$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$$

Question 1

Which of the following best describes a reversible chemical reaction?

Accepted Answer

A reaction where products can convert back to reactants under certain conditions.

Question 2

Cellular respiration is an example of which type of chemical reaction?

Accepted Answer

Irreversible reaction

Question 3

Which equation correctly represents the overall process of cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 4

Potential energy in molecules is primarily related to which of the following?

Accepted Answer

The position of electrons in covalent bonds

Question 5

Which type of covalent bond has the highest potential energy?

Accepted Answer

C-H bond

Question 6

Spontaneous processes in biology tend to result in which of the following?

Accepted Answer

Lower potential energy and increased disorder (higher entropy)

Question 7

Which statement about energy is correct?

Accepted Answer

Potential energy is stored energy, while kinetic energy is the energy of movement.

Question 8

Which of the following is a correct example of a functional group found in organic molecules?

Accepted Answer

HO—P—O——O—P—O

Question 9

What is the role of carbon in organic molecules?

Accepted Answer

It provides the molecule with its overall shape.

Question 10

Which process requires energy and results in decreased disorder of molecules?

Accepted Answer

Polymerization

Question 11

Monomers join together to form polymers through which type of reaction?

Accepted Answer

Dehydration synthesis

Question 12

Which of the following best explains why polar covalent bonds are easily broken?

Accepted Answer

They have unequal sharing of electrons, resulting in shorter, stronger bonds that release energy when broken.

Question 13

Which of the following is NOT a major family of small organic compounds (monomers) in biological systems?

Accepted Answer

Nucleic acids

Question 14

Which statement about spontaneous chemical reactions is correct?

Accepted Answer

They result in products with lower potential energy and higher entropy.

Question 15

Which of the following is a correct representation of the ATP production in cellular respiration?

Accepted Answer

$$6O_2 + 30ADP + 30Pi \rightarrow 6CO_2 + 6H_2O + 30ATP$$

Question 16

Which of the following best describes the relationship between entropy and spontaneous processes?

Accepted Answer

Spontaneous processes increase entropy.

Question 17

Which of the following is a correct example of an irreversible chemical reaction?

Accepted Answer

$$HCl + NaOH \rightarrow NaCl + H_2O$$

Question 18

Which of the following statements about organic molecules is correct?

Accepted Answer

Organic molecules always contain carbon and hydrogen.

Question 19

Which of the following is a correct example of a monomer and its corresponding macromolecule?

Accepted Answer

Monosaccharide and polysaccharide

Question 20

Which of the following best explains why polymerization does not occur spontaneously?

Accepted Answer

Polymerization requires energy input because it decreases entropy.

Water and Carbon: The Basis of Life (General Biology Study Notes)

Study Guide - Practice Questions