Question 1

Which of the following best describes the difference between potential energy and kinetic energy in the context of human physiology?

Accepted Answer

Potential energy is stored in chemical bonds, while kinetic energy is the energy of motion, such as muscle contraction.

Question 2

Which equation correctly represents the relationship between energy, mass, and the speed of light, as it applies to matter in the universe?

Accepted Answer

$$E = mc^2$

Question 3

A sodium atom has 11 protons, 12 neutrons, and 11 electrons. Which of the following statements is correct regarding its atomic structure?

Accepted Answer

The atomic number is 11, and the mass number is 23.

Question 4

Which of the following best distinguishes a molecule from a compound?

Accepted Answer

A molecule consists of two or more atoms bonded together, while a compound consists of molecules made from different elements.

Question 5

Which of the following is an example of a suspension in the human body?

Accepted Answer

Blood, because cells are suspended in plasma.

Question 6

Which type of chemical bond is formed when electrons are transferred from one atom to another, resulting in oppositely charged ions?

Accepted Answer

Ionic bond

Question 7

Which of the following chemical reactions is represented by the equation $$AB \rightarrow A + B$$?

Accepted Answer

Decomposition reaction

Question 8

Which factor would most likely increase the rate of a chemical reaction in the human body?

Accepted Answer

Increasing the temperature

Question 9

Which of the following best explains why water is essential for body homeostasis?

Accepted Answer

Water acts as a solvent, regulates temperature, and facilitates chemical reactions.

Question 10

Which equation correctly represents the dissociation of a strong acid in water?

Accepted Answer

$$HA \rightarrow H^+ + A^-$$

Question 11

Carbohydrates are the body's preferred energy source. Which of the following best describes their general formula?

Accepted Answer

$$C_n(H_2O)_n$$

Question 12

Which of the following is a primary function of lipids in the human body?

Accepted Answer

Insulating organs and storing energy

Question 13

Which of the following best describes the role of enzymes in biochemical reactions?

Accepted Answer

Enzymes lower the activation energy, increasing the rate of reactions.

Question 14

Which of the following statements correctly compares DNA and RNA?

Accepted Answer

DNA contains deoxyribose and is double-stranded, while RNA contains ribose and is single-stranded.

Question 15

Which of the following best explains the role of ATP in cell metabolism?

Accepted Answer

ATP stores and transfers energy for cellular processes.

Question 16

A patient is experiencing acidosis. Which of the following would help buffer the blood pH?

Accepted Answer

Adding a weak base to neutralize excess $$H^+$$ ions

Question 17

Which of the following is a correct example of a synthesis reaction in the body?

Accepted Answer

$$A + B \rightarrow AB$$

Question 18

Which of the following best describes the biological function of carbohydrates?

Accepted Answer

They provide a readily available source of energy for cells.

Question 19

Which of the following is a real-life example of an exchange reaction in the human body?

Accepted Answer

The reaction between sodium bicarbonate and hydrochloric acid in the stomach: $$NaHCO_3 + $$HCl \rightarrow NaCl + H_2CO_3$$

Question 20

Which of the following statements about the structure of DNA is correct?

Accepted Answer

DNA is a double helix composed of nucleotide pairs held together by hydrogen bonds.

Fundamental Concepts in Chemistry and Biochemistry for Anatomy & Physiology

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