11. Bacteria play a crucial role in the nitrogen cycle by:
a) releasing oxygen into the atmosphere
b) converting nitrogen gas into a usable form for plants
c) decomposing dead organisms
d) causing diseases in plants
12. Which bacterial genus is responsible for causing tuberculosis?
a) Mycobacterium
b) Streptococcus
c) Escherichia
d) Bacillus
13. Bacteria are classified based on their shape into three categories. Which of the following is NOT one of them?
a) cocci
b) bacilli
c) spirilla
d) cones
14. Bacteria can be classified based on their oxygen requirement. Which of the following is NOT one of the classifications?
a) aerobic
b) anaerobic
c) facultative anaerobic
d) microaerophilic
15. Bacterial flagella are primarily involved in:
a) protein synthesis
b) replication
c) locomotion
d) waste elimination
