MCQS Module 1

1.Complications of stellate ganglion block are all except?

A. Mediastinitis
B. Cardiac arrest
C. Pneumothorax
D. Mueller’s syndrome

Correct answer : D. Mueller’s syndrome

Mueller’s syndrome is a sign of successful stellate ganglion block in which there is warmth of the face and injection of the tympanic membrane.

2.Which nutritional deficiency is associated with hereditary ataxia?

A. Vitamin B12
B. Vitamin B1
C. Vitamin E
D. Vitamin C

Correct answer:
C. Vitamin E

Explanation:

There are two types of hereditary ataxia associated with abnormalities of Vitamin E.
Abetalipoproteinemia – Impairment of formation and secretion of VLDL in liver resulting in deficiency of delivery of Vitamin E to tissues including central and peripheral nervous system.
Ataxia with Vitamin E deficiency (AVED) – Impaired binding of Vitamin E to VLDL, resulting in deficiency of Vitamin E in peripheral tissues.

Reference: Harrison’s Principles of Internal Medicine, 19th edition, p2630

3.A young male patient presented with urethral discharge. On urine examination pus cells were found but no organisms. Which method would be the best for culture.

a) Mc coy cell line
b) Thayer martin medium
c) L J medium
d) Levinthal medium

Correct answer : a) Mc coy cell line

Common causes of urethral discharge in a young male are gonococcus and chlamydia. But in this case, no organisms were found in the pus cells. This indicates that the cause is probably not gonococcus. So in order to check for presence of chlamydia, we have to use cell culture methods such as Mc coy cells.

4.Brazilian purpuric fever is caused by?

A. Haemophilus haemolyticus
B. Haemophilus aphrophilus
C. Haemophilus aegyptius
D. Haemophilus parainfluenzae

Correct answer : C. Haemophilus aegyptius

Haemophilus colonies on blood agarHaemophilus colonies on blood agar

Brazilian purpuric fever is caused by Haemophilus aegyptius.
It is characterised by conjunctivitis which proceeds to fulminant septicemia in infants and children.
There is high fatality.
It was first recognized in Brazil in 1984.

Ref: Ananthanarayan and Paniker’s Textbook of Microbiology, 9th edition, p330,331.

5.Blood supply to head and neck of femur is mainly from?

A. Superficial epigastric artery
B. Medial circumflex femoral artery
C. Lateral circumflex femoral artery
D. Artery of ligamentum teres

Correct answer : B. Medial circumflex femoral artery

BLOOD SUPPLY TO HEAD AND NECK OF FEMUR

The blood supply to the head and neck of femur comes from:
Extracapsular arterial ring located at the base of neck of femur
Artery of ligamentum teres
Epiphyseal arteries
Metaphyseal arteries

The extracapsular arterial ring is formed by:
Posteriorly by branches of medial circumflex femoral artery (major part of blood supply)
Anteriorly by branches of lateral circumflex femoral artery
Smaller branches from superior and inferior gluteal artery

Both medial and lateral circumflex femoral arteries are branches of profunda femoris artery.

Artery of ligamentum teres
It is a branch of obturator artery.
It contributes a small but variable amount of blood supply.

6.In which of the following uveitic conditions is it contraindicated to put in an intraocular lens after cataract surgery?
A. Fuch’s heterochromic cyclitis
B. Juvenile rheumatoid arthritis
C. Psoriatic arthritis
D. Reiter’s syndrome

Correct answer : B. Juvenile rheumatoid arthritis (JRA)

There is a high incidence of cataract in those with JRA. But implantation of intraocular lens following cataract surgery is associated with high risk for development of fibrosis, secondary retrolental membranes and lens capture.

7.Which one of the following stromal dystrophy is a recessive condition?
A. Lattice dystrophy
B, Granular dystrophy
C. Macular dystrophy
D. Fleck dystrophy

Correct answer : C. Macular dystrophy

It is autosomal recessive

8.The most common second malignancy in survivors of retinoblastoma is:
A. Thyroid cancer
B. Nasopharyngeal carcinoma
C. Optic glioma
D. Osteosarcoma

Correct answer : D. Osteosarcoma

Osteosarcoma and retinoblastoma both can arise in those with RB gene mutation

.

9.Retinal isomerase catalyses the conversion of?

A. 11-cis retinal to rhodopsin
B. All trans retinal to 11-cis retinal
C. Lumirhodopsin to metarhodopsin
D. Bathorhodopsin to lumirhodopsin

Correct answer : B. All trans retinal to 11-cis retinal

When light energy is absorbed by rhodopsin, photoactivation of electrons in the retinal portion of rhodopsin leads to the change of cis form of retinal into the all trans form.
The first stage in the reformation of rhodopsin is to reconvert the all trans retinal into 11 cis retinal.
This process is catalysed by the enzyme – retinal isomerase.

Ref: Textbook of Medical Physiology, Guyton and Hall, 11th edition, page 629.

10.Retinal isomerase catalyses the conversion of?

A. 11-cis retinal to rhodopsin
B. All trans retinal to 11-cis retinal
C. Lumirhodopsin to metarhodopsin
D. Bathorhodopsin to lumirhodopsin

Correct answer : B. All trans retinal to 11-cis retinal

When light energy is absorbed by rhodopsin, photoactivation of electrons in the retinal portion of rhodopsin leads to the change of cis form of retinal into the all trans form.
The first stage in the reformation of rhodopsin is to reconvert the all trans retinal into 11 cis retinal.
This process is catalysed by the enzyme – retinal isomerase.

Ref: Textbook of Medical Physiology, Guyton and Hall, 11th edition, page 629.

11: Frontal Sinus can be best visualised by:

Options:
A) Towne’s view

B) Caldwell’s view

C) Water’s view

12.Schuller’s view2: Intranasal approach is used for accessing all organs except:1

Options:
A) Lacrimal gland

B) Pituitary gland

C) Optic nerve

D) Cerebellum

13: Regarding Cochlear implant, which of the following is true:

Options:
A) Not contraindicated in cochlear malformation

B) Contraindicated in < 5 yrs

C) Indicated in mild to moderate hearing loss

D) Implanted through oval window

14: Immediate treatment of CSF rhinorrhea is:

Options:
A) Pack with sterile petrollium jelly gauge

B) Wait for 7-10 days with antibiotics

C) Blow the nose repeatedly

D) Surgery

15. Carcinoma oesophagus disseminates very fast because

Options:
A) Oesophagus lacks mucosal layer

B) Oesophagus lacks serosal layer

C) Oesophagus has very rich lymphatic net work

D) None of the above

16.The characteristic pattern of calcification seen in spleen in the non contrast CT section of abdomen shown in the image above is seen in

A Tuberculosis
B. Histoplasmosis
C. Brucellosis
D Melioidosis

Explanation :

This characteristic concentric layers of calcification giving a target appearance is seen in Splenic Brucellosis