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Mcqs MBBS Exams India
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(Single Best Answer) Question 81: Ladder pattern of DNA electrophoresis in apoptosis is caused by the action of the following enzyme ?
A) Endonuclease
B) Transglutaminase
C) DNAse
D) Caspase
Answer (Select an option above to get the answer):
(Single Best Answer) Question 82: Which one of the following statements about Hemoglobin S (HbS) is not true ?
A) Hemoglobin HbS differs from hemoglobin HbA by the substitution of Val for Glu in position 6 of the beta chain
B) One altered peptide of Hb S migrates faster towards the cathode (-) than the corresponding peptide of HbA
C) Binding of HbS to the deoxygenated HbA can extend the polymer and cause sickling of the red blood cells
D) Lowering the concentration of deoxygenated Hb S can prevent sickling
Answer (Select an option above to get the answer):
(Single Best Answer) Question 83: Which one of the following acts to increase the release of Ca2+ from endoplasmic reticulum ?
A) Inositol triphosphate
B) Parathyroid hormone
C) 1,25-dihydroxy cholecalciferol
D) Diacyglycerol
Answer (Select an option above to get the answer):
(Single Best Answer) Question 84: The molecular weight of a protein can be determined by ?
A) Native Poly Acrylamide Gel Electrophoresis (PAGE)
B) Sodium Dodecyl Sulphate h-PAGE
C) Isoelectric focusing
D) Ion Exchange Chromatography
Answer (Select an option above to get the answer):
(Single Best Answer) Question 85: A 59-year-old man complains of recurrent attacks of pain in the region of left shoulder radiating to sternum and the pit of stomach. The attacks of pain came at lengthy intervals Until the last two days when it became continuous. The physician diagnosed it as angina pectoris. In this case the pain pathway from the heart is carried by ?
A) Superior cervical cardiac nerve
B) Middle and Inferior cervical cardiac nerve
C) Thoracic splanchnic nerve
D) Vagus
Answer (Select an option above to get the answer):
(Single Best Answer) Question 86: Which one of the following amino acids is most likely to be found in the transmembrane region of a protein ?
A) Lysine
B) Arginine
C) Leucine
D) Aspartate
Answer (Select an option above to get the answer):
(Single Best Answer) Question 87: Knowledge of the segmental cutaneous innervation of the skin of the lower extremity is important in determining the level of intervertebral disk disease. Thus, S1 nerve root irritation will result in pain located along the ?
A) Anterior aspect of the thigh
B) Medial aspect of the thigh
C) Anteromedial aspect of the leg
D) Lateral side of the foot
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(Single Best Answer) Question 88: Venous drainage from neurohypophysis is routed through all of the following except ?
A) Portal vessels to adenohypophysis
B) Superior hypophyseal veins to ventricular tanycytes
C) Inferior hypophyseal veins to dural venous sinuses
D) Capillaries to median eminence and hypothalamus
Answer (Select an option above to get the answer):
(Single Best Answer) Question 89: The efferent fiber bundle of the substance nigra transmits dopamine to one of the following areas ?
A) Thalamus
B) Corpus striatum
C) Tegmentum of pons
D) Tectum of midbrain
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(Single Best Answer) Question 90: A posteriorly perforating ulcer in the pyloric antrum of the stomach is likely to produce initial localized peritonitis or abscess formation in the ?
A) Greater sac
B) Left subhepatic and hepatorenal spaces (pouch of Morrison)
C) Omental bursa
D) Right subphrenic space
Answer (Select an option above to get the answer):