MCQ: Biological classification

21. What is the primary role of heterotrophic bacteria in nature?
a) Photosynthesis
b) Decomposition
c) Nitrogen fixation
d) Methane production

22. Which of the following is NOT an example of a pathogenic bacterium?
a) V. cholera (Cholera)
b) S. typhi (Typhoid)
c) C. tetani (Tetanus)
d) Cyanobacteria

23. How do bacteria primarily reproduce?
a) Budding
b) Fragmentation
c) Fission
d) Spore formation

24. Some bacteria can transfer DNA to other bacteria. What is this process called?
a) Fission
b) Fragmentation
c) Conjugation
d) Spore formation

25. Mycoplasma are unique among bacteria because they lack a __________.
a) Nucleus
b) Cell membrane
c) Cell wall
d) Cytoplasm

26. What is the primary role of Mycoplasma in animals and plants?
a) Nitrogen fixation
b) Photosynthesis
c) Pathogenicity
d) Oxygen production

27. Which bacterial group is known for fixing nitrogen in legume roots?
a) Archaebacteria
b) Eubacteria
c) Cyanobacteria
d) Mycoplasma

28. Samllest bacterium belong to which group of bacteria?
a) Cyanobacteria
b) Archaebacteria
c) Eubacteria
d) Mycoplasma