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Mcqs MBBS Exams India
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(Single Best Answer) Question 51: Virus mediated transfer of host DNA from one cell to another is known as ?
A) Transduction
B) Transformation
C) Transcription
D) Integration
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(Single Best Answer) Question 52: HIV can be detected and confirmed by ?
A) Polymerase Chain Reaction (PCR)
B) Reverse Transcriptase - PCR
C) Real Time PCR
D) Mimic PCR
Answer (Select an option above to get the answer):
(Single Best Answer) Question 53: In the small intestine, cholera toxin acts by ?
A) ADP-ribosylation of the G regulatory protein
B) Inhibition of adenyl cyclase
C) Activation of GTPase
D) Active absorption of NaCl
Answer (Select an option above to get the answer):
(Single Best Answer) Question 54: A 40 years old man underwent kidney transplantation for end stage renal disease. Two months after transplantation, he developed fever and features suggestive of bilateral diffuse interstitial pneumonia. Which one of the following is the most likely etiological agent ?
A) Herpes simplex virus
B) Cytomegalovirus
C) Epstein - Barr virus
D) Varicella Zoster virus
Answer (Select an option above to get the answer):
(Single Best Answer) Question 55: All of the following are true regarding Haemophilus influenzae except ?
A) It can be a part of the normal flora in some persons
B) The serotyping is based on the bacterial outer membrane proteins
C) It requires Haemin and NAD for growth in culture medium
D) Type b is responsible for invasive disease
Answer (Select an option above to get the answer):
(Single Best Answer) Question 56: A 22 years old male patient presents with a complaint of severe itching and white scaly lesions in the groin for past one month. Which of the following is most likely to be the causative agent ?
A) Trichophyton rubrum
B) Candida albicans
C) Candida glabrata
D) Malassezia furfur
Answer (Select an option above to get the answer):
(Single Best Answer) Question 57: A patient, resident of Himachal Pradesh presented with a series of ulcers in a row, on his right leg. The biopsy from the affected area was taken and cultured on Sabauraud's Dextrose agar. What would be the most likely causative organism ?
A) Sporothrix schenkii
B) Cladosporium spp.
C) Pseudoallescheria boydii
D) Nocardia brasiliensis
Answer (Select an option above to get the answer):
(Single Best Answer) Question 58: The following fungi are thermally dimorphic, except ?
A) Sporothrix schenkii
B) Cryptococcus neoformans
C) Blastomyces dermatitis
D) Histoplasma capsulatum
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(Single Best Answer) Question 59: The following phenomenon is responsible for antibiotic resistance in bacteria due to slime production ?
A) Co-aggregation
B) Biofilm formation
C) Mutation evolving an altered target site for antibiotics
D) Mutation evolving a target bypass mechanism
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(Single Best Answer) Question 60: An elderly diabetic has left sided orbital cellulites. CT Scan of paranasal sinuses shows evidence of left maxillary sinusitis. Gram stained smear of the orbital exudate shows irregularly branching septate hyphae. The following is the most likely etiological agent ?
A) Aspergillus
B) Rhizopus
C) Mucor
D) Candida
Answer (Select an option above to get the answer):