DNA Base Pairing & Replication — NEET Biology
📚 Practice ConceptThe base pairing confers a very unique property to the polynucleotide chains. They are said to be complementary to each other, and therefore if the sequence of bases in one strand is known then the sequence in other strand can be predicted. Also, if each strand from a DNA (let us call it as a parental DNA) acts as a template for synthesis of a new strand, the two double stranded DNA (let us call them as daughter DNA) thus, produced would be identical to the parental DNA molecule. Because of this, the genetic implications of the structure of DNA became very clear.
Assertion (A): The sequence of one DNA strand can be predicted if the other strand’s sequence is known. Reason (R): Base pairing confers complementarity between the two polynucleotide chains.
View solution & NCERT explanation
Correct answer: A — If both assertion and reason are true and the reason is the correct explanation of the assertion.
NCERT states “if the sequence of bases in one strand is known then the sequence in other strand can be predicted” making the Assertion true. NCERT explains “The base pairing confers a very unique property to the polynucleotide chains. They are said to be complementary to each other” - the Reason explains WHY prediction is possible through complementary base pairing.
What does NCERT say about base pairing confers very?
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