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. The immediate source of the flat sour bacteria is usually the
A. plant equipment
B. sugar
C. starch
D. soil
2. The membranes of which domains are chemically the most similar?
A. Archaea and Bacteria
B. Bacteria and Eukarya
C. Eukarya and Archaea
D. membranes of all three domains are chemically identical
3. Which of the following lymphokine(s) is secreted by delayed-type-hypersensitivity cells?
A. Macrophage stimulating factor
B. Migration inhibiting factor
C. Macrophage activating factor
D. All of the above
4. Giemsa stained smear of epithelial cells obtained from a newborn with hepatosplenomegaly is shown below. What is the most likely cause of this congenital infection?
A. CMV
B. Rubella
C. HIV
D. Ebstein-Barr virus
5. Which of the following viruses is star-shaped in outline and transmitted by the faecal-oral route?
A. Astrovirus
B. Calicivirus
C. Hepatitis E virus
D. Hepatitis D virus
6. Which of the following gram-negative bacteria is/are not aerobic?
A. Pseudomonas
B. Neisseria
C. Escherichia
D. None of these
7. Animal viruses with capsids displaying helical symmetry include
A. measles and mumps
B. influenza
C. rabies
D. all of these
8. Which of the following test indicates the susceptibility to streptococcal pyrogenic exotoxin?
A. Schick test
B. Disk test
C. ASO test
D. Precipitation test
9. The genus/genera that belongs to the family Micrococcaceae is
A. Micrococcus
B. Staphylococcus
C. Planococcus
D. All of these
10. Which of the following is responsible for a musty or earthy flavor?
A. Actinomycetes
B. Flavobacterium
C. both A and
D.
11. Which of the following is not the biofertilisers producing bacteria?
A. Nostoc
B. Anabaena
C. Both A and B
D. Clostridium
12. The phospholipids present in cytoplasm membrane of eubacteria is mainly
A. phosphoglycerides
B. polyisoprenoid
C. phospholipoprotein
D. none of these
13. Chemical precipitation of phosphorus is
A. primary treatment
B. secondary treatment
C. tertiary treatment
D. both A and B
14. Which of the following is correct for CD8 T cells?
A. CD8 T cells only recognize virus-infected cells
B. CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells
C. In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only
D. CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
15. Antibodies to which of the following antigens of Bacillus anthracis are protective?
A. Capsular polypeptide
B. Somatic polysaccharide
C. Anthrax toxin
D. None of these
16. 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
17. Which of the following serotypes of Salmonella does not produce H2S?
A. S choleraesuis
B. S paratyphi A
C. Both A and B
D. None of these
18. The evolutionary record suggests that the first occurrence of multicellularity was in the kingdom
A. Monera
B. Protista
C. Fungi
D. Plantae
19. Most spoilage bacteria grow at
A. acidic pH
B. alkaline pH
C. neutral pH
D. any of the pH
20. The staphylococcal intoxication refers to presence of
A. an enterotoxin
B. neurotoxin
C. mycotoxin
D. All of these
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