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Genetic Mutation Question Bank: Case-Based MCQs with Explanations

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1. Which DNA repair mechanism primarily corrects replication errors such as base mispairing? A. Base excision repair B. Homologous recombination C. Mismatch repair D. Nucleotide excision repair E. Direct repair Correct Answer: C) Mismatch repair Detailed Explanation: Mismatch repair (MMR) is the primary DNA repair mechanism that corrects errors introduced during DNA replication, particularly base-base

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“Master Transcription with Case-Based MCQs: Test Your Understanding!”

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1.  A previously healthy 8-year-old develops symptoms of fatigue and anemia. Bone marrow biopsy reveals decreased erythropoiesis, and further molecular analysis shows that the transcription of β-globin mRNA is markedly reduced due to a defect in the assembly of the pre-initiation complex. However, RNA polymerase II is intact and enzymatically functional. Which of the following

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