91. Cold sterilization refers to the process of sterilization by use of____________________?
A. Ultra violet rays
B. Ultrasonic vibrations
C. Infrared rays
D. Gamma rays
✅ The correct answer is option Gamma rays.
Microbiology MCQs
92. Which regards to temperature requirement, most pathogenic bacteria are_____________?
A. Psychrophiles
B. Mesophiles
C. Cryophiles
D. Thermophiles
✅ The correct answer is option Mesophiles.
93. Portion of immunoglobulin molecule with molecular weight to 50000_________________?
A. Secretory piece
B. H chain
C. L chain
D. J piece
✅ The correct answer is option H chain.
94. The serum concentration of which of the following human IgG subclass is maximum ?
A. IgG1
B. IgG2
C. IgG3
D. IgG4
✅ The correct answer is option IgG1.
95. Causative organism of Kalahazar is_______________?
A. Plasmodium ovaie
B. Leishman donovani
C. Entamoeba histolytica
D. Toxoplasma
✅ The correct answer is option Leishman donovani.
96. Erysipelas is caused by________________?
A. Group B staphylococci
B. Group A steptococci
C. Gonococci
D. Pneumococci
✅ The correct answer is option Group B staphylococci.
97. Delhi boil refer to_______________?
A. Solar Keratosis
B. Malignant pustule
C. L. Tropica sore
D. Venereal ulcer
✅ The correct answer is option L. Tropica sore.
98. Certain viruses have been isolated in crytalline form and have been found to be_____________?
A. Nucleotides
B. Phospholipids
C. Scleroproteins
D. Nucleoproteins
✅ The correct answer is option Nucleoproteins.
99. All of the following infections may be transmitted be dental instruments except____________?
A. HIV
B. Hepatitis C
C. Hepatitis B
D. Hepatitis E
✅ The correct answer is option Hepatitis E.
100. The difference between sterilization and disinfection is that_______________?
A. Disinfection kills all spores but sterilization does not
B. Sterilization kills all spores but disinfection does not
C. Sterilization involves chemicals and disinfection involves physical methods
D. Sterilization is easier to achieve
✅ The correct answer is option Sterilization kills all spores but disinfection does not.