DNA structure, replication and history

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

• amino acids
• nucleotides
• fatty acids
• polysaccharides

The enzyme that unwinds 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

A process in which DNA has the unique ability to make an exact copy of itself.

• Replication
• Translation
• Transcription

Tags

NGSS.HS-LS3-2

Which enzyme is responsible for adding nucleotides?

• Topoisomerase
• DNA Polymerase
• Ligase
• Primase

The process of DNA replication is called semi conservative because it results in

• none of these
• Two DNA molecules.  One original molecule and one with two new strands
• two exact copies with new strands
• two identical molecules, each with 1 original strand and one new.

Based on the diagram, how many origins of replication are represented?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-LS3-2

Place the following in sequential order
1. Recoil
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

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

Which of the following does DNA polymerase NOT do?

• connects nucleotides (in the new strand) through covalent bonds
• Matches the template nucleotides with free nucleotides
• proofreads
• It does all of these functions