Question 1

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

Accepted Answer

Its four valence electrons, allowing it to form four covalent bonds

Question 2

Stanley Miller's classic experiment was significant because it demonstrated which of the following?

Accepted Answer

The abiotic synthesis of organic compounds from simple inorganic molecules

Question 3

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

Accepted Answer

Tetrahedral

Question 4

When two carbon atoms are joined by a double bond, what is the spatial arrangement of the atoms bonded to these carbons?

Accepted Answer

They are in the same plane as the carbons

Question 5

Which of the following is an example of a molecule with only carbon and hydrogen atoms?

Accepted Answer

Methane ($$\mathrm{CH_4$})$$

Question 6

Which type of isomerism is illustrated by molecules that have the same molecular formula but differ in the covalent arrangement of their atoms?

Accepted Answer

Structural isomers

Question 7

A pharmaceutical company discovers that only one enantiomer of a drug is effective in treating a disease. What is the most likely explanation for this observation?

Accepted Answer

Biological systems are sensitive to molecular shape, and only one enantiomer fits the target site

Question 8

Which functional group is most likely to make a molecule behave as a base in aqueous solution?

Accepted Answer

Amino group ($$\mathrm{-NH_2$})$$

Question 9

Which of the following best explains why ATP is considered the primary energy-transferring molecule in the cell?

Accepted Answer

ATP contains a high-energy bond between its phosphate groups that can be hydrolyzed to release energy

Question 10

Which of the following statements about cis-trans isomers is correct?

Accepted Answer

They have the same covalent bonds but differ in spatial arrangement due to inflexible double bonds

Question 11

A molecule with the formula $$\mathrm{C_6H_{12}O_6$}$$ can exist as both glucose and fructose. What type of isomerism does this illustrate?

Accepted Answer

Structural isomerism

Question 12

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

Accepted Answer

They have the same carbon skeleton but different functional groups

Question 13

Which of the following statements about hydrocarbons is true?

Accepted Answer

They consist only of carbon and hydrogen atoms

Question 14

Which of the following best explains why carbon can form such a diversity of organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds with a variety of atoms

Question 15

Which of the following is a correct representation of a carboxyl group?

Accepted Answer

$$\mathrm{-COOH}$$

Question 16

A fat molecule is composed primarily of which elements?

Accepted Answer

Carbon, hydrogen, and oxygen

Question 17

Which of the following best describes the process that occurs when ATP reacts with water?

Accepted Answer

ATP is converted to ADP and an inorganic phosphate, releasing energy

Question 18

Which of the following is NOT a property of enantiomers?

Accepted Answer

They always have the same biological activity in organisms

Question 19

Which of the following functional groups is characteristic of alcohols?

Accepted Answer

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

Question 20

A molecule with a central carbon atom bonded to four different groups is most likely to exhibit which type of isomerism?

Accepted Answer

Enantiomerism

Carbon: The Backbone of Life (Chapter 4) – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards