NEETZoologyMolecular Basis of Inheritance
Characteristics Description A. DNA Backbone 1. Uniform distance maintained between two strands due to base pairing B. Antiparallel Strands 2. Composed of sugar and phosphate groups C. Base Pairing 3. Strands oriented in opposite directions (5' to 3' and 3' to 5') D. Hydrogen Bonds 4. Stabilizes the DNA double helix by forming base pairs
Options
- AA - 2, B - 3, C - 1, D - 4
- BA - 4, B - 1, C - 2, D - 3
- CA - 1, B - 2, C - 4, D - 3
- DA - 3, B - 4, C - 1, D - 2
Correct answer
A. A - 2, B - 3, C - 1, D - 4
Step-by-step solution
A - 2: The DNA backbone is composed of sugar and phosphate groups. B - 3: DNA strands have antiparallel orientation, meaning one runs 5' to 3' and the other 3' to 5'. C - 1: Base pairing between adenine-thymine and guanine-cytosine maintains a uniform distance between the two DNA strands. D - 4: Hydrogen bonds between bases stabilize the DNA double helix.