Question
Download Solution PDFWhich is the correct base pairing found in a normal DNA molecule?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Base Pairing in DNA
- DNA (Deoxyribonucleic Acid) is a double-stranded molecule, where the two strands are held together by base pairing between complementary nitrogenous bases.
- The four nitrogenous bases in DNA are:
- Adenine (A)
- Thymine (T)
- Guanine (G)
- Cytosine (C)
- The base pairing follows a specific rule known as Chargaff's Rule:
- Adenine (A) pairs with Thymine (T) through two hydrogen bonds.
- Guanine (G) pairs with Cytosine (C) through three hydrogen bonds.
EXPLANATION:
- Adenine pairs with Thymine - This is correct because adenine always pairs with thymine in a normal DNA molecule.
- Adenine pairs with Guanine - This is incorrect because adenine never pairs with guanine.
- Adenine pairs with Cytosine - This is incorrect because adenine never pairs with cytosine.
- Thymine pairs with Guanine - This is incorrect because thymine never pairs with guanine.
Based on the base pairing rules, the correct answer is: Adenine pairs with Thymine.
Therefore, the correct base pairing found in a normal DNA molecule is that Adenine pairs with Thymine.
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