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Mcqs MBBS Exams India
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(Single Best Answer) Question 51: S.A. node acts as a pacemaker of the heart because of the fact that it ?
A) Is capable of generating impules spontaneously
B) Has rich sympathetic innervation
C) Has poor cholinergic innervation
D) Generates impulses at the highest rate
Answer (Select an option above to get the answer):
(Single Best Answer) Question 52: In which of the following a reduction in arterial oxygen tension occurs ?
A) CO poisoning
B) Anaemia
C) Moderate exercise
D) Hypoventilation
Answer (Select an option above to get the answer):
(Single Best Answer) Question 53: Distribution of blood flow is mainly regulated by the ?
A) Arteries
B) Arterioles
C) Capillaries
D) Venules
Answer (Select an option above to get the answer):
(Single Best Answer) Question 54: Barr Body is found in the following phase of the cell cycle ?
A) Interphase
B) Telophase
C) Metaphase
D) G1 phase
Answer (Select an option above to get the answer):
(Single Best Answer) Question 55: All of the following vascular changes are observed in acute inflammation, except ?
A) Vasodilation
B) Stasis of blood
C) Increased vascular permeability
D) Decreased hydrostatic pressure
Answer (Select an option above to get the answer):
(Single Best Answer) Question 56: One of the following is not penicillinase susceptible ?
A) Amoxicillin
B) Penicillin G
C) Piperacillin
D) Cloxacillin
Answer (Select an option above to get the answer):
(Single Best Answer) Question 57: All of the following are topically used sulphonamides except ?
A) Sulphacetamide
B) Sulphadiazine
C) Silver sulphadiazine
D) Mafenide
Answer (Select an option above to get the answer):
(Single Best Answer) Question 58: Prolonged administration of streptomycin may result in damage to the ?
A) Optic nerve
B) Auditory nerve
C) Trigeminal nerve
D) Facial nerve
Answer (Select an option above to get the answer):
(Single Best Answer) Question 59: A woman with infertility receives an ovary transplant from her sister who is an identical twin. What type of graft is it ?
A) Autograft
B) Allograft
C) Isograft
D) Xenograft
Answer (Select an option above to get the answer):
(Single Best Answer) Question 60: It is true regarding the normal microbial flora present on the skin and mucous membrane that ?
A) It is absent in the stomach due to acidic pH
B) It establishes in the body only after the neonatal period
C) It cannot be eradicated by antimicrobial agents
D) The flora in the small bronchi is similar to that of the trachea
Answer (Select an option above to get the answer):