MCQOPTIONS
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MCQOPTIONS
This section includes 34 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The word Archaeobacteria (a division of bacteria) derived from Greek means |
| A. | True bacteria |
| B. | False bacteria |
| C. | Recent bacteria |
| D. | Ancient bacteria |
| Answer» E. | |
| 2. |
Who coined the term Animalcules for microorganisms like Bacteria and protozoa? |
| A. | Robert Koch |
| B. | Louis Pasteur |
| C. | Alexander Fleming |
| D. | Leeuwenhoek |
| Answer» E. | |
| 3. |
Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture? |
| A. | Robert Koch |
| B. | Louis Pasteur |
| C. | Alexander Fleming |
| D. | Leeuwenhoek |
| Answer» B. Louis Pasteur | |
| 4. |
Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch? |
| A. | A specific organism can always be found in association with a given disease |
| B. | The organism can be isolated and grown in pure culture in the laboratories |
| C. | The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so. |
| D. | It is possible to recover the organism in pure culture from the experimentally infected animals. |
| Answer» D. It is possible to recover the organism in pure culture from the experimentally infected animals. | |
| 5. |
Which of the following structure is not present in all the bacteria? |
| A. | Cell membrane |
| B. | Chromatin bodies |
| C. | Ribosomes |
| D. | Capsule |
| Answer» E. | |
| 6. |
The size of Spirochete is |
| A. | 0.1 -600 um |
| B. | 100-200 nm |
| C. | 500 um |
| D. | 0.75-1.25 um |
| Answer» D. 0.75-1.25 um | |
| 7. |
E. coli and example of |
| A. | Aerobic bacteria |
| B. | Anaerobic bacteria |
| C. | Facultative bacteria |
| D. | Microaerophilic |
| Answer» D. Microaerophilic | |
| 8. |
Spirochete is an example of |
| A. | Aerobic bacteria |
| B. | Anaerobic bacteria |
| C. | Facultative bacteria |
| D. | Microaerophilic |
| Answer» C. Facultative bacteria | |
| 9. |
Sex pili is formed in which of the following processes: |
| A. | Binary fission |
| B. | Mitosis |
| C. | Sexual reproduction |
| D. | Conjugation |
| Answer» E. | |
| 10. |
Chemical substances used on living tissues that inhibit the growth of micro organism are called |
| A. | Antiseptics |
| B. | Disinfectants |
| C. | Antibiotics |
| D. | Vaccines |
| Answer» B. Disinfectants | |
| 11. |
Cyanobacteria have _____ cell wall |
| A. | Gram +ve. |
| B. | Gram - ve. |
| C. | Acid fast |
| D. | Cellulose rich |
| Answer» C. Acid fast | |
| 12. |
Cyanobacteria reproduce by: |
| A. | Binary fission |
| B. | Mitosis |
| C. | Meiosis |
| D. | Conjugation |
| Answer» B. Mitosis | |
| 13. |
Which of the following bacteria do not have flagella commonly? |
| A. | Cocci |
| B. | Bacilli |
| C. | Streptobacilli |
| D. | Vibrio |
| Answer» B. Bacilli | |
| 14. |
Flagella originate from |
| A. | Cell membrane |
| B. | Cell wall |
| C. | Capsule |
| D. | Basal body |
| Answer» E. | |
| 15. |
Which of the following structure primarily helps in attachment of bacteria on various surfaces? |
| A. | Flagella |
| B. | Pili |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 16. |
Which of the following structure provides greater pathogenicity to the bacteria? |
| A. | Capsule |
| B. | Slime |
| C. | Cell Wall |
| D. | Cell membrane |
| Answer» C. Cell Wall | |
| 17. |
Cell wall is absent in |
| A. | Cocci |
| B. | Bacilli |
| C. | Mycobacterium |
| D. | Mycoplasma |
| Answer» E. | |
| 18. |
Cell wass of Archaeobacteria does not contain |
| A. | Peptidoglycan |
| B. | Proteins |
| C. | Glycoproteins |
| D. | Polysaccharides |
| Answer» B. Proteins | |
| 19. |
Gram positive bacteria appear |
| A. | Purple |
| B. | Red |
| C. | Pink |
| D. | Blue |
| Answer» B. Red | |
| 20. |
Extremely long molecule of DNA that is tightly folded to fit inside the cell component is called |
| A. | Nucleus |
| B. | Chromosome |
| C. | Chromatid |
| D. | Chromatin body |
| Answer» E. | |
| 21. |
The common waste material in bacteria is |
| A. | Glycogen |
| B. | Lactic acid |
| C. | Ammonia |
| D. | Urea |
| Answer» C. Ammonia | |
| 22. |
Example of bacteria requiring low concentration of oxygen is |
| A. | Campylobactor |
| B. | Spirocheta |
| C. | E-coli |
| D. | Pseudomonas |
| Answer» B. Spirocheta | |
| 23. |
Purple non-sulphur bacteria is an example of |
| A. | Heterotrophic bacteria |
| B. | Chemosynthetic bacteria |
| C. | Photosynthetic bacteria |
| D. | Saprotrophic bacteria |
| Answer» D. Saprotrophic bacteria | |
| 24. |
Those bacteria which are fully dependent upon their host for nutrition are called |
| A. | Heterotrophic bacteria |
| B. | Chemosynthetic bacteria |
| C. | Saprophytic bacteria |
| D. | Parasitic bacteria |
| Answer» E. | |
| 25. |
Nitrifying bacteria are the examples of |
| A. | Hetrotrophic bacteria |
| B. | Chemosynthetic bacteria |
| C. | Saprophytic bacteria |
| D. | Parasitic bacteria |
| Answer» C. Saprophytic bacteria | |
| 26. |
E. coli and example of entrobacteriace is important for causing diarrheal diseases its size is: |
| A. | 0.1-600 um |
| B. | 100-200 nm |
| C. | 1.1-1.5 um (width) 2.0-6.0 um (length) |
| D. | 0.75-1.25 um |
| Answer» D. 0.75-1.25 um | |
| 27. |
In bacterial categories the bacteria smaller in number are |
| A. | Gram-ive bacteria |
| B. | Eubacteria |
| C. | Ancient bacteria |
| D. | Gram +ive bacteria |
| Answer» D. Gram +ive bacteria | |
| 28. |
Germ theory of disease has ______ postulates |
| A. | 3 |
| B. | 5 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 29. |
Some bacteria ranging occasionally a size of 500 ?m in length are |
| A. | Escherichia coli |
| B. | Spirochetes |
| C. | Mycoplasma |
| D. | Epulopiscuim |
| Answer» C. Mycoplasma | |
| 30. |
Coccobacillus has a shape similar to |
| A. | Diplobacillus |
| B. | Sarcina |
| C. | Egg |
| D. | None of these |
| Answer» D. None of these | |
| 31. |
The first bacterium isolated was |
| A. | Coccus |
| B. | Bacillus |
| C. | Vibrio |
| D. | Spirochete |
| Answer» C. Vibrio | |
| 32. |
Which of the following bacteria are thick rigid and spiral? |
| A. | Vibrio |
| B. | Spirillum |
| C. | Spirochete |
| D. | Coccus |
| Answer» C. Spirochete | |
| 33. |
A group of 8 cocci is called |
| A. | Diplococci |
| B. | Octococci |
| C. | Tetrad |
| D. | Sarcina |
| Answer» E. | |
| 34. |
Which of the following has a chain arrangement? |
| A. | Streptobacillus |
| B. | Streptococci |
| C. | Staphylococci |
| D. | Both A and B |
| Answer» E. | |