Multiple-choice questions

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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Genetic Code and Translation: Deciphering the Blueprint of Life

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1. The following are all characteristics of the genetic code except: a) Universalb) Degeneratec) Non-overlappingd) Ambiguous Correct Answer: d) Ambiguous Explanation: The genetic code has several key characteristics: Universal → The same codons specify the same amino acids across nearly all organisms, with few exceptions (e.g., mitochondrial genomes). Degenerate → Multiple codons can code for

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Understanding DNA Repair: 15 High-Yield Case-Based Questions

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Test your knowledge of DNA damage and repair with 15 case-based multiple-choice questions (MCQs). This post covers essential repair mechanisms, including homologous recombination, base excision repair, mismatch repair, and nucleotide excision repair, with clinical applications in genomic instability, cancer biology, and radiation sensitivity. A must-read for medical students, geneticists, and oncology researchers!

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Case-Based Questions on DNA Replication | Prokaryotic & Eukaryotic DNA Replication Quiz

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Enhance your understanding of DNA replication with these clinical and experimental case-based questions on prokaryotic and eukaryotic replication mechanisms. Explore topics like Okazaki fragments, DNA polymerases, proofreading, telomerase, topoisomerases, and replication origins. Designed for medical students, biology enthusiasts, and researchers, these questions help apply molecular biology concepts in real-world scenarios.

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Case-Based MCQs on RNA Structure and Function: Test Your Knowledge

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Case 1: RNA Virus Mutation A researcher is studying a new RNA virus. Unlike DNA viruses, RNA viruses mutate more rapidly. The researcher finds that this rapid mutation is linked to the virus’s single-stranded RNA structure. Question 1: Why does the single-stranded nature of RNA contribute to the high mutation rate in RNA viruses? A)

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Case-Based Multiple-Choice Questions on DNA Structure and Organization

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Understanding DNA structure and organization is crucial in molecular biology and medicine. This guide covers key concepts like nucleosome assembly, euchromatin vs. heterochromatin, histone modifications, and DNA packaging, with exam-style case-based questions to enhance learning.

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Translation- Multiple-choice questions

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1. The following are all characteristics of the genetic code except: Universal Degenerate Non-overlapping Ambiguous 2. Which of the following statements is not true concerning the role of Aminoacyl t-RNA synthetases: Charging an aminoacyl t-RNA synthetase (loading) with an amino acid is an energetically favorable reaction. For every amino acid, there are several Aminoacyl t-RNA

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Molecular Biology-Multiple-choice questions (set-2)

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Q.1- Which statement best describes the ‘semi-conservative replication’ of DNA? A) In each replication cycle, only one of the two DNA strands is replicated B) In each replication cycle, one of the parental strands is conserved C) In each replication cycle, the daughter cells acquire either the parental stands or new stands D) Only half

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Molecular Biology- Multiple-choice questions (set-1)

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Q.1- A critical enzyme used directly in the synthesis of dTMP (thymidine) is a) Carbamoyl phosphate b) Aspartate Transcarbamylase c) Dihydrooratase d) Thymidylate synthase Q.2- In which phase of the cell cycle does DNA replication occur? a) G0 b) G1 c) S d) G2 Q.3-A 10-month-old baby boy presents with steatorrhea, recurrent pulmonary infections, GI

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