

MCQOPTIONS
This section includes 126 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
1. |
Which of the following is/are included in Kingdom ? |
A. | Bacteria |
B. | Protozoa |
C. | Fungi |
D. | All of these |
Answer» B. Protozoa | |
2. |
A medicine which contain dead or weakened germs is used to prevent infectious disease is called a |
A. | antiseptic |
B. | antibodies |
C. | antibiotics |
D. | vaccine |
Answer» E. | |
3. |
Diseases which are caused by micro-organisms are called |
A. | contagious |
B. | venereal |
C. | infectious |
D. | incurable |
Answer» D. incurable | |
4. |
The pores in the bread is due to gas bubbles of |
A. | Oxygen |
B. | Nitrogen di oxide |
C. | Nitrogen |
D. | Carbon di oxide |
Answer» E. | |
5. |
The microbe for Malaria is carried by |
A. | Male Anopheles mosquito |
B. | Female Anopheles Mosquito |
C. | Male Aedes mosquito |
D. | Female Aedes mosquito |
Answer» C. Male Aedes mosquito | |
6. |
Deliberately injecting weak microbes into a healthy body and producing antibodies to fight against strong microbes is called _______ |
A. | Medication |
B. | Antibiotics |
C. | Vaccination |
D. | All of the above |
Answer» D. All of the above | |
7. |
Rhizobium found in root nodules of leguminous roots is an |
A. | Atmospheric Carbon fixer |
B. | Atmospheric Oxygen fixer |
C. | Atmospheric Nitrogen fixer |
D. | All of the above |
Answer» D. All of the above | |
8. |
Lactobacillus is commonly found in |
A. | Cake |
B. | Curd |
C. | Bread |
D. | All of the above |
Answer» C. Bread | |
9. |
The process of conversion of sugar into alcohol by yeast is called |
A. | Fermentation |
B. | Pasteurisation |
C. | Alcoholism |
D. | All of the above |
Answer» B. Pasteurisation | |
10. |
A common preservative used in jam and pickles is |
A. | Sodium benzoate |
B. | Nitric acid |
C. | Sodium Chloride |
D. | Copper Sulphate |
Answer» B. Nitric acid | |
11. |
Some medicines obtained from micro-organisms are applied to kill or stop the growth of disease-causing microorganisms. Such medicines are called ______. |
A. | Antibodies |
B. | Antibiotics |
C. | Antiseptics |
D. | All of the above |
Answer» C. Antiseptics | |
12. |
Which cannot fix atmospheric nitrogen in the soil? |
A. | Rhizobium |
B. | Clostridium |
C. | Azotobacter |
D. | Penicillin |
Answer» E. | |
13. |
The disease caused by protozoa is |
A. | tuberculosis |
B. | polio |
C. | typhoid |
D. | malaria |
Answer» E. | |
14. |
The microorganism which contains chlorophyll |
A. | Virus |
B. | Fungus |
C. | Algae |
D. | All |
Answer» D. All | |
15. |
Bacteria present in root nodules of pea |
A. | Coli |
B. | Plasmodium |
C. | Rhizobium |
D. | Penicillin |
Answer» D. Penicillin | |
16. |
The rod shaped bacteria are called |
A. | Bacillus |
B. | Coccus |
C. | Vibrio |
D. | Spirillum |
Answer» B. Coccus | |
17. |
The status of algae in the aquatic food chain is |
A. | consumers |
B. | producers |
C. | host |
D. | small in size |
Answer» C. host | |
18. |
What helps in the rise of bread or dosa dough? |
A. | Heat |
B. | Grinding |
C. | Growth of yeast cells |
D. | Low pressure |
Answer» D. Low pressure | |
19. |
Which of the following is a disease caused by protozoans? |
A. | Tuberculosis |
B. | Polio |
C. | Malaria |
D. | Typhoid |
Answer» D. Typhoid | |
20. |
Which organisms are microscopic and dependent on host organisms for reproduction? |
A. | Algae |
B. | Protozoa |
C. | Viruses |
D. | Bacteria |
Answer» D. Bacteria | |
21. |
______ is used for the production of alcohol and wine. |
A. | Yeast |
B. | Mosquito |
C. | Ant |
D. | Algae |
Answer» B. Mosquito | |
22. |
Which of the following diseases can be cured using antibiotics? |
A. | AIDS |
B. | Dengue |
C. | Typhoid |
D. | Malaria |
Answer» D. Malaria | |
23. |
The bacterium present in curd is: |
A. | Salmonella typhi |
B. | Lactobacillus |
C. | Penicillin |
D. | Vibrio cholera |
Answer» C. Penicillin | |
24. |
While baking cakes, yeast reproduces rapidly and produces ___ gas. |
A. | Hydrogen |
B. | Oxygen |
C. | carbon dioxide |
D. | nitrogen |
Answer» D. nitrogen | |
25. |
Vaccines are made up of: |
A. | Chemicals |
B. | Weak microorganisms |
C. | Viruses |
