Question 1

Which of the following best explains why carbon is able to form a diversity of compounds essential for life on Earth?

Accepted Answer

Carbon atoms can form up to four covalent bonds, enabling complex molecular structures.

Question 2

What is the valence of a carbon atom, and how many electrons are found in its outermost shell?

Accepted Answer

Valence is 4; there are 4 electrons in the outermost shell.

Question 3

How many covalent bonds can a carbon atom typically form?

Accepted Answer

4

Question 4

Which of the following elements commonly form covalent bonds with carbon to create living matter?

Accepted Answer

Nitrogen, Oxygen, Hydrogen, and Sulfur

Question 5

All hydrocarbons contain which two elements?

Accepted Answer

Carbon and Hydrogen

Question 6

Which statement best describes how carbon skeletons can vary in organic molecules?

Accepted Answer

They can vary in length, branching, and the presence of rings.

Question 7

Which of the following is NOT a type of hydrocarbon?

Accepted Answer

Alcohol

Question 8

Which functional group is characterized by the formula $$\mathrm{R{-}OH}$$ and is commonly found in alcohols?

Accepted Answer

Hydroxyl group

Question 9

Which of the following is a property of organic molecules that depends on the carbon skeleton arrangement?

Accepted Answer

The shape and function of the molecule

Question 10

Which of the following chemical groups is hydrophilic and increases the solubility of organic compounds in water?

Accepted Answer

Hydroxyl group ($$\mathrm{OH})$$

Question 11

A molecule with the formula $$\mathrm{C_6H_{12}O_6$} is $$most likely which type of organic compound?

Accepted Answer

A carbohydrate

Question 12

Which of the following best describes adenosine triphosphate (ATP)?

Accepted Answer

A molecule that stores and transfers energy within cells

Question 13

Which chemical group is found in all amino acids and is responsible for their acidic properties?

Accepted Answer

Carboxyl group ($$\mathrm{COOH})$$

Question 14

Which of the following is NOT a property of hydrocarbons?

Accepted Answer

They are highly soluble in water.

Question 15

Which of the following best explains why ATP is important in biological systems?

Accepted Answer

ATP provides energy for cellular processes by releasing a phosphate group.

Question 16

Which of the following is a correct representation of a carbon-carbon double bond?

Accepted Answer

$$\mathrm{C=C}$$

Question 17

Which of the following molecules contains a carbonyl group?

Accepted Answer

Acetone ($$\mathrm{CH_3COCH_3})$$

Question 18

Which of the following is a correct statement about the solubility of organic molecules in water?

Accepted Answer

Molecules with polar or charged groups are generally more soluble in water.

Question 19

Which of the following is a correct example of a seven-carbon organic compound?

Accepted Answer

Heptane ($$\mathrm{C_7H_{16}})$$

Question 20

Which of the following best describes the difference between a hydrophilic and a hydrophobic group?

Accepted Answer

Hydrophilic groups form hydrogen bonds with water, while hydrophobic groups do not.

General biology unit 4

Study Guide - Practice Questions