Which of the following statements is true?
Question 1 options:
a) DNA renaturation takes longer than |
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a) DNA renaturation and denaturation take about the same amount of time. |
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a) DNA denaturation is irreversible. |
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a) DNA renaturation requires an input of energy. |
Option (a) is correct : DNA renaturation takes longer than denaturation.
DNA denaturation or melting is defined as separation of two strands of DNA to form single strands. DNA renaturation is a spontaneous reversible process, and is performed under controlled conditions of pH and ionic strength. Also, the temperature has to be gradually decreased, because of which renaturation is a slow process. The rate of renaturation depends on the type of sequence present in the DNA strand, unique sequences take more time to reanneal than do repetitive sequences.
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