Test Your Knowledge - Free MCQ PRACTICE
by Saksham Chaudhry : Paschim Vihar, New Delhi 110063 T: 1142316457, 9810570740
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A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. Which of the following gram-positive bacteria causes pharyngitis (sore throat)?
A. Neisseria 
B. Streptococcus 
C. Staphylococcus 
D. Mycobacterium 

2. Which statement is true about flavouring materials spices, garlic etc. added to Dill pickles?
A. These markedly stimulate or inhibit the acid forming bacteria 
B. They may be source of considerable numbers of undesirable micro-organisms and cause off-fermentations or spoilage of pickles 
C. They may improve texture of the pickle 
D. None of these 

3. Parasitic infection/s frequently observed in HIV disease is / are.
A. Cryptosporidiosis 
B. Toxoplasmosis 
C. Isosporiasis 
D. All of these 

4. The predominant micro-organisms in frozen foods are
A. Bacteria 
B. Micro-coccus 
C. Yeast and moulds 
D. None of these 

5. In cellular metabolism, O2 is used
A. In glycolysis 
B. To provide electrons for photophosphorylation 
C. As a terminal electron acceptor 
D. In the Krebs cycle 

6. Which of the following disinfectants act by disrupting microbial membranes?
A. Cationic detergents 
B. Halogens 
C. Heavy metals 
D. Aldehydes 

7. The microbiological examination of coliform bacteria in foods preferably use
A. MacConkey broth 
B. Violet Red Bile agar 
C. Eosine Methylene blue agar 
D. All of these 

8. Which of the following is responsible for a musty or earthy flavor?
A. Actinomycetes 
B. Flavobacterium 
C. Both A and  
D.  

9. Which of the following is/are included in Kingdom Prokaryotae?
A. Bacteria 
B. Protozoa 
C. Fungi 
D. All of these 

10. The membranes of which domains are chemically the most similar?
A. Membranes of all three domains are chemically identical 
B. Eukarya and Archaea 
C. Bacteria and Eukarya 
D. Archaea and Bacteria 

11. Viruses require __________ for growth.
A. Bacteria 
B. Plants 
C. Animals 
D. Living cells 

12. A bacterial food intoxication refers to
A. Illness caused by presence of pathogens 
B. Food borne illness caused by the presence of a bacterial toxin formed in food 
C. Both A and B 
D. None of the above 

13. 15 Year old complains of loose motion, intermittent abdominal pain of 1year wet mount of stool shows multiple ova> 100 microns in length. Which of the following agent is responsible
A. Ophistotichus viverni 
B. Gastrodiscoides Hominis 
C. Ancyclostoma Caninum 
D. Fosciola Gigantica 

14. The manufacture of baker's yeast involve
A. S. cerevisiae 
B. S. thermophillus 
C. Bacillus subtilis 
D. None of these 

15. The sulfur pearl of Namibia, Thiomargarita namibiensis
A. Is the worlds largest bacterium 
B. Stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume 
C. Both A and B 
D. Is the worlds smallest bacterium 

16. Colonies resembling molar teeth are produced by
A. Actinomyces israelii 
B. N. asteroids 
C. Actinomadura madurae 
D. Nocardia brasiliensis 

17. Culture of tubercle bacilli may be positive if number of bacteria in the specimen is
A. As few as 125-200 per ml 
B. As few as 10-100 per ml 
C. As few as 5-9 per ml 
D. As few as 1-4 per ml 

18. Identify the bacteria which is oxidase-negative and catalase-positive?
A. Staphylococcus 
B. Streptococcus 
C. Neisseria 
D. Pseudomonas 

19. Suppose a eukaryotic cell had a mutation that prevented the production of cytochrome c. As a result of this mutation, which of the following processes would not occur?
A. Cellular respiration 
B. Photosynthesis 
C. Mitosis 
D. Cell wall synthesis 

20. The ability of FADH to be oxidized is __________ than the ability of FAD to be oxidized.
A. Greater 
B. Lesser 
C. Approximately equal 
D. Half 

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