Structure of DNA

What is the structure of DNA that James Watson and Francis Crick deduced?

_____ _____ model

Each DNA molecule consists of two _____ _____.

In DNA, what will twist around each other to form double helix structure?

_____ strands

What we call the two strands that run inopposite direction?

_____ strands

What is the bond between the nitrogenous base?

_____ bond

Two poly peptide strands are held together by hydrogen bonding between bases in opposite strands is also know as?

_____ _____

The base pairing is _____, hence adenine is linked to thymine, cytosine is linked to guanine.

Since the bases are complementary to each other, so we call them _____ _____ _____

_____ is linked to _____ by 2 hydrogen bonds.

_____ is linked to _____ by 3 hydrogen bonds.

• adenine; thymine;

  cytosine; guanine

• adenine; cytosine; thymine; guanine

• guanine; thymine; cytosine; adenine

• guanine; cytosine; thymine; adenine