Question

Select all of the statements that correctly describe DNA structure:

Group of answer choices

The pyrimidine and purine bases are located on the outside of the double helix.

The sugars and phosphate groups are located on the exterior of the helix.

Base pairing will always be between a purine base and a pyrimidine base.

Two connected DNA strands will be oriented in the same direction.

Hydrogen bonds will hold two DNA strands together.

Answer 1

1. Hydrogen bonds will hold two DNA strands together.
2. The sugars and phosphate groups are located on the exterior of the helix.
3. Base pairing will always be between a purine base and a pyrimidine base.

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