MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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A.
Plant and animal cells
B.
Fungal and animal cells
C.
Only plant cells
D.
Bacterial and archaeal cells
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Correct Answer: D. Bacterial and archaeal cells
Explanation:
Prokaryotes lack a membrane-bound nucleus.
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A.
Vitamins, minerals, water, and salts
B.
Atoms, ions, tissues, and organs
C.
Sugars, acids, bases, and gases
D.
Carbohydrates, lipids, proteins, and nucleic acids
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Correct Answer: D. Carbohydrates, lipids, proteins, and nucleic acids
Explanation:
The four major macromolecule groups perform structural, energetic, catalytic, and informational roles.
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A.
Membrane-bound nucleus
B.
Presence of DNA
C.
Presence of ribosomes
D.
Presence of a plasma membrane
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Correct Answer: A. Membrane-bound nucleus
Explanation:
Both cell types have DNA, ribosomes, and membranes.
Choose an option to check your answer.
A.
Carbohydrates, lipids, proteins, and nucleic acids
B.
Vitamins, minerals, water, and salts
C.
Atoms, ions, tissues, and organs
D.
Sugars, acids, bases, and gases
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Correct Answer: A. Carbohydrates, lipids, proteins, and nucleic acids
Explanation:
The four major macromolecule groups perform structural, energetic, catalytic, and informational roles.
Choose an option to check your answer.
A.
Presence of DNA
B.
Membrane-bound nucleus
C.
Presence of ribosomes
D.
Presence of a plasma membrane
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Correct Answer: B. Membrane-bound nucleus
Explanation:
Both cell types have DNA, ribosomes, and membranes.
Choose an option to check your answer.
A.
Vitamins, minerals, water, and salts
B.
Carbohydrates, lipids, proteins, and nucleic acids
C.
Atoms, ions, tissues, and organs
D.
Sugars, acids, bases, and gases
Show Answer
Correct Answer: B. Carbohydrates, lipids, proteins, and nucleic acids
Explanation:
The four major macromolecule groups perform structural, energetic, catalytic, and informational roles.
Choose an option to check your answer.
A.
Presence of DNA
B.
Presence of ribosomes
C.
Membrane-bound nucleus
D.
Presence of a plasma membrane
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Correct Answer: C. Membrane-bound nucleus
Explanation:
Both cell types have DNA, ribosomes, and membranes.
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A.
A fully formed organ
B.
A type of lipid only
C.
A small building block that can join to form a polymer
D.
A mineral ion
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Correct Answer: C. A small building block that can join to form a polymer
Explanation:
Monomers link through covalent bonds.
Choose an option to check your answer.
A.
A membrane-bound nucleus
B.
A protein-making organelle
C.
A bacterial vacuole
D.
Region containing the chromosome in a prokaryotic cell
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Correct Answer: D. Region containing the chromosome in a prokaryotic cell
Explanation:
The nucleoid is not enclosed by a nuclear membrane.
Choose an option to check your answer.
A.
A fully formed organ
B.
A type of lipid only
C.
A mineral ion
D.
A small building block that can join to form a polymer
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Correct Answer: D. A small building block that can join to form a polymer
Explanation:
Monomers link through covalent bonds.
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A.
It loses water and shrinks
B.
It gains water and bursts
C.
It becomes turgid
D.
It divides rapidly
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Correct Answer: A. It loses water and shrinks
Explanation:
Water moves out toward the higher solute concentration.
Choose an option to check your answer.
A.
It gains water and bursts
B.
It loses water and shrinks
C.
It becomes turgid
D.
It divides rapidly
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Correct Answer: B. It loses water and shrinks
Explanation:
Water moves out toward the higher solute concentration.
