1. Process of tissue culture is known as? Chemical propagation Macro propagation Vegetative propagation Micro propagation 2. Australian antigen is associated with: AIDS Hepatitis B surface antigen in acute hepatitis Chronic leukemia Basal cell carcinoma 3. Correct order of phases in bacterial growth curve: Decline, log, lag, stationery Log, lag, stationery, decline Stationery, log, lag, decline Lag, log, stationery, decline 4. Physical sterilization was discovered by: Alexander Flemings John Hunter Joseph Lister Robert Koch 5. The genetic ability of a bacterium to grow in the presence of several antibiotics is passed from one bacterium to other by Conjugation Rarefaction Transduction Transformation 6. Gram -ve bacteria stain during gram staining: Blue color Red color Colorless Green 7. The mechanism by which most fungi cause disease Exotoxin production Lecithinase production Coagulase production Hypersensitivity 8. Organ of locomotion in bacteria is Cell wall Flagella Fimbria Capsule 9. For uniform staining reaction, morphology & biochemical activity, it is advisable to study bacterial cultures during the Stationary phase Death phase Lag phase Logarithmic phase 10. Graft versus host reaction is caused by Monocytes Leukocytes B-lymphocytes T-lymphocytes 11. All are true about Widal test except one Baseline titer differ depending on endemicity of the disease Antibiotic treatment can modify results H agglutinins cannot differentiate between types agglutinins lasts longer and hence is not indicative of recent infection 12. The medium of choice for growing most fungi is Thioglycollet medium Sabourauds agar Blood Agar Tissue culture 13. All of the following organisms are known to survive intracellularly except: Neisseria meningitides. Salmonella typhi. Streptococcus pyogenes. Legionella pneumophila. 14. Which of the following structures, found external to the bacterial cell wall, are involved in bacterial attachment to cell surfaces? Pili Flagella Capsule Mesosomes 15. Virus mediated transfer of host DNA from one cell to another is known as: Transduction. Integration. Transformation. Transcription. 16. Which of these is true about antibodies: IgM is an acute phase reactant IgE mediated delayed hypersensitivity IgM is seen in secondary response Secretory part of IgA is synthesized by plasma cells 17. Leprosy bacilli are transmitted from person to person by all except From open sore Discharge from nasal mucosa Through intact skin Through breast milk 18. Moist heat kills all of the following EXCEPT: Brucella Coxiella burnetti Mycobacterium Salmonella 19. Delayed tuberculin test response is due to Monocytes Histiocytes B Lymphocytes T lymphocytes 20. Opacity around colonies of Clostridium perfringens is due to – Cytokinin Theta toxin Desmotase Lecithinase Loading … Question 1 of 20