MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: C. A lipid with a hydrophilic head and hydrophobic tails
Explanation:
Phospholipids spontaneously form bilayers in water.
They are the main structural molecules of cell membranes.
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Correct Answer: D. Amino acids
Explanation:
Proteins are polymers of amino acids linked by peptide bonds.
Their sequence determines folding and function.
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Correct Answer: A. Amino acids
Explanation:
Proteins are polymers of amino acids linked by peptide bonds.
Their sequence determines folding and function.
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Correct Answer: B. Amino acids
Explanation:
Proteins are polymers of amino acids linked by peptide bonds.
Their sequence determines folding and function.
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Correct Answer: C. The covalent bond joining amino acids
Explanation:
Peptide bonds form through dehydration synthesis.
They link the carboxyl group of one amino acid to the amino group of another.
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Correct Answer: D. The covalent bond joining amino acids
Explanation:
Peptide bonds form through dehydration synthesis.
They link the carboxyl group of one amino acid to the amino group of another.
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Correct Answer: A. The covalent bond joining amino acids
Explanation:
Peptide bonds form through dehydration synthesis.
They link the carboxyl group of one amino acid to the amino group of another.
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Correct Answer: B. Loss of normal protein shape and function
Explanation:
Heat, pH, or chemicals can disrupt protein folding.
The amino-acid sequence may remain intact.
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Correct Answer: C. Loss of normal protein shape and function
Explanation:
Heat, pH, or chemicals can disrupt protein folding.
The amino-acid sequence may remain intact.
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Correct Answer: C. 176
Explanation:
The sequence doubles at each step.
Thus, 88 × 2 = 176.
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Correct Answer: D. 63
Explanation:
Each term is twice the previous term plus 1.
So 31 × 2 + 1 = 63.
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Correct Answer: B. 17
Explanation:
The differences are 1, 2, 3, and 4.
The next difference is 5, producing 17.
