MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
Choose an option to check your answer.
Correct Answer: B. Cell division producing haploid gametes or spores
Explanation:
Meiosis includes two nuclear divisions after one DNA replication.
It reduces chromosome number and creates variation.
Choose an option to check your answer.
Correct Answer: C. Cell division producing haploid gametes or spores
Explanation:
Meiosis includes two nuclear divisions after one DNA replication.
It reduces chromosome number and creates variation.
Choose an option to check your answer.
Correct Answer: D. Four genetically varied haploid cells
Explanation:
Meiosis halves chromosome number.
Crossing over and independent assortment create variation.
Choose an option to check your answer.
Correct Answer: A. An insertion or deletion that changes the reading frame
Explanation:
Frameshifts alter codon grouping downstream.
They often produce major changes in the protein.
Choose an option to check your answer.
Correct Answer: A. Four genetically varied haploid cells
Explanation:
Meiosis halves chromosome number.
Crossing over and independent assortment create variation.
Choose an option to check your answer.
Correct Answer: B. An insertion or deletion that changes the reading frame
Explanation:
Frameshifts alter codon grouping downstream.
They often produce major changes in the protein.
Choose an option to check your answer.
Correct Answer: B. Four genetically varied haploid cells
Explanation:
Meiosis halves chromosome number.
Crossing over and independent assortment create variation.
Choose an option to check your answer.
Correct Answer: C. An insertion or deletion that changes the reading frame
Explanation:
Frameshifts alter codon grouping downstream.
They often produce major changes in the protein.
Choose an option to check your answer.
Correct Answer: C. Homologous chromosomes pair and crossing over may occur
Explanation:
Synapsis forms homologous pairs called bivalents.
Crossing over exchanges DNA between nonsister chromatids.
Choose an option to check your answer.
Correct Answer: D. at
Explanation:
'At' is used for a precise clock time.
'In' and 'on' are used for broader periods or dates.
Choose an option to check your answer.
Correct Answer: A. on
Explanation:
'On' is used with days of the week and specific dates.
Therefore, 'on Friday' is correct.
Choose an option to check your answer.
Correct Answer: B. in
Explanation:
'In' is used with years, months, and longer periods.
The year 2022 requires 'in.'
