DNA Replication & Fingerprinting

The enzyme that unzips the DNA to prepare for replication

• helicase
• replicase
• polymerase
• synthase

A scientist observes a base sequence of AGCTAGCTAGCT.  Which of the following would be the complimentary strand?

• TGCATGCATGCA
• TCGATCGATCGA
• TAGCTAGCTAGC
• TTAAGGCCTTCC

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

• G1
• S
• G2
• M

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.

Which enzyme seals okazaki fragments together on the lagging strand?

• Topoisomerase
• Helicase
• Polymerase
• Ligase

The separation of the two single strands of DNA creates a ‘Y’ shape?

• enzyme

• unzip

• A replication fork

Which enzyme proofreads and removes RNA Primase

• Ligase

• Polymerase 1

• Polymerase 3

• Helicase

The two strands of DNA are held together by:

• Hydrogen Bonds
• Phosphodiester Bonds
• Glycolsyl Bonds
• Glycosidic Linkages

Tags

NGSS.HS-LS1-1

Who's work concluded that the %A=%T  and %G=%C

• Chargaff
• Meischer
• Levene
• Hammerling

DNA replication was proved by the experiments of:

• Hershey & Chase
• Meselson & Stahl
• Watson & Crick
• Franklin & Gosling