Unit 2 Exam: DNA Structure and Replication

During replication the DNA strand that is replicated continuously is known as the ____________________ strand.

• short

• leading

• lagging

• long

Which is the correct replicated DNA strand (Complimentary) for the sequence of DNA below?

DNA: TCA CGT TTG TGG CGT

• AGT GCA AAC ACC GCA

• TCA CGT TTG TGG CGT

• UCA CGU UUG UGG CGU

• AGU GCA AAC ACC GCA

The enzyme responsible for adding complimentary DNA nucleotides to the DNA template is _______________.

• Primase

• DNA Polymerase

• Helicase

• Ligase

The enzyme responsible for breaking bonds between nitrogen bases, “unzipping” the DNA strands during replication is _______________.

• DNA Polymerase

• Primase

• Helicase

• Ligase

Where in the cell does DNA replication take place?

• nucleus

• cytoplasm

• ribosome

• mitochondria

In DNA adenine bonds to thymine with _____ bonds.

• 2

• 3

• 4

• 5

Nitrogen bases with a two ring chemical structure are known as __________________________.

• Purines

• Pyrimidines

• Nucleotides

• Amino acids

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Tags

NGSS.MS-PS1-1

X outlines a(n) ___________.

• amino acid
• nitrogen base 
• nucleotide
• nitrogen base pair

Tags

NGSS.HS-LS1-1

Using the labels, identify the parts of a DNA molecule.

c

d

e

f

b

a

Deoxyribose

Hydrogen bond

Phosphate

Nucleotide

Nitrogen Base

Base pair

Tags

NGSS.HS-LS1-1