DNA PS

Before a cell divides, its DNA must first ____

• be copied.

• be joined.

• be completed.

• be isolated.

Base pairing in the double helix explains how DNA can be copied because each base on one strand pairs with ____ .

• one base on the opposite strand

• one base on the same strand

• all the bases in the DNA

• the replication fork

Each strand of the double helix has ____ of the information needed to reconstruct the other half by the mechanism of base pairing.

• all

• none

• some

• the essential parts

Because each strand can be used to make the other strand, the strands are said to be ______.

• complimentary

• supplementary

• equal

• twin

Before a cell divides, it duplicates its DNA in a copying process called ______.

• replication

• duplication

• synthesization

• polynation

Tags

NGSS.HS-LS3-2

Before a cell divides, it duplicates its DNA in a copying process called replication during the ___ phase of the cell cycle.

• S

• C

• P

• K

During replication, the two strands of each DNA molecule ____.

• separate

• join together

• chemically change

• physically change

During replication, after the two strands separate, the two new complementary strands are then ____ following the rules of base pairing.

• synthesized

• joined

• copied

• unwound

During replication, each strand of the double helix of DNA serves as a ____ for the new strand.

• template

• cohort

• energy source

• axis

DNA replication is _____, which means that each DNA molecule resulting from replication has one of the two original strands and one new strand.

• semiconservative

• conservative

• expansive

• cohorting