The history and development of cell and molecular biology trace discoveries from microscopy and cell theory to DNA structure, central dogma, and modern genomic technologies. B. Pharm students benefit from understanding pioneers (Hooke, Leeuwenhoek, Schleiden, Virchow, Watson & Crick), classical experiments (Griffith, Avery, Hershey-Chase), and landmark techniques like PCR, Sanger and next‑generation sequencing, recombinant DNA and CRISPR. This foundation links cellular structure and function to molecular mechanisms relevant to pharmacology, drug targets, and biotechnology. These concise, exam-focused MCQs with answers reinforce key concepts, methodologies, and timelines, preparing you for practical and theoretical questions in pharmacy curricula. Now let’s test your knowledge with 30 MCQs on this topic.
Q1. Who first coined the term “cell” after observing cork under a microscope?
- Antonie van Leeuwenhoek
- Matthias Schleiden
- Robert Hooke
- Theodor Schwann
Correct Answer: Robert Hooke
Q2. Which scientist is credited with creating powerful simple microscopes and describing living microorganisms?
- Robert Hooke
- Antonie van Leeuwenhoek
- Rudolf Virchow
- Louis Pasteur
Correct Answer: Antonie van Leeuwenhoek
Q3. Who proposed the classical cell theory that plants and animals are composed of cells?
- Gregor Mendel
- Matthias Schleiden and Theodor Schwann
- Santiago Ramón y Cajal
- Alexander Fleming
Correct Answer: Matthias Schleiden and Theodor Schwann
Q4. Which scientist asserted that all cells arise from pre-existing cells?
- Rudolf Virchow
- Robert Hooke
- Antonie van Leeuwenhoek
- Thomas Hunt Morgan
Correct Answer: Rudolf Virchow
Q5. Who are credited with proposing the double helix structure of DNA?
- James Watson and Francis Crick
- Rosalind Franklin and Maurice Wilkins
- Erwin Chargaff and Oswald Avery
- Gregor Mendel and Thomas Morgan
Correct Answer: James Watson and Francis Crick
Q6. Which study provided early evidence that DNA is the hereditary material?
- Griffith’s transformation experiment
- Avery–MacLeod–McCarty experiment
- Hershey–Chase experiment
- Meselson–Stahl experiment
Correct Answer: Avery–MacLeod–McCarty experiment
Q7. The Hershey–Chase experiment used which radioactive isotope to label DNA?
- Sulfur-35
- Phosphorus-32
- Carbon-14
- Nitrogen-15
Correct Answer: Phosphorus-32
Q8. Chargaff’s rules state which pairing relationship among DNA bases?
- Adenine pairs with guanine
- A equals T and G equals C
- Pyrimidines are more abundant than purines
- Cytosine pairs with adenine
Correct Answer: A equals T and G equals C
Q9. Rosalind Franklin’s key contribution to DNA history was:
- Proposing the central dogma
- Producing X-ray diffraction images of DNA
- Discovering the triple helix of DNA
- Developing PCR
Correct Answer: Producing X-ray diffraction images of DNA
Q10. The central dogma of molecular biology describes which flow of information?
- Protein → RNA → DNA
- DNA → RNA → Protein
- RNA → DNA → Protein
- DNA → Protein → RNA
Correct Answer: DNA → RNA → Protein
Q11. Who invented the polymerase chain reaction (PCR)?
- Kary Mullis
- Frederick Sanger
- Marshall Nirenberg
- Walter Gilbert
Correct Answer: Kary Mullis
Q12. Sanger sequencing is based on what principle?
- Template switching during replication
- Chain termination using dideoxynucleotides
- Mass spectrometry of digested proteins
- Real-time fluorescence incorporation
Correct Answer: Chain termination using dideoxynucleotides
Q13. Restriction endonucleases commonly recognize what type of DNA sequences?
