From 16 yrs back : AIIMS MAY 2008 Surgery question

See this AIIMS  May 2008 Question

Surgery : 142 in Guide

Q : In Which of the following head and neck cancers, is lymph node metastasis least common ?

a) Tongue.

b) Buccal Mucosa.

c) Hard Palate.

d) Lower Alveolus.

Answer is (C) Hard Palate.

16 years back : May 1993 AIIMS Surgey Question : 120

Q : Which carcinoma MOST Commonly metastasizes to cervical lymph nodes?

a) Maxillary Sinus.

b) Posterior Tongue.

c) Cheek.

d) Hard Palate.

Answer : Posterior Tongue.

Explanation given describes from Least Common to most Common. 

If anyone didn't read this question from the guide and missed in exam, they would know the value.

POINT IS : " Don't blindly recommend anyone to avoid old questions (>10 yrs)"

AIIMS MAY 2008 SPM

q.42 What is the best distribution to study the daily admission of head injury patients in a trauma care centre?

a) Normal Distribution

b) Binomial Distribution

c) Uniform Distribution

d) Poisson Distribution

Answer : (D)

For some brief notes ----> Poisson Distribution

AIIMS May 2008 Physiology Question

Phosphatidyl choline in a lipid monolayer, at pH of 3.5 leads to ?

a) Decreased surface potential
b) Increased Surface potential
c) Decreased Dipole moment
d) Zero Dipole moment.

Answer : ? B

This article I found might throw some light.

"Solution pH Alters Mechanical and Electrical Properties of Phosphatidylcholine Membranes: Relation between Interfacial Electrostatics, Intramembrane Potential, and Bending Elasticity"

Biophys J. 2007 April 1; 92(7): 2451–2462.

Published online 2006 December 15. doi: 10.1529/biophysj.106.096362.

Yong Zhou and Robert M. Raphael

"the membrane dipole potential increases as solution pH decreases"
which should rule out the last two options.


Now read this ---------

"At pH 2 and 3, SOPC vesicles have a positive ζ-potential, indicating extensive association of protons at the membrane surface. This agrees with other investigations demonstrating that phospholipids carry a positive ζ-potential at low pHs . At pH 4, the ζ-potential is nearly zero (∼3.5 mV) and the LUVs showed low mobility, in agreement with other investigations demonstrating that the isoelectric point of PC lipids is ∼pH 4 . At the near neutral pH of 6.5, the ζ-potential is clearly negative (∼−21 mV), in agreement with many investigations which have pointed out that PC is negatively charged between −10 mV and −30 mV at neutral pH"

-------------------


Therefore the answer might be (B). Increased Surface Potential

MAY 2008 : Anatomy

1. In case of Coarctation of Aorta which of the following is not involved ?

a. Vertebral A.
b. Posterior Intercostal A.
c. Axillary A.
d. Subscapular A.


Ans : A ( Vertebral Artery )

Reference : Gray's Anatomy 38th/e, Sec 10, CVS.


* Coarctation is due to an abnormality in development of the embryologic left fourth and sixth aortic arches.

* Coarctation of the aorta is a narrowing of the aorta most commonly found just distal to the origin of the left subclavian artery. Most patients with coarctation have juxtaductal coarctation. Older terms, such as preductal (infantile-type) or postductal (adult-type), are often misleading.

* Coarctation of the aorta occurs in 35% of patients with Turner syndrome.


2. Unilateral Injury to hypoglossal nerve to all except..

a. Hemiatrophy of involved palate.
b. Deviation of tongue towards the same side.
c. Loss of taste sensation in one half of the tongue.
d. Fasciculation of the tongue

Ans : C ( Loss of taste sensation in one half of the tongue.