Question 1

Which property of carbon most directly contributes to the diversity of organic molecules found in living organisms?

Accepted Answer

Its ability to form four covalent bonds with a variety of atoms

Question 2

Which of the following best describes a structural isomer?

Accepted Answer

Molecules with the same molecular formula but different covalent arrangements of their atoms

Question 3

A molecule with the formula $$C_6H_{12}O_6$ can exist as glucose or fructose. What type of isomers are these?

Accepted Answer

Structural isomers

Question 4

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

Accepted Answer

Carboxyl group

Question 5

ATP is considered an important molecule in cellular processes because:

Accepted Answer

It stores energy in the bonds between its phosphate groups

Question 6

Which of the following statements about hydrocarbons is correct?

Accepted Answer

They are composed only of carbon and hydrogen

Question 7

Which of the following best explains why carbon can form large, complex molecules?

Accepted Answer

Carbon has four valence electrons, allowing it to form four covalent bonds

Question 8

Which of the following is NOT a functional group commonly found in organic molecules?

Accepted Answer

Chloride group

Question 9

A molecule with a carbonyl group at the end of its carbon skeleton is classified as:

Accepted Answer

An aldehyde

Question 10

Which of the following best describes the difference between cis-trans isomers?

Accepted Answer

They have the same covalent bonds but differ in spatial arrangement around a double bond

Question 11

Which of the following best explains why ATP can release energy when it reacts with water?

Accepted Answer

The hydrolysis of ATP breaks a high-energy phosphate bond, releasing energy

Question 12

Which of the following is a real-life example of the importance of enantiomers in biology?

Accepted Answer

One enantiomer of a drug may be therapeutic, while the other may be harmful

Question 13

Which of the following statements about the versatility of carbon is correct?

Accepted Answer

Carbon can form single, double, and triple covalent bonds with other atoms

Question 14

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

Accepted Answer

Amino group

Question 15

Which of the following best describes the role of functional groups in organic molecules?

Accepted Answer

They determine the unique chemical properties and reactivity of molecules

Question 16

A hydrocarbon chain with a double bond between two carbon atoms will have what effect on the molecule's geometry?

Accepted Answer

It will cause the atoms joined to the double-bonded carbons to be in the same plane

Question 17

Which of the following best explains why fats are a good source of energy?

Accepted Answer

They contain many hydrocarbon chains that can undergo reactions releasing large amounts of energy

Question 18

Which of the following is a correct statement about the carbon skeletons of organic molecules?

Accepted Answer

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

Question 19

Which of the following best describes the relationship between estradiol and testosterone?

Accepted Answer

They have the same carbon skeleton but differ in the chemical groups attached to the rings

Question 20

A scientist discovers a new organic molecule with the formula $$C_5H_{10}O_5$. Which of the following is most likely true about this molecule?

Accepted Answer

It could have isomers with different properties

Carbon and the Molecular Diversity of Life – Study Notes

Study Guide - Practice Questions