MCQs

1. Bacteria belong to the kingdom:
(a) Protista (b) Fungi (c) Monera (d) Plantae

2. Bacteria are:
(a) Multicellular organisms (b) Most abundant micro-organisms (c) Only found in water (d) Visible to naked eye

3. Which of the following is a spherical bacterium?
(a) Bacillus (b) Spirillum (c) Vibrio (d) Coccus

4. Rod-shaped bacteria are called:
(a) Cocci (b) Vibrios (c) Bacilli (d) Spirilla

5. Comma-shaped bacteria are known as:
(a) Cocci (b) Spirilla (c) Vibrios (d) Bacilli

6. Spiral-shaped bacteria are called:
(a) Spirilla (b) Cocci (c) Bacilli (d) Vibrios

7. Autotrophic bacteria synthesise food from:
(a) Dead matter (b) Organic substances (c) Inorganic substrates (d) Parasites

8. Bacteria that prepare food using light energy are:
(a) Saprophytes (b) Chemosynthetic autotrophs (c) Photosynthetic autotrophs (d) Parasites

9. Most bacteria are:
(a) Autotrophic (b) Heterotrophic (c) Multicellular (d) Photosynthetic

10. Archaebacteria living in extremely salty conditions are called:
(a) Methanogens (b) Thermoacidophiles (c) Halophiles (d) Cyanobacteria

11. Archaebacteria found in hot springs are:
(a) Halophiles (b) Thermoacidophiles (c) Methanogens (d) Cyanobacteria

12. Methanogens are commonly found in:
(a) Desert sand (b) Human blood (c) Gut of ruminants (d) Snow regions

13. Methanogens help in the production of:
(a) Oxygen (b) Ethanol (c) Methane (d) Nitrogen

14. Cyanobacteria are also known as:
(a) Green algae (b) Blue-green algae (c) Red algae (d) Brown algae

15. Photosynthetic pigment present in cyanobacteria is:
(a) Chlorophyll b (b) Chlorophyll c (c) Chlorophyll a (d) Xanthophyll

16. Special nitrogen-fixing cells in cyanobacteria are called:
(a) Flagella (b) Heterocysts (c) Spores (d) Pili

17. Nostoc and Anabaena are examples of:
(a) Fungi (b) Protozoa (c) Cyanobacteria (d) Archaebacteria

18. Chemosynthetic autotrophic bacteria obtain energy by:
(a) Photosynthesis (b) Oxidation of inorganic substances (c) Decomposition (d) Fermentation

19. Which of the following is a bacterial disease?
(a) Malaria (b) Cholera (c) Amoebiasis (d) Ringworm

20. Bacteria mainly reproduce by:
(a) Budding (b) Fragmentation (c) Binary fission (d) Spore formation only

21. Under unfavourable conditions bacteria produce:
(a) Flowers (b) Seeds (c) Spores (d) Gametes

22. Mycoplasma differ from other bacteria because they:
(a) Have chlorophyll (b) Lack a cell wall (c) Are multicellular (d) Have a nucleus

23. Mycoplasma are:
(a) Largest bacteria (b) Smallest living cells known (c) Photosynthetic organisms (d) Non-living particles

24. Which bacteria help in making curd from milk?
(a) Pathogenic bacteria (b) Heterotrophic bacteria (c) Lactobacillus acidophilus (d) Cyanobacteria

25. Citrus canker is caused by:
(a) Virus (b) Fungus (c) Bacteria (d) Protozoa