Question 1

Which property of carbon most directly explains its ability to form large, complex, and diverse molecules essential for life?

Accepted Answer

Its electron configuration, allowing four covalent bonds

Question 2

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen

Question 3

Why are hydrocarbons generally hydrophobic?

Accepted Answer

They are nonpolar and do not form hydrogen bonds with water

Question 4

Which of the following is NOT a way that carbon skeletons can vary?

Accepted Answer

Type of element bonded to carbon

Question 5

Which type of isomer is illustrated by two molecules with the same molecular formula but different covalent arrangements of their atoms?

Accepted Answer

Structural isomers

Question 6

A molecule with the formula $$C_4H_{10}$$ can be either butane or isobutane. These two molecules are:

Accepted Answer

Structural isomers

Question 7

Which functional group is most likely to act as an acid by donating a proton ($$H^+) to $$solution?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 8

Which chemical group is present in ATP and is key to its ability to store and release energy?

Accepted Answer

Phosphate group

Question 9

What is the immediate result when ATP reacts with water in a cell?

Accepted Answer

ATP is converted to ADP, inorganic phosphate, and energy is released

Question 10

Which of the following best explains why estradiol and testosterone, though both steroids, have different effects in the body?

Accepted Answer

They have different functional groups attached to the same carbon skeleton

Question 11

Which of the following statements about enantiomers is correct?

Accepted Answer

They are mirror images of each other and may have different biological activities

Question 12

Which of the following functional groups is basic and can accept a proton ($$H^+$$)?

Accepted Answer

Amino group ($$-NH_2$)

Question 13

A fat molecule contains long hydrocarbon chains. What property do these chains impart to fats?

Accepted Answer

They make fats nonpolar and hydrophobic

Question 14

Which of the following best describes the tetrahedral geometry of a carbon atom bonded to four other atoms?

Accepted Answer

The bond angles are approximately 109.5 degrees

Question 15

Which of the following is a real-life application of the importance of isomers in biology?

Accepted Answer

The effectiveness of a drug depending on its enantiomeric form

Question 16

Which of the following is a correct representation of the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H_2O} ightarrow \mathrm{ADP} + \mathrm{P_i} + 	ext{energy}$$

Question 17

Which functional group is found in both aldehydes and ketones?

Accepted Answer

Carbonyl group

Question 18

Which of the following best explains why carbon can form double and triple bonds?

Accepted Answer

Carbon has four valence electrons, allowing it to share two or three pairs of electrons with another atom

Question 19

Which of the following is NOT a characteristic of organic molecules?

Accepted Answer

They are always hydrophilic

Question 20

Which of the following best describes the role of ATP in cellular processes?

Accepted Answer

ATP serves as the primary energy transfer molecule in cells

Carbon and the Molecular Diversity of Life

Study Guide - Practice Questions