DNA History, Structure, Replication, and Protein Synthesis

Which of the following units are repeatedly joined together to form a strand of DNA?

• amino acids
• nucleotides
• fatty acids
• polysaccharides

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Which sequence of DNA bases would pair with this partial strand?
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

The enzyme that unzips the DNA to prepare for replication

• helicase
• replicase
• polymerase
• synthase

The enzyme that adds more nucleotides to the complementary strands in DNA replication

• helicase

• primase

• DNA polymerase

• ligase

Which 2 molecules forms the sides (backbone) of the DNA ladder?

• deoxyribose and adenine
• deoxyribose and a hydrogen bond
• sugar and the nucleus
• deoxyribose (sugar) and phosphate

Tags

NGSS.HS-LS1-1

For what reason does DNA copy itself?

• to replace worn out DNA
• so cells can divide
• to export DNA to other parts of the body
• more DNA is better

Tags

NGSS.HS-LS1-4

This image shows that DNA Replication is _______.

• Conservative
• Semiconservative
• Dispersive
• Spontaneous

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein

In what phase of the cell cycle does DNA replication take place?

• Interphase (G1)

• Interphase (S)

• Interphase (G2)

• Mitosis