Honors unit 6 quiz1

The enzyme that unzips the DNA to prepare for replication

• helicase

• replicase

• polymerase

• synthase

Which enzyme stabilizes DNA for replication so that it doesn't tangle or overwind.

• polymerase
• ligase
• topoisomerase

• helicase

Which enzyme is only used on the lagging strand during replication?

• DNA ligase
• DNA polymerase

• Helicase
• DNA polymerase

To what part of the DNA nucleotide does the Nitrogen base attach?

• phosphate
• hydrogen
• carbon
• sugar

Which enzyme creates the new sides of the DNA molecule by pairing A-T and G-C?

• polymerase

• ligase

• helicase

• topoisomerase

The two DNA strands are held together by

• nitrogen bonds between the bases

• hydrogen bonds between the bases

• covalent bonds between the bases

• hydrogen bonds between the sugar and phosphate

Prokaryotic DNA is __________and ___________

• circular and in the nucleus

• circular and in the cytoplasm

• larger and contains more genes than eukaryote

• linear and in the nucleus

Letter A in this diagram shows the_______ and letter D shows the ________

• deoxyribose sugar; nucleotide

• phosphate; nucleotide

• phosphate; sugar

• nitrogen base; nucleotide

Tags

NGSS.HS-LS1-1

The area C represents a _______that would be held by a _________bond to the arrow shape across from it

• nitrogen base; covalent

• nitrogen base; hydrogen

• phosphate; covalent

• phosphate; hydrogen

Tags

NGSS.HS-LS1-1

What are the three parts of a nucleotide?

• Adenine, guanine and thymine

• phosphates, carbohydrates and lipids

• bases, acids and neutrals

• sugar, phosphate and nitrogen base