CHEM 120 Final Exam Practice Questions

CHEM 120 Final Exam Practice
Questions

, CHEM 120 Final Exam Practice Questions

1. Question: (TCO 12) The DNA double helix is . (Pts. : 5)

made up of two polynucleotide

strands composed of adenine and

thymine

a puzzle to geneticists

composed of adenine and

guanine composed of two

chromosomes


2.Question: (TCO 12) Which of the following best describes the action of enzymes in living
systems? A specific enzyme generally catalyzes (Pts. : 5)

one specific reaction.

a group of similar

reactions. many

different reactions.

either one specific reaction or a group of similar

reactions. random reactions.


3. Question: (TCO 12) Which of the following is not an unsaturated fatty acid? (Pts. : 5)
CH3CH2CH2CH=CHCOOH

CH3CH=CHCH=CHCOOH

CH3CH2CH2CH2CH2COOH

CH3CH2CH2CH2CH2CH=CHCOOH

CH3CH=CHCH2CH=CHCOOH



4. Question: (TCO 12) The primary structure of a protein is determined by (Pts. : 5)
the amino-acid composition.

the order of amino acids in the protein.

the hydrogen bonding that gives the protein a three-dimensional

shape. the intertwining of protein molecules to form a

“functional” protein.

the hydrogen bonds between sulfur atoms on different amino acids.



5. Question: (TCO 12) Which of the following is a disaccharide? (Pts. : 5)