Question 1

Which property of carbon allows it to form large, complex, and diverse molecules essential for life?

Accepted Answer

Its ability to form four covalent bonds with other atoms

Question 2

Organic chemistry is defined as the study of compounds containing which element?

Accepted Answer

Carbon

Question 3

A molecule with the formula $$C_5H_{12}$$ can exist as both pentane and 2-methylbutane. What term describes this relationship?

Accepted Answer

Structural 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

What is the valence of carbon, and how does this relate to its bonding behavior?

Accepted Answer

Carbon has a valence of 4, allowing it to form four covalent bonds

Question 6

Which of the following best explains why hydrocarbons are a major component of fats and can release large amounts of energy?

Accepted Answer

Hydrocarbons contain only carbon and hydrogen, forming nonpolar covalent bonds that store energy

Question 7

Which functional group is found in alcohols and is polar due to its electronegative oxygen atom?

Accepted Answer

Hydroxyl group ($$-OH)$$

Question 8

Ibuprofen and albuterol are examples of drugs that exist as enantiomers. What is the significance of enantiomers in biological systems?

Accepted Answer

Enantiomers are mirror images and can have different biological activities

Question 9

Which functional group can act as a base and is commonly found in amino acids?

Accepted Answer

Amino group ($$-NH_2$)

Question 10

A molecule contains both a carboxyl group and an amino group. What type of molecule is this most likely to be?

Accepted Answer

An amino acid

Question 11

Which functional group is responsible for stabilizing protein structure by forming cross-links?

Accepted Answer

Sulfhydryl group ($$-SH)$$

Question 12

Which of the following is a non-polar functional group that affects gene expression and the function of sex hormones?

Accepted Answer

Methyl group ($$-CH_3$)

Question 13

Which functional group contributes a negative charge to molecules and is involved in energy transfer reactions in cells?

Accepted Answer

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

Question 14

Which type of isomerism is illustrated by cis-2-butene and trans-2-butene?

Accepted Answer

Cis-trans isomerism

Question 15

Which of the following statements about carbon skeletons is correct?

Accepted Answer

Carbon skeletons can vary in length, branching, double bond position, and presence of rings

Question 16

Which of the following molecules is a hydrocarbon?

Accepted Answer

C$$_2H$_6 ($$ethane)

Question 17

Which functional group is found in sugars and can exist as either a ketone or an aldehyde?

Accepted Answer

Carbonyl group ($$\u003eC=O)$$

Question 18

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

Accepted Answer

Functional groups determine the chemical reactivity and unique properties of organic molecules

Question 19

Which molecule would be most likely to form hydrogen bonds with water due to its functional group?

Accepted Answer

Ethanol ($$C_2H_5OH)$$

Question 20

A mutation causes a change in the functional group attached to a hormone molecule, replacing a hydroxyl group with a methyl group. What is the most likely effect?

Accepted Answer

The hormone will become less polar and may alter its biological activity

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

Study Guide - Practice Questions

Study Guide - Flashcards