1. Which of the following is unique to gram-negative bacteria?

Question 1 of 20

2. A young male presents with loose motions and 'intermittent abdominal pain over the past ,1 year Wet mount stool specimen showed the presence of multiple ova which are more than 100? in diameter. The causative organisms for the disease shall not include

Question 2 of 20

3. Which of the following is the most frequently employed diagnostic laboratory technique for the microscopic detection of antigens in tissue secretions or in cell suspensions?

Question 3 of 20

4. All are true regarding disinfectants except -

Question 4 of 20

5. Which type of hypersensitivity reaction listed below is characterized by a specific cytotropic antibody (IgE) that binds to receptors on basophils and mast cells and reacts with a specific antigen?

Question 5 of 20

6. Visceral larva migrans is associated with:

Question 6 of 20

7. Which of the following is an enrichment medium?

Question 7 of 20

8. Optimal time and temperature required for sterilization in an autoclave is

Question 8 of 20

9. A person presents with pneumonia. His sputum was sent for culture. The bacterium obtained was gram positive cocci in chains and alpha haemolytic colonies on sheep agar. Which of the following will help in confirming the diagnosis -

Question 9 of 20

10. Which of the following is true about streptococcus pneumoniae:

Question 10 of 20

11. Filters used in biological safety cabinets:

Question 11 of 20

12. Antigen antibody precipitation is maximally seen in which of the following

Question 12 of 20

13. First chemical barrier encountered by microorganism for common exposed sites -

Question 13 of 20

14. A patient presents with signs of pneumonia. The bacterium obtained from sputum was a gram positive cocii which showed alpha hemolysis on sheep agar. Which of the following test will help to confirm the diagnosis?

Question 14 of 20

15. Nagglers reaction detects-

Question 15 of 20

16. Most sensitive test for Treponema -

Question 16 of 20

17. Half-Life of free HIV in plasma is:

Question 17 of 20

18. The process of gene transfer between bacterial cells that involves the uptake of naked DNA molecules is classified as which of the following?

Question 18 of 20

19. Which of the following represents the phenotypic expression of both alleles in a gene pair

Question 19 of 20

20. All of the following infections may be transmitted by dental instruments except

Question 20 of 20