Home
Class 12
BIOLOGY
The correct sequence of different steps ...

The correct sequence of different steps of polymerease chain reaction is
1) annealing → denaturation → extension
2) denaturation → extension → annealing
3) denaturation → annealing → extension
4) extension → denaturation → annealing

A

1) annealing `rarr` denaturation `rarr` extension

B

2) denaturation `rarr` extension `rarr` annealing

C

3) denaturation `rarr` annealing `rarr` extension

D

4) extension `rarr` denaturation `rarr` annealing

Text Solution

Verified by Experts

The correct Answer is:
C

Polymerase chain reaction is a technique used to replicate a fragment of DNA so as to produce many copies of a particular DNA sequence. A single PCR amplification cycle involves three basic steps : denaturation, annealing and extension (polymerisation).
Promotional Banner

Similar Questions

Explore conceptually related problems

taq polymerase is used between annealing and denaturation during PCR.

The polymerase chain reaction is a technique used for 1) amplification of DNA 2) amplification of enzymes 3) amplification of proteins 4) all of these

There are two wires of the same material . Their radius and length are in the ratio 1:2 If the extension produced are equal, what is the ratio of the loads

Which of the following steps are catalysed by Taq polymerase in a PCR reaction ? (a) Denaturation of template DNA (b) Annealing of primers to template DNA (c) Extension of primer and on the template DNA (d) All of the above

In a polymerase chain reaction after the denaturation step why the mixture needs to cool down to a lower temperature ? a) To permit specific annealing of the primers b) To give a halt to the reaction mixture c) To increase the activity of enzyme Taq polymerase d) To obtain the multiple copies of the DNA

Two wires of the same material have their lengths in the ratio 3:2 , diameters in the ratio 3:2 and streching forces in the ratio 3:4 . What is the ratio of their extension

Process used for amplification or multiplication of DNA in DNA fingerprinting is 1) polymerase chain reaction 2) southern blotting 3) northern blotting 4) None of these

Two wires of different materials have lengths in the ratio 7 : 4 and Young's moduli in the ratio 7:9. If the ratio of diameters of the wires is 3:4, find the ratio of extensions produced when both wires are stretched by the same force .

Given flow chart represents different steps pf MOET. Study the flow chart carefully and select the correct answer for (1),(2) and (3).

Refer to the given graph showing relationship between temperature and enzyme action. Select the correct statement regarding 'A' and 'B'. (i) 'A' shows the rate at which reaction decreases due to denaturation of enzyme molecules. (ii) 'B' shows rate at which reaction increases due to decreased kinetic energy of substrate. (iii) As temperature rises, more and more enzyme molecules are denatured and 'A' appears to fall. (iv) 'B' shows rate at which reaction increases due to increased kinetic energy of substrate and enzyme molecules.