MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: C. A cell with two sets of chromosomes
Explanation:
Diploid cells contain homologous chromosome pairs.
Most human body cells are diploid.
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Correct Answer: D. A DNA change that does not alter the encoded amino acid
Explanation:
The genetic code is redundant.
Different codons can specify the same amino acid.
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Correct Answer: D. Homologous chromosomes pair and crossing over may occur
Explanation:
Synapsis forms homologous pairs called bivalents.
Crossing over exchanges DNA between nonsister chromatids.
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Correct Answer: A. A DNA change that does not alter the encoded amino acid
Explanation:
The genetic code is redundant.
Different codons can specify the same amino acid.
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Correct Answer: B. A DNA change that does not alter the encoded amino acid
Explanation:
The genetic code is redundant.
Different codons can specify the same amino acid.
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Correct Answer: C. Nuclear envelopes reform around separated chromosomes
Explanation:
Chromosomes reach the poles and decondense.
Two daughter nuclei are formed.
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Correct Answer: D. Nuclear envelopes reform around separated chromosomes
Explanation:
Chromosomes reach the poles and decondense.
Two daughter nuclei are formed.
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Correct Answer: A. Nuclear envelopes reform around separated chromosomes
Explanation:
Chromosomes reach the poles and decondense.
Two daughter nuclei are formed.
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Correct Answer: B. Division of the cytoplasm
Explanation:
Cytokinesis separates the parent cell into daughter cells.
Animal cells use a cleavage furrow, while plant cells form a cell plate.
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Correct Answer: C. Division of the cytoplasm
Explanation:
Cytokinesis separates the parent cell into daughter cells.
Animal cells use a cleavage furrow, while plant cells form a cell plate.
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Correct Answer: D. Division of the cytoplasm
Explanation:
Cytokinesis separates the parent cell into daughter cells.
Animal cells use a cleavage furrow, while plant cells form a cell plate.
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Correct Answer: A. Cell division producing haploid gametes or spores
Explanation:
Meiosis includes two nuclear divisions after one DNA replication.
It reduces chromosome number and creates variation.
