$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Question 1

Which of the following best describes the difference between a mixture and a compound?

Accepted Answer

A mixture can be separated by physical means, while a compound requires chemical reactions to separate.

Question 2

Which equation correctly represents the dissociation of hydrochloric acid ($$\mathrm{HCl}) in $$water?

Accepted Answer

$$\mathrm{HCl} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{H}_3\mathrm{O}^+ + \mathrm{Cl}^-$$

Question 3

Which statement about radioisotopes is correct?

Accepted Answer

Radioisotopes emit radiation as they decay to more stable forms.

Question 4

A patient is given a solution with a pH of 3. Which of the following best describes this solution?

Accepted Answer

It is acidic and has a high concentration of $$\mathrm{H}^+$$ ions.

Question 5

Which of the following best explains the role of enzymes in chemical reactions?

Accepted Answer

Enzymes lower the activation energy, speeding up the reaction.

Question 6

Which formula represents the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 7

Which of the following is a correct statement about amino acids?

Accepted Answer

Amino acids contain a carboxyl group and an amino group.

Question 8

Which of the following best describes the difference between organic and inorganic compounds?

Accepted Answer

Organic compounds contain carbon-hydrogen bonds, while inorganic compounds generally do not.

Question 9

A buffer system in the blood helps maintain pH by:

Accepted Answer

Converting strong acids and bases into weak ones.

Question 10

Which of the following is a correct description of a nucleotide?

Accepted Answer

A nucleotide consists of a sugar, a phosphate group, and a nitrogenous base.

Question 11

Which of the following is a correct statement about protein denaturation?

Accepted Answer

Denaturation disrupts the secondary, tertiary, or quaternary structure, affecting function.

Question 12

Which of the following best describes the difference between an atom and an element?

Accepted Answer

An atom is the smallest unit of an element that retains its properties.

Question 13

Which of the following is a correct statement about lipids?

Accepted Answer

Lipids are generally insoluble in water due to their nonpolar nature.

Question 14

Which of the following is a correct description of a peptide bond?

Accepted Answer

A peptide bond is a covalent bond formed between the carboxyl group of one amino acid and the amino group of another.

Question 15

Which of the following is true about the states of matter in the human body?

Accepted Answer

The human body contains solids, liquids, and gases.

Question 16

Which of the following is a correct statement about ATP?

Accepted Answer

ATP is a nucleotide that stores and transfers energy in cells.

Question 17

Which of the following best describes the difference between a chemical reaction and a physical change?

Accepted Answer

A chemical reaction involves the formation or breaking of chemical bonds, while a physical change does not.

Question 18

Which of the following is a correct statement about carbohydrates?

Accepted Answer

Carbohydrates are composed of monosaccharides linked by glycosidic bonds.

Question 19

Which of the following is a correct statement about globular proteins?

Accepted Answer

Globular proteins are generally soluble in water and have functional roles such as enzymes.

Question 20

Which of the following is a correct statement about acids and bases?

Accepted Answer

Acids release $$\mathrm{H}^+$$ ions in solution, while bases accept $$\mathrm{H}^+$$ ions or release $$\mathrm{OH}^-$$ ions.

Chapter 2: Chemistry Comes Alive – Key Concepts for Anatomy & Physiology

Study Guide - Practice Questions