Biology MCQ Questions PDF

Biology MCQ Questions 1. What is the main focus of biology? A. Study of the environment B. Study of living organisms and their vital processes C. Study of rocks and minerals D. Study of space 2. Which of the following is not a branch of biology? A. Botany B. Zoology C. Chemistry D....

Biology MCQ Questions 1. What is the main focus of biology? A. Study of the environment B. Study of living organisms and their vital processes C. Study of rocks and minerals D. Study of space 2. Which of the following is not a branch of biology? A. Botany B. Zoology C. Chemistry D. Anatomy 3. Which of the following is not a characteristic of living organisms? A. Reproduction B. Respiration C. Movement by physical means D. Cell division 4. Which organisms lack a true nucleus? A. Prokaryotes B. Eukaryotes C. Plants D. Fungi 5. What is the primary molecule for energy storage in living organisms? A. Proteins B. Lipids C. Carbohydrates D. Water 6. Which type of cell does not have a nuclear membrane?  A. Animal cells B. Plant cells C. Bacterial cells D. Fungal cells 7. What is the purpose of classification in biology? A. To separate organisms by size B. To group organisms based on shared characteristics C. To identify only plant names D. To classify only plants 8. What is the primary level of classification where organisms can interbreed? A. Family B. Class C. Genus D. Species 9. Where are most nucleic acids found in cells? A. Cytoplasm B. Nucleus C. Cell wall D. Mitochondria 10. Who first proposed a classification system with three kingdoms? A. Carolus Linnaeus B. Robert Whittaker C. Ernst Haeckel D. Charles Darwin 11. Which kingdom includes multicellular, non-motile organisms? A. Bacteria B. Protista  C. Plants D. Animals 12. What classification system did Robert Whittaker propose in 1969? A. Two-kingdom system B. Three-kingdom system C. Five-kingdom system D. Seven-kingdom system 13. In which classification system are bacteria divided into Eubacteria and Archaebacteria? A. Two-domain system B. Three-domain system C. Five-domain system D. Six-domain system 14. Which type of cell has DNA enclosed within a nuclear membrane? A. Bacteria B. Protists C. Prokaryotes D. Subcellular particles 15. Who proposed the grouping of organisms into plants and animals? A. Carolus Linnaeus B. Aristotle C. Ernst Haeckel D. Robert Whittaker 16. Which of the following is considered non-living? A. Bacteria B. Viruses C. Protists D. Plants 17. What is the highest level of classification in the three-domain system? A. Kingdom B. Family C. Genus D. Domain 18. Which group includes organisms that thrive in extreme environments? A. Eubacteria B. Archaebacteria C. Protists D. Fungi 19. What is the molecular structure characteristic of viruses? A. DNA only B. RNA only C. Protein only D. DNA or RNA surrounded by a protein coat 20. What is the definition of a chromosome? A. A molecule that stores energy B. A molecule that builds proteins C. A structure that contains genetic material D. A component in the cell membrane 21. Which of the five kingdoms includes single-celled organisms with diverse feeding methods? A. Plant Kingdom B. Protist Kingdom C. Fungi Kingdom D. Animal Kingdom 22. What structure primarily distinguishes eukaryotic cells? A. Absence of a nucleus  B. Presence of a nucleus and nuclear membrane C. Presence of DNA only D. Lack of organelles 23. Which of the following is not part of the Protista kingdom? A. Algae B. Bacteria C. Amoeba D. Euglena 24. What term describes a group of organisms sharing the same gene pool? A. Species B. Genus C. Kingdom D. Class 25. Which of the following classifications is the most inclusive? A. Family B. Genus C. Kingdom D. Species Answers: 1. B 2. C 3. C 4. A 5. C 6. C 7. B 8. D 9. B 10. C 11. C 12. C 13. B 14. B 15. B 16. B 17. D 18. B 19. D 20. C 21. B 22. B 23. B 24. A 25. C