Question:
The base sequence in one of the strands of DNA is: ‘TAGCATGAT’
- Give the base sequence of its complementary strand.
- How are these base pairs held together in DNA molecule?
- Explain the base complementarity rule. Name the scientist who framed this rule.
The base sequence in one of the strands of DNA is: ‘TAGCATGAT’
- Give the base sequence of its complementary strand.
- How are these base pairs held together in DNA molecule?
- Explain the base complementarity rule. Name the scientist who framed this rule.
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A–T have 2 hydrogen bonds, C–G have 3. Chargaff's rule explains DNA base pairing.
Updated On: Jun 20, 2025
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Solution and Explanation
- The complementary strand of TAGCATGAT is: ATCGTACTA
- These base pairs are held together by hydrogen bonds — adenine (A) pairs with thymine (T) via 2 hydrogen bonds, and cytosine (C) pairs with guanine (G) via 3 hydrogen bonds.
- The base complementarity rule states that A pairs with T and C pairs with G in DNA. This rule was framed by the scientist Erwin Chargaff.
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