- Highly methylated regions
- Palindromic sequences
- Random single-stranded regions
- Promoter TATA boxes
Correct Answer: Palindromic sequences
Q14. Agarose gel electrophoresis separates nucleic acids primarily by:
- Charge alone irrespective of size
- Sequence composition
- Size (molecular length)
- Three-dimensional conformation only
Correct Answer: Size (molecular length)
Q15. Which blotting technique is used to detect specific DNA sequences?
- Northern blot
- Western blot
- Southern blot
- Eastern blot
Correct Answer: Southern blot
Q16. Which blotting method is used to analyze RNA expression?
- Southern blot
- Northern blot
- Western blot
- Dot blot
Correct Answer: Northern blot
Q17. Western blotting is primarily used to detect:
- DNA fragments
- RNA transcripts
- Proteins
- Lipids
Correct Answer: Proteins
Q18. The foundational recombinant DNA experiments in the 1970s are credited to which pair?
- Cohen and Boyer
- Watson and Crick
- Mullis and Sanger
- Jacob and Monod
Correct Answer: Cohen and Boyer
Q19. A plasmid is best described as:
- A linear fragment of chromosomal DNA
- An extrachromosomal circular DNA molecule
- A ribonucleoprotein complex
- A membrane-bound organelle
Correct Answer: An extrachromosomal circular DNA molecule
Q20. The operon model in prokaryotic gene regulation was proposed by:
- Watson and Crick
- Jacob and Monod
- Chargaff and Franklin
- Mullis and Sanger
Correct Answer: Jacob and Monod
Q21. Which organism is a unicellular eukaryote widely used as a model in molecular biology?
- Escherichia coli
- Saccharomyces cerevisiae
- Drosophila melanogaster
- Caenorhabditis elegans
Correct Answer: Saccharomyces cerevisiae
Q22. The endosymbiotic theory explains the origin of which organelles?
- Golgi apparatus and endoplasmic reticulum
- Mitochondria and chloroplasts
- Lysosomes and peroxisomes
- Ribosomes and centrosomes
Correct Answer: Mitochondria and chloroplasts
Q23. The fluid mosaic model describes which cellular structure?
- Chromatin organization
- Cytoskeleton dynamics
- Plasma membrane structure
- Mitochondrial cristae
Correct Answer: Plasma membrane structure
Q24. CRISPR-Cas9 technology is primarily used for:
- Protein sequencing
- Genome editing
- RNA splicing
- Chromatography separation
Correct Answer: Genome editing
Q25. RNA interference (RNAi) reduces gene expression through:
- siRNA-mediated mRNA degradation
- Increasing DNA methylation globally
- Enhancing ribosomal translation
- Protein ubiquitination and degradation
Correct Answer: siRNA-mediated mRNA degradation
Q26. Telomerase maintains chromosome ends by:
- Adding telomeric repeats using an RNA template
- Cleaving telomeric DNA each cell cycle
- Ligating linear chromosome ends
- Removing RNA primers from Okazaki fragments
Correct Answer: Adding telomeric repeats using an RNA template
Q27. Which technique provides quantitative measurement of gene expression in real time?
- Conventional PCR
- Real-time quantitative PCR (qPCR)
- Southern blotting
- Northern blotting
Correct Answer: Real-time quantitative PCR (qPCR)
Q28. A major advantage of next-generation sequencing (NGS) over Sanger sequencing is:
- Lower error rates for long reads only
- Massively parallel sequencing of millions of fragments
- Absolute elimination of sequence bias
- Requirement for no library preparation
Correct Answer: Massively parallel sequencing of millions of fragments
Q29. Proteomics is the large-scale study of:
- Genes and their sequences
- RNA transcriptomes
- Proteins and their functions
- Metabolites in a cell
Correct Answer: Proteins and their functions
Q30. Which tumor suppressor protein is a key regulator of the cell cycle and DNA damage response?
- Cyclin D
- p53
- EGFR
- Myc
Correct Answer: p53
