APCE Organic Chemistry & Biochemistry

Question 1

What is the general formula for an alkane?

Accepted Answer

CₙH₂ₙ₊₄.

Answer

CₙH₂ₙ.

Answer

CₙH₂ₙ₋₂.

Answer

CₙH₂ₙ₋₄.

Question 2

What is the functional group of alcohols?

Accepted Answer

Answer

-OH.

Answer

-COOH.

Answer

-NH₂.

Answer

-CH₃.

Question 3

What type of reaction is involved in the conversion of an alkene to an alkane?

Accepted Answer

Hydrogenation.

Answer

Hydrolysis.

Answer

Polymerization.

Answer

Substitution.

Question 4

What is a peptide bond?

Accepted Answer

A bond between the carboxyl group of one amino acid and the amino group of another amino acid.

Answer

A bond between two glucose molecules.

Answer

A bond between the nitrogen and hydrogen in amino acids.

Answer

A bond between two fatty acids.

Question 5

What is the primary function of enzymes in biochemical reactions?

Accepted Answer

To catalyze reactions and increase the reaction rate.

Answer

To slow down reactions.

Answer

To provide energy for the reaction.

Answer

To convert products into reactants.

Question 6

What is the general structure of a fatty acid?

Accepted Answer

A long hydrocarbon chain with a carboxyl group at one end.

Answer

A ring of carbon atoms.

Answer

A glycerol molecule with two hydroxyl groups.

Answer

A nitrogen-containing group attached to a hydrocarbon.

Question 7

Which of the following is an example of a monosaccharide?

Accepted Answer

Glucose.

Answer

Sucrose.

Answer

Starch.

Answer

Lactose.

Question 8

What type of bond holds the two strands of DNA together?

Accepted Answer

Hydrogen bonds.

Answer

Ionic bonds.

Answer

Covalent bonds.

Answer

Disulfide bonds.

Question 9

What is the main difference between saturated and unsaturated fats?

Accepted Answer

Saturated fats have no double bonds, while unsaturated fats have one or more double bonds.

Answer

Saturated fats have fewer carbon atoms.

Answer

Saturated fats are liquid at room temperature.

Answer

Unsaturated fats are solid at room temperature.