Which one is a true statement regarding DNA polymerase used in PCR?
1. | It is used to ligate introduces DNA in recipient cells |
2. | It serves as a selectable marker |
3. | It is isolated from a virus |
4. | It remains active at high temperatures |
The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents.
1. | A - Denaturation at a temperature of about 50ºC |
2. | C - Extension in the presence of heat-stable DNA polymerase |
3. | A - Annealing with two sets of primers |
4. | B - Denaturation at a temperature of about 98ºC separating the two DNA strands |