DNA Replication

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

• amino acids
• nucleotides
• fatty acids
• polysaccharides

What is the enzyme that unwinds the DNA to prepare for replication?

• helicase

• replicase

• DNA 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

order of replication

• 3, 4, 2, 1
• 3, 1, 4, 2
• 2, 1, 4, 3
• 3, 4, 1, 2

Tags

NGSS.HS-LS3-2

Which enzyme is responsible for adding nucleotides to the new strand of DNA?

• helicase

• DNA Polymerase

• ligase

• primase

Which series of steps is in the correct order?

1. Recoils

2. Straightens the double helix

3. Breaks hydrogen bonds

4. Adds free nucleotides

• 1, 2, 3, 4

• 3, 4, 2, 1

• 3, 2, 4, 1

• 2, 3, 4, 1

Based on the diagram, the enzyme (represented in gray) is most likely...

• DNA polymerase

• ligase

• primase

• helicase

Tags

NGSS.HS-LS1-1

Why does DNA replicate?

• To create another copy for the new cell

• To create a duplicate copy in case the original gets damaged

• To create a new copy to replace the damaged original

• To correct mutations that occurred previously

What will the first four bases of the new DNA strand look like if copying the template strand?

• TGGT
• ACCA
• GTTG
• CAAC

What is/are the function(s) of DNA polymerase?

• connects nucleotides (in the new strand) through covalent bonds

• matches the template nucleotides with free nucleotides

• proofreads

• It does all of these functions