DNA Structure and Replication

DNA Structure

100

What kind of macromolecule is DNA? A. Protein B. Carbohydrate C. Enzyme D. Nucleic acid E. Lipid

D. Nucleic acid

200

DNA is made up of monomers called _________________

nucleotides

300

DNA looks like a twisted ladder. Its shape is called ______________________.

double helix

400

Each nucleotide has three parts. Name them.

Base, sugar, phosphate

500

What is the name of the sugar in DNA?

deoxyribose

Base-Pairing

100

What base pairs up with adenine (A)?

Thymine/T

200

What base does guanine (G) pair up with?

Cytosine (C)

300

If a sample is DNA is 38% cytosine (C), what percent adenine (A) is it?

12%

400

If a DNA sample is 38% cytosine (C), what percent is guanine (G)?

38%

500

Which two bases are purines?

Adenine and guanine

DNA Replication

100

DNA replication produces daughter strands that are _____________________ the original strand. A. identical to B. similar to C. different from

A. identical to

200

What kind of DNA replication actually occurs? A. Conservative B. Semi-conservative C. Dispersive

Semi-conservative replication

300

Which of the following is the FIRST step in DNA replication? A. Helicase unzips the double helix B. DNA polymerase proofreads the strand C. DNA polymerase unzips the double helix D. Helicase proofreads the strand

A. Helicase unzips the double helix

400

What is a mistake in DNA called?

A mutation

500

What is the name of enzyme responsible for proofreading the final daughter strands?

DNA polymerase