DNA Structure and Replication

The structure of DNA is a

• Double helix

• Single helix

• Straight molecule

• Long chain of amino acids

Which two bases are purines?

• Adenine and Guanine

• Guanine and Thymine

• Adenine and Thymine

• Guanine and cytosine

The scientist that formed the base pair rules was

• Rosalind Franklin

• James Watson

• Erwin Chargaff

• Francis Crick

What is this monomer?

• DNA

• Nucleotide

• Nitrogen base

• Phosphate

The type of bond that holds nitrogen bases together is a

• covalent bond

• ionic bond

• phosphate bond

• hydrogen bond

__________ used X-Ray crystallography to conclude that DNA is in the shape of a helix.

• Erwin Chargaff

• Rosalind Franklin

• James Watson

• Charles Darwin

The alternating molecules that make up the backbone of DNA are

• Sugars and bases

• Phosphates and bases

• Sugars and hydrogen bonds

• Phosphates and sugars

Determine the complementary strand of DNA for the following sequence:

TGT CAT

• TGT CAT

• CAT TGT

• AGA GTA

• ACA GTA

Which nitrogen bases are the pyrimidines?

• Adenine and Thymine

• Guanine and Uracil

• Cytosine and Thymine

• Guanine and Cytosine

DNA replication takes place during which phase of the cell cycle?

• S phase

• G 1

• G 2

• Mitosis