Question 1

Which of the following best illustrates the relationship between structure and function in biological systems?

Accepted Answer

The biconcave shape of red blood cells increases their surface area for gas exchange.

Question 2

Which of the following is the correct order of levels of organization in the human body, from simplest to most complex?

Accepted Answer

Chemical, cell, tissue, organ, organ system, organism

Question 3

A patient is experiencing low blood glucose levels. Which feedback system is most likely to be activated, and what is its effect?

Accepted Answer

Negative feedback system; increases blood glucose by stimulating glucagon release.

Question 4

Which of the following best describes homeostasis?

Accepted Answer

The process by which the body maintains a constant internal environment despite external changes.

Question 5

Which of the following is a correct comparison between intracellular and extracellular fluid?

Accepted Answer

Intracellular fluid contains more potassium ions, while extracellular fluid contains more sodium ions.

Question 6

Which of the following is NOT a function of enzymes in biological reactions?

Accepted Answer

Enzymes are consumed during the reaction and cannot be reused.

Question 7

A solution has a pH of 3. Which of the following statements is correct regarding its hydrogen ion concentration?

Accepted Answer

It has a higher concentration of hydrogen ions than a solution with pH 7.

Question 8

Which of the following best explains why carbon is so versatile in forming organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds with other atoms.

Question 9

Which of the following is a correct statement about dehydration synthesis?

Accepted Answer

It joins monomers together to form polymers by removing water.

Question 10

Which of the following bonds is the strongest?

Accepted Answer

Triple covalent bond

Question 11

A radioactive isotope of carbon has 6 protons and 8 neutrons. What is its atomic mass?

Accepted Answer

$$14$$

Question 12

Which of the following is true regarding ATP hydrolysis?

Accepted Answer

ATP hydrolysis releases energy that can be used for cellular work.

Question 13

Which of the following is a correct statement about the law of conservation of energy?

Accepted Answer

Energy is neither created nor destroyed, only transformed from one form to another.

Question 14

Which of the following is a correct comparison between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Question 15

Which of the following best describes a buffer solution?

Accepted Answer

A solution that resists changes in pH when acids or bases are added.

Question 16

Which of the following is a correct statement about enzymes?

Accepted Answer

Enzymes are highly specific and usually catalyze only one type of reaction.

Question 17

Which of the following is a correct description of a positive feedback system?

Accepted Answer

It amplifies the initial stimulus, leading to a greater response.

Question 18

Which of the following is a correct statement about the structure of ATP?

Accepted Answer

ATP consists of adenine, ribose, and three phosphate groups.

Question 19

Which of the following is a correct statement about chemical reactions in the body?

Accepted Answer

Synthesis reactions combine smaller molecules to form larger ones.

Question 20

Which of the following is a correct statement about the difference between signs and symptoms?

Accepted Answer

Signs are objective and measurable, while symptoms are subjective and reported by the patient.

Anatomy & Physiology: Foundational Concepts and Chemistry for Life

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