D. | Drugs |
Answer» C. Viruses | |
26. |
Which of the following is a communicable disease? |
A. | Diabetes |
B. | Chicken pox |
C. | Alzheimer s |
D. | Cancer |
Answer» C. Alzheimer s | |
27. |
Partial sterilization of a product such as milk at a high temperature is known as: |
A. | Pasteurization |
B. | Filtration |
C. | Pickling |
D. | Refrigeration |
Answer» B. Filtration | |
28. |
Living organisms which are invisible to the naked eye are called _________ . |
A. | Particles |
B. | Molecules |
C. | Microorganisms |
D. | Macroorganisms |
Answer» D. Macroorganisms | |
29. |
The shape of coccus bacteria is generally |
A. | Spherical |
B. | Rod like |
C. | Comma shaped |
D. | Spiral |
Answer» B. Rod like | |
30. |
Mycology is the study of |
A. | Bacteria |
B. | Fungi |
C. | Insects |
D. | Parasites |
Answer» C. Insects | |
31. |
Which among the following pathogens causes cholera? |
A. | Bacteria |
B. | Protozoan |
C. | Fungus |
D. | Virus |
Answer» B. Protozoan | |
32. |
Of all micro-organisms, the most adaptable and versatile are - |
A. | Viruses |
B. | Bacteria |
C. | Algae |
D. | Fungi |
Answer» C. Algae | |
33. |
Which among the following statements is not associated with food preservation? |
A. | Prevention of decay or spoilage |
B. | Decreased shelf life |
C. | Air-tight sealing |
D. | Storage for future use |
Answer» C. Air-tight sealing | |
34. |
Which one of the following is not produced by the process of fermentation? |
A. | Cheese |
B. | Milk |
C. | Yoghurt |
D. | Wine |
Answer» C. Yoghurt | |
35. |
A plant disease called citrus canker is caused by a _________ . |
A. | Bacteria |
B. | Fungi |
C. | Protozoa |
D. | Virus |
Answer» B. Fungi | |
36. |
Which one of the following is not a method of food preservation? |
A. | Salting |
B. | Drying |
C. | Boiling |
D. | Pickling |
Answer» D. Pickling | |
37. |
_______ are the agents that act as carriers of a pathogen and spread diseases. |
A. | Vectors |
B. | Microbes |
C. | Parasites |
D. | DNA |
Answer» B. Microbes | |
38. |
An infectious disease is ___________ . |
A. | caused only by bacteria |
B. | spread from person to person |
C. | spread from animal to animal |
D. | caused only by viruses |
Answer» C. spread from animal to animal | |
39. |
What is shape of an amoeba? |
A. | Spherical |
B. | Elongated |
C. | Spiral |
D. | No definite shape |
Answer» E. | |
40. |
Who discovered the process of fermentation? |
A. | Edward Jenner |
B. | Louis Pasteur |
C. | Jonas Salk |
D. | William Harvey |
Answer» C. Jonas Salk | |
41. |
The shape of Bacillus bacteria is generally |
A. | Spherical |
B. | Comma shaped |
C. | Rod like |
D. | Spiral |
Answer» D. Spiral | |
42. |
Which of these is an autotroph? |
A. | Cuscuta |
B. | Algae |
C. | Bacteria |
D. | Mushroom |
Answer» C. Bacteria | |
43. |
Rhizobium, the organism found in root nodules of legumes are |
A. | Bacteria |
B. | Fungi |
C. | Lichen |
D. | Algae |
Answer» B. Fungi | |
44. |
Organisms which take in nutrients from dead and decaying matter are called |
A. | Autotrophs |
B. | Heterotrophs |
C. | Saprotrophs |
D. | Autoheterotrophs |
Answer» D. Autoheterotrophs | |
45. |
A lichen is a composite organism consisting of |
A. | Algae & Bacteria |
B. | Bacteria & Virus |
C. | Virus &Fungi |
D. | Algae & Fungi |
Answer» E. | |
46. |
Spirogyra is a type of |
A. | Bacteria |
B. | Virus |
C. | Algae |
D. | Fungi |
Answer» D. Fungi | |
47. |
Baltimore system is used to classify |
A. | Viruses |
B. | Bacteria |
C. | Fungi |
D. | Protozoa |
Answer» B. Bacteria | |
48. |
Viruses that infect bacteria are called |
A. | Methanogens |
B. | Pathogens |
C. | Lichens |
D. | Bacteriophages |
Answer» E. | |
49. |
Agar is placed in a petri dish and some soil is sprinkled on the agar. The lid is placed on the petri dish, and it is incubated for two days. After two days, areas of bacteria and fungi are visible on the agar. What is the name for these areas? |
A. | Nutrient |
B. | Antibiotics |
C. | Microorganisms |
D. | Colonies |
Answer» E. | |
50. |
To which one of the following types of organism do mushrooms belong? |
A. | Algae |
B. | Ferns |
C. | Fungi |
D. | Lichens |
Answer» D. Lichens | |