Question 1

Which of the following statements best explains the importance of functional groups in organic molecules?

Accepted Answer

Functional groups are responsible for the specific chemical properties and reactivity of organic molecules.

Question 2

A molecule with the functional group $$-OH is $$classified as which type of compound?

Accepted Answer

Alcohol

Question 3

Which functional group is present in all amino acids and is responsible for their basic properties?

Accepted Answer

Amino group $$(-NH_2$)$$

Question 4

Which of the following functional groups is found in organic phosphates and plays a key role in energy transfer in cells?

Accepted Answer

Phosphate group $$(-$$OPO_3$$^{2-})$$

Question 5

A compound with the functional group $$-SH is $$most likely classified as which of the following?

Accepted Answer

Thiol

Question 6

Which functional group is most likely to make a molecule more acidic?

Accepted Answer

Carboxyl group $$(-COOH)$$

Question 7

Which of the following best describes a methylated compound?

Accepted Answer

A compound containing a methyl group $$(-CH_3$)$$ attached to its structure.

Question 8

Which functional group is commonly found in both ketones and aldehydes?

Accepted Answer

Carbonyl group $$(-C=O)$$

Question 9

A molecule with both an amino group $$(-NH_2$)$$ and a carboxyl group $$(-COOH) is $$most likely to be:

Accepted Answer

An amino acid

Question 10

Which of the following functional groups is most likely to form disulfide bridges in proteins, contributing to protein structure?

Accepted Answer

Sulfhydryl group $$(-SH)$$

Question 11

Which functional group is most likely to increase the solubility of an organic molecule in water?

Accepted Answer

Hydroxyl group $$(-OH)$$

Question 12

Which of the following is a correct pairing of a functional group and its compound name?

Accepted Answer

Amino group $$(-NH_2$)$$: Amine

Question 13

Which functional group is most likely to be found in DNA and RNA, playing a role in the backbone structure of these molecules?

Accepted Answer

Phosphate group $$(-$$OPO_3$$^{2-})$$

Question 14

A compound with the structure $$R-COOH is $$best described as:

Accepted Answer

A carboxylic acid

Question 15

Which of the following functional groups is least likely to participate in hydrogen bonding with water?

Accepted Answer

Methyl group $$(-CH_3$)$$

Functional Groups in Organic Molecules

Study Guide - Practice Questions