Question 1

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

Accepted Answer

Its ability to form four covalent bonds with other atoms

Question 2

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen

Question 3

A molecule with the formula $$C_5H_{12}$$ can have different structures. What are these molecules called?

Accepted Answer

Isomers

Question 4

Which functional group is responsible for the sour taste of vinegar and acts as an acid in cells?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 5

Which of the following statements about enantiomers is TRUE?

Accepted Answer

They are mirror images of each other and can have different effects in biological systems

Question 6

Which functional group is found in all amino acids and acts as a base?

Accepted Answer

Amino group ($$-NH_2$)

Question 7

What is the main reason that fats are able to store so much energy?

Accepted Answer

They contain many hydrocarbon chains, which release energy when oxidized

Question 8

Which of the following is a correct statement about the methyl group ($$-CH_3$)?

Accepted Answer

It is non-polar and affects gene expression

Question 9

A molecule contains both a carbonyl group ($$\u003eC=O) $$and a hydroxyl group ($$-OH). $$Which type of molecule is this most likely to be?

Accepted Answer

A carbohydrate

Question 10

Which functional group can form a 'cross-link' that stabilizes protein structure?

Accepted Answer

Sulfhydryl group ($$-SH)$$

Question 11

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

Accepted Answer

They have different functional groups attached to similar carbon skeletons

Question 12

Which of the following functional groups is most likely to be found in a molecule that can react with water to release energy, such as ATP?

Accepted Answer

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

Question 13

Which of the following is a property of the hydroxyl group ($$-OH$$)?

Accepted Answer

It is polar and can form hydrogen bonds with water

Question 14

A researcher discovers a molecule with the formula $$C_6H_{12}O_6$. She finds that it can exist as two different compounds with different physical properties. What is the best explanation for this observation?

Accepted Answer

The compounds are isomers

Question 15

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

Accepted Answer

They are the components most involved in chemical reactions

Question 16

Which of the following molecules contains a carbonyl group and is classified as a ketone?

Accepted Answer

Acetone

Question 17

Which of the following is a real-world example of the importance of enantiomers in medicine?

Accepted Answer

Ibuprofen, where only one enantiomer is effective in reducing inflammation

Question 18

Which of the following statements about the phosphate group ($$-$$OPO_3$$^{2-}) is $$correct?

Accepted Answer

It contributes a negative charge and is involved in energy transfer

Question 19

Which of the following best explains why carbon is considered the backbone of life?

Accepted Answer

It can form four covalent bonds, allowing for a variety of stable, complex molecules

Question 20

Which of the following functional groups is NOT polar?

Accepted Answer

Methyl group ($$-CH_3$)

Carbon and the Molecular Diversity of Life: Chapter 4 Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards