MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
Choose an option to check your answer.
Correct Answer: C. A single sugar unit
Explanation:
Monosaccharides are the simplest carbohydrates.
Glucose, fructose, and galactose are examples.
Choose an option to check your answer.
Correct Answer: D. A single sugar unit
Explanation:
Monosaccharides are the simplest carbohydrates.
Glucose, fructose, and galactose are examples.
Choose an option to check your answer.
Correct Answer: A. A single sugar unit
Explanation:
Monosaccharides are the simplest carbohydrates.
Glucose, fructose, and galactose are examples.
Choose an option to check your answer.
Correct Answer: B. Glucose
Explanation:
Glucose is oxidized during cellular respiration.
Its energy is transferred to ATP.
Choose an option to check your answer.
Correct Answer: C. Glucose
Explanation:
Glucose is oxidized during cellular respiration.
Its energy is transferred to ATP.
Choose an option to check your answer.
Correct Answer: D. Glucose
Explanation:
Glucose is oxidized during cellular respiration.
Its energy is transferred to ATP.
Choose an option to check your answer.
Correct Answer: A. Region containing the chromosome in a prokaryotic cell
Explanation:
The nucleoid is not enclosed by a nuclear membrane.
It contains the main bacterial chromosome.
Choose an option to check your answer.
Correct Answer: A. A small building block that can join to form a polymer
Explanation:
Monomers link through covalent bonds.
Examples include amino acids, nucleotides, and monosaccharides.
Choose an option to check your answer.
Correct Answer: B. Region containing the chromosome in a prokaryotic cell
Explanation:
The nucleoid is not enclosed by a nuclear membrane.
It contains the main bacterial chromosome.
Choose an option to check your answer.
Correct Answer: B. Formation of a bond by removal of water
Explanation:
Dehydration reactions join monomers into larger molecules.
A water molecule is released during bond formation.
Choose an option to check your answer.
Correct Answer: C. Small independently replicating DNA molecules in many bacteria
Explanation:
Plasmids often carry accessory genes such as antibiotic resistance.
They can sometimes move between cells.
Choose an option to check your answer.
Correct Answer: C. Formation of a bond by removal of water
Explanation:
Dehydration reactions join monomers into larger molecules.
A water molecule is released during bond formation.
