA molecules is 64 and starting material is single stranded DNA instead of ds DNA ?

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. 5

  2. 64

  3. 7

  4. 30

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Correct Option: A

Which does not describe a function of the DNA polymerase molecule?

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. Recognise the free nucleotide that pairs with the base on the template strand of DNA

  2. Read the strand of template DNA and recognise the base there

  3. Proofread to ensure that the proper base has been incorporated

  4. Make the proper nucleotide to match with the base read on the template strand

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Correct Option: D
Explanation:

DNA polymerase is an enzyme that synthesizes DNA molecules from deoxyribonucleotides, the building blocks of DNA. The function of DNA polymerase is to replicate, proofread and repair DNA.DNA polymerases add nucleotide bases only when an RNA primer, a short piece of RNA, is already present. 

So, the correct option is 'Make the proper nucleotide to match with the base read on the template strand'.

To carry out a polymerase chain reaction (PCR), one must have the catalytic DNA polymerase and

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. a blueprint or gene map of the sequence one wish to copy

  2. a number of primers from either side of the target DNA in order to get the polymerase replication process- going

  3. a DNA synthesizer machine

  4. a DNA probe

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Correct Option: B
Explanation:

Polymerase Chain Reaction is a method widely used to make many copies of a specific DNA segment. Using PCR, a single (or more) copy of a DNA sequence is exponentially amplified to generate thousands to millions of more copies of that particular DNA segment. Components of PCR include DNA template, DNA polymerase, two DNA primers, nucleotides.

So, the correct option is 'a number of primers from either side of the target DNA in order to get the polymerase replication process-ongoing'.

What is the function of the polymerase chain reaction in genetic engineering?

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. Cut DNA into many fragments

  2. Carry DNA into a new cell

  3. Link together newly joined fragments of DNA

  4. Make millions of copies of a specific segment of DNA

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Correct Option: D
Explanation:

Polymerase Chain Reaction is a method widely used to make many copies of a specific DNA segment. Using PCR, a single (or more) copy of a DNA sequence is exponentially amplified to generate thousands to millions of more copies of that particular DNA segment.

So, the correct option is 'Make millions of copies of a specific segment of DNA'.

In the $PCR$ technology the $DNA$ segment is replicated over a billion times. This repeated replication is catalyzed by the enzyme.

bio-chemistry applications of biotechnology pcr cutting, insertion and ligation of dna gene cloning procedure biotechnological regulations asexual modes of reproduction

  1. $DNA$ polymerase

  2. Taq polymerase

  3. $DNA$ dependent $RNA$ polymerase

  4. Primase

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Correct Option: B
Explanation:
Taq polymerase is a thermostable DNA polymerase named after the thermophilic bacterium Thermus aquaticus from which it was originally isolated by Chien et al. in 1976. Its name is often abbreviated to Taq Pol or simply Taq. It is frequently used in the polymerase chain reaction (PCR), a method for greatly amplifying the quantity of short segments of DNA.

T. aquaticus is a bacterium that lives in hot springs and hydrothermal vents, and Taq polymerase was identified as an enzyme able to withstand the protein-denaturing conditions (high temperature) required during PCR. Therefore, it replaced the DNA polymerase from E. coli originally used in PCR. Taq's optimum temperature for activity is 75–80 °C, with a half-life of greater than 2 hours at 92.5 °C, 40 minutes at 95 °C and 9 minutes at 97.5 °C, and can replicate a 1000 base pair strand of DNA in less than 10 seconds at 72 °C.

So the correct option is 'Taq polymerase'.