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

• amino acids
• nucleotides
• fatty acids
• polysaccharides

The enzyme that unzips the DNA to prepare for replication

• helicase
• replicase
• polymerase
• synthase

DNA replication results in two DNA molecules,

• each one with two original strands
• each one with two new strands
• each one with one new strand and one original strand
• one with two new strands and the other with two original strands

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

• G1
• S
• G2
• M

Which of the following must happen first in order for DNA replication to occur?

• DNA polymerase binds to the leading strand

• DNA is unwound

• Hydrogen bonds form between bases

• chromosomes condense

Okazaki fragments form on the:

• lagging strand
• leading strand
• base-pairs
• 5' end

Which of the following is required for DNA replication to occur?

• DNA helicase
• DNA ligase
• DNA polymerase
• all of these

During replication, what enzyme adds complimentary bases?

• helicase
• synthesase
• ligase
• polymerase

Which enzyme is responsible for adding nucleotides to the free three prime end

• Helicase

• Topoisomerase

• DNA Polymersase 3

• DNA Polymersase 1

Which enzyme is responsible for forming phosphodiester bonds between the Okazaki fragments?

• Ligase

• Helicase

• DNA Polymerase 1

• DNA Polymerase 3