AP Biology Topic 7

Enzymes responsible for sealing phosphodiester linkage

• Helicase

• Ligase

• Polymerase

• Topoisomerase

Enzymes responsible for relieve strand of double helix

• Helicase

• Ligase

• Polymerase

• Topoisomerase

Enzymes responsible for breaking H bonds between strands

• Helicase

• Ligase

• Polymerase

• Topoisomerase

Enzymes responsible for synthesis of new DNA

• Helicase

• Ligase

• Polymerase

• Topoisomerase

DNA is...

• Antiparallel

• Parallel

Which enzyme connects the Okazaki fragments (lagging)

• Helicase

• Ligase

• Polymerase

• Topoisomerase

What is at the 5’ end of DNA?

• Hydrogen

• Hydroxyl

• Nitrogenous Base

• Phosphate

What is at the 3’ end of DNA?

• Hydrogen

• Hydroxyl

• Nitrogenous Base

• Phosphate

Describe the directionality of DNA

• Antiparallel

• Parallel

• Perpendicular

• Single Stranded 5’ to 3’

What enzyme is responsible for synthesizing RNA start?

• DNA polymerase

• Helicase

• Ligase

• Primase