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Must Know High School Biology

Kellie Ploeger Cox

Chapter 10

Replication of DNA - all with Video Answers

Educators


Chapter Questions

03:05

Problem 1

What must occur before a cell divides?

Dr. Anas Syed
Dr. Anas Syed
Numerade Educator
04:07

Problem 2

The double-helical structure of DNA is antiparallel. This means that the $3^{\prime}$ end of one strand (which has a group hanging off of it) must line up with the end of the complementary strand (which has a phosphate group hanging off of it).

James Thierer
James Thierer
Numerade Educator
01:35

Problem 3

Which strand needs multiple RNA primers in order for DNA polymerase to create a complementary copy: leading strand or lagging strand?

Ramesh Singh
Ramesh Singh
Numerade Educator
01:53

Problem 4

Free nucleotides are added to a growing strand of DNA through a reaction, which creates a new bond.

Joshlyn Resek
Joshlyn Resek
Numerade Educator
01:49

Problem 5

Why, exactly, can DNA polymerase only attach free nucleotides to the $3^{\prime}$ end of a growing DNA molecule?

Anand Jangid
Anand Jangid
Numerade Educator
02:02

Problem 6

Fill in the blanks with the correct term: DNA polymerase, helicase, ligase, primase, single-stranded binding proteins.
a. The enzyme unwinds and unzips DNA in order for replication to occur.
b. The enzyme must first synthesize a small piece of RNA in order for another enzyme to begin adding DNA nucleotides to the growing strand.
c. Once DNA is unzipped, stick to the unpaired bases in order to keep the two strands apart.
d. The enzyme ___ glues together fragments of newly synthesized DNA by creating new phosphodiester bonds.
e. The bulk of the work of creating a new strand of DNA is done by , the enzyme responsible for pairing up complementary nucleotides.

JS
Jeremy Spiro-Winn
Numerade Educator
02:18

Problem 7

What are the two reasons DNA must be double stranded?

Shiksha Dutta
Shiksha Dutta
Numerade Educator
01:41

Problem 8

Which of the following statements correctly describes the semiconservative model of DNA replication? Once DNA is copied, it will have:
a. Two strands, both from the original DNA molecule
b. One strand from the original DNA molecule and one created from new nucleotides
c. Two strands, both created from new nucleotides

JS
Jeremy Spiro-Winn
Numerade Educator
02:22

Problem 9

True or False: Because of the need for primers during DNA replication, the daughter cell's chromosomes will contain some RNA fragments.

Shiksha Dutta
Shiksha Dutta
Numerade Educator