Anatomy & Physiology
Biochemistry
Biology & Genetics
Famous Doctors and Medical History
MCAT questions
100

What organ pumps blood throughout the human body?


What is the heart

100

What molecule is commonly called the "energy currency" of the cell?

Answer: What is ATP (adenosine triphosphate)?

100

What molecule contains the genetic instructions used by cells?


Answer: What is DNA?

100

Who is often called the "Father of Medicine" and is associated with the Hippocratic Oath?

Answer: Who is Hippocrates?

100

Which organelle is responsible for producing most ATP in a typical human cell?


Answer: What is the mitochondria?

200

What is the largest organ of the human body?


Answer: What is the skin?

200

What type of macromolecule are enzymes?



Answer: What are proteins?

200

During which stage of the cell cycle is DNA replicated?

Answer: What is the S phase?

200

Who developed the first successful smallpox vaccine?

Who developed the first successful smallpox vaccine?

Answer: Who is Edward Jenner?

200

Question: If a solution has a pH of 3, is it acidic, basic, or neutral?


Answer: What is acidic?

300

Which chamber of the heart pumps oxygenated blood into the systemic circulation?


Answer: What is the left ventricle?

300

What organelle is primarily responsible for producing ATP through aerobic cellular respiration?


Answer: What is the mitochondrion?

300

If a person has two different alleles for a gene, what term describes their genotype?


What is Heterozygous?

300

Which scientist's work with bacteria and vaccination helped establish the germ theory of disease?

Answer: Who is Louis Pasteur.

300

A red blood cell is placed into a solution with a much lower solute concentration than the cell. Water moves into the cell and causes it to swell. What type of solution is the cell in?


Answer: What is a hypotonic solution?

400

A patient has difficulty breathing because the alveoli in their lungs cannot efficiently exchange gases. Which two gases normally move across the alveolar-capillary membrane?



Answer: What are oxygen and carbon dioxide?

400

If the pH of a solution decreases from 7 to 5, has the hydrogen ion concentration increased or decreased?


Answer: What is increased?

+50 points more if they say: A decrease of 2 pH units means the H⁺ concentration increases by 100×.

400

In a typical Mendelian cross between two heterozygous individuals (Aa × Aa), what percentage of offspring are expected to be homozygous recessive?


Answer: What is 25%?

400

Which nurse became famous for improving sanitation and patient care during the Crimean War?


Answer: Who is Florence Nightingale?

400

A researcher observes that increasing the concentration of a drug causes a proportional increase in its effect until the effect reaches a maximum. What concept best explains why the effect eventually stops increasing?


Answer: What is receptor/enzyme saturation?

500

A patient's blood pressure suddenly drops. Which hormone would increase sodium and water reabsorption by the kidneys, helping increase blood volume and blood pressure?

What is aldosterone?

500

Question: An enzyme normally functions best at pH 7. If its environment changes to pH 2, its activity dramatically decreases because its three-dimensional structure is disrupted. What has most likely happened to the enzyme?


Answer: What is denaturation?

500

A mutation occurs in a DNA sequence but does not change the amino acid produced during translation. What type of mutation is this?


Answer: What is a silent mutation?

500

Question: Which physician performed the famous experiments that demonstrated that Helicobacter pylori can cause peptic ulcers?

Answer: Who is Barry Marshall?

Bonus 50 points: He famously drank a culture containing the bacteria himself to demonstrate the connection.

500

A researcher wants to determine whether a new drug actually causes a reduction in blood pressure. Which study design provides the strongest evidence that the drug itself caused the observed effect?


Answer: What is a randomized controlled trial?