1. Which of the following is absent in prokaryotic cells?
Answer: C. Membrane-bound nucleus and organelles
Biology Class 11 Unit 6: Prokaryotes MCQs
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2. The five-kingdom system was introduced in 1969 by:
Answer: B. Robert H. Whittaker
3. The kingdom Monera for all prokaryotes was designated in 1988 by:
Answer: C. Lynn Margulis and Karlene Schwartz
4. Phylogenetics is the study of:
Answer: B. evolutionary relatedness among groups of organisms
5. The three-domain system includes:
Answer: B. Bacteria, Archaea and Eukarya
6. Carl Woese in 1977 identified that archaea have:
Answer: B. a separate evolutionary lineage from bacteria
7. Ancestors of present bacteria emerged on earth about:
Answer: C. 4 billion years ago
8. The most recent common ancestor of bacteria and archaea was probably a:
Answer: B. hyperthermophile
9. Archaea differ from bacteria because archaeal cell walls lack:
Answer: B. peptidoglycan
10. Introns are present in some genes of:
Answer: B. archaea
11. RNA polymerase of archaea is:
Answer: B. complex, similar to eukaryotes
12. Membrane lipids of archaea have:
Answer: B. branched carbon chains
13. Methane producing archaea are called:
Answer: B. methanogens
14. Methanobacterium smithii lives in the:
Answer: C. human gut
15. Salt-loving archaea are called:
Answer: B. halophiles
16. An example of a halophile is:
Answer: B. Halobacterium halobium
17. Archaea which thrive in hot and acidic conditions are:
Answer: C. thermoacidophiles
18. An example of a thermoacidophile is:
Answer: C. Thermoplasma acidophilum
19. The study of bacteria is called:
Answer: B. bacteriology
20. Bacteria were first discovered in 1674 by:
Answer: B. Antonie van Leeuwenhoek
21. Leeuwenhoek called the bacteria he saw:
Answer: C. animalcules
22. The name "bacterium" was introduced in 1882 by:
Answer: C. Christian Gottfried Ehrenberg
23. The Greek word "bakteria" means:
Answer: B. little stick
24. Hair-like structures on the bacterial surface which help in adhesion are:
Answer: B. pili
25. Pili are made up of the protein:
Answer: B. pilin
26. Endospores in bacteria provide:
Answer: B. a means of survival in harsh conditions
27. Branching cell chains or filaments are a feature of the bacterial group:
Answer: C. actinomycetes
28. Actinomycetes are very common in:
Answer: C. soil
29. The oldest branch of the bacterial domain is:
Answer: B. Aquificales
30. The group with Escherichia and Salmonella is:
Answer: B. Proteobacteria (purple bacteria)
31. Staphylococcus, Clostridium and Bacillus belong to:
Answer: C. Gram-positive bacteria
32. Nostoc, Anabaena and Oscillatoria are:
Answer: B. cyanobacteria
33. Chlorobium is a:
Answer: B. green sulfur bacterium that does not produce oxygen
34. Cyanobacteria are also called:
Answer: C. blue-green algae
35. The word "cyano" means:
Answer: C. blue
36. Cyanobacteria are a type of:
Answer: B. Gram-negative bacteria
37. Cyanobacteria can live in hot springs up to:
Answer: C. 85 degrees
38. Cyanobacteria in association with fungi form:
Answer: B. lichens
39. Cyanobacteria are believed to be among the first life forms to:
Answer: B. colonize land
40. Photosynthesis in cyanobacteria takes place in:
Answer: B. extensive membrane system in the outer zone of cytoplasm
41. Cyanobacteria release oxygen during photosynthesis. They are responsible for:
Answer: B. oxygen in the primitive atmosphere
42. Sexual reproduction in cyanobacteria is:
Answer: C. absent
43. Akinetes are:
Answer: B. enlarged resting cells of filament
44. The thick-walled cells with no nuclei where nitrogen fixation occurs in cyanobacteria are called:
Answer: C. heterocysts
45. Hormogonia are formed by:
Answer: B. fragmentation of filament next to heterocyst
46. In Pakistan cyanobacteria like Nostoc and Anabaena are cultivated to:
Answer: C. enhance soil fertility by nitrogen fixation
47. The outermost component common to all bacteria is the:
Answer: C. cell wall
48. The cell wall is absent in:
Answer: C. Mycoplasma
49. The bacterial cell wall is made of:
Answer: C. peptidoglycan
50. Peptidoglycan is also called:
Answer: B. murein or mucopeptide
About Biology Class 11 Unit 6 MCQs (Federal Board)
These 227 Biology MCQs cover Class 11 Unit 6: Prokaryotes of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 5 pages of 50. Use the Print button to save this chapter as a PDF.