1.1 The Structure of DNA

Question 1

What is a nucleotide made out of?

Answer 1

Deoxyribose sugar
Phosphate
Base

Question 2

What makes up the sugar-phosphate backbone?

Answer 2

Deoxyribose sugar and the phosphate

Question 3

What is the base pairing rule?

Answer 3

Adenine - Thymine
Guanine - Cytosine

Question 4

What are the bases in DNA held together by?

Answer 4

Hydrogen bonds

Question 5

How many strands of DNA are in a DNA molecule?

Answer 5

2

Question 6

What can be said about the structure of the strands?

Answer 6

They are antiparallel

Question 7

Which ends of the strands are the deoxyribose sugar and phosphate located?

Answer 7

Deoxyribose sugar - 3’
Phosphate - 5’

Question 8

How is DNA packaged in a prokaryote?

Answer 8

Single, circular chromosome and smaller circular plasmids

Question 9

How is DNA packaged in a eukaryote?

Answer 9

Liner chromosome in the nucleus, tightly coiled and packaged by histone proteins.

Question 10

Aside from the nucleus, where else can DNA be found in a eukaryote?

Answer 10

In the mitochondria and chloroplasts, with circular chromosomes.

Question 11

What is special about yeast cells?

Answer 11

It is a eukaryote that has plasmids.