The four nitrogenous bases commonly found if DNA are: 
a) Adenine, thymine, cytosine, uracil 
b) Uracil, adenine, cytosine, guanine.
c) Uracil, cytosine, guanine, thymine.
d) Adenine, thymine, cytosine, guanine.
e) None are correct.

In DNA, adenine forms ___________ hydrogen bonds with ____________ .

a. three / uracil

b. two / uracil

c. two / thymine

d. three / thymine

Compare and contrast the structure and components of DNA and RNA in prokaryotes.

Which of the following is most likely the number of base pairs in a bacterial chromosome?

a. 4,000,000

b. 4000

c. 400

d. 40

Which of the following descriptions best fits the class of molecules known as nucleotides?

a) A nitrogenous base & a phosphate group.

b) A nitrogenous base & a sugar.

c) A nitrogenous base, phosphate group & a sugar.

d) A nitrogenous base, a carbohydrate, & a sugar.

Which of the following statements about DNA structure is true?

a) The nucleic acid strands in a DNA molecule are oriented antiparallel to each other.

b) Nucleic acids are formed through phosphodiester bonds that link complementary nucleobases together.

c) Hydrogen bonds formed between the sugar-phosphate backbones of the two DNA chains stabilize the structure.

d) The pentose sugar in DNA is ribose (containing two hydroxyl groups).

Briefly describe the components of DNA, and explain its functional relationship to RNA and protein.

Identify and mark each of the following on the portion of DNA undergoing replication: replication fork, DNA polymerase, RNA primer, parent strands, leading strand, lagging strand, the direction of replication on each strand, and the 5′ end of each strand. <IMAGE>

Match the following examples of mutagens. <IMAGE>