MCQ Collection
MDCAT Biology MCQs
Practice MDCAT Biology questions with answers and explanations.
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Correct Answer: B. 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: 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: D. 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: A. A biological catalyst
Explanation:
Enzymes lower activation energy.
They speed reactions without being consumed overall.
