BIOCHEMISTRY

2. Lipid Chemistry
Presented By
Ayman Elsamanoudy
Salwa Abo El-khair
7

3.  A lipid containing alcoholic amine residue is all
except:
(A) Phosphatidic acid
(B) Ganglioside
(C) Glucocerebroside
(D) Sphingomyelin
 Kerasin consists of
(A) Nervonic acid
(B) Lignoceric acid
(C) Cerebronic acid
(D) Arachidonic acid3

4.  Molecular formula of cholesterol is
(A) C27H45OH
(B) C28H49OH
(C) C29H47OH
(D) C23H41OH
 Which of the following is omega-3
polyunsaturated fatty acid?
(A) Linoleic acid
(B) Linolenic acid
(C) Palmitoleic acid
(D) Arachidonic acid
4

5.  Acylsphingosine is also known as
(A) Sphingomyelin
(B) Ceramide
(C) Cerebroside
(D) Sulphatide
 All the following have 18 carbon atoms
except
(A) Linoleic acid
(B) Linolenic acid
(C) Arachidonic acid
(D) Stearic acid5

6.  Cholesterol is transported from liver to
extrahepatic tissues by
(A) Chylomicrons
(B) VLDL
(C) HDL
(D) LDL
 The cyclic ring present in all the steroids:
(A) Cyclopentano perhydrophenanthrene
(B) Nitropentano
(C) both (A) and (B)
(D) None of these6

7.  Instead of ester link plasmalogens possess
an ether link in position:
(A) α
(B) β
(C) γ
(D) None of these
 The concentration of sphingomyelins are
increased in
(A) Gaucher’s disease
(B) Fabry’s disease
(C) Fabrile disease
(D) Niemann-Pick disease
7

8.  Sphingomyelins contain a complex
amino alcohol named as
(A) Serine
(B) Lysolecithin
(C) Sphingosine
(D) Glycol
 Δ9 indicates a double bond between
carbon atoms of the fatty acids:
(A) 8 and 9
(B) 9 and 10
(C) 9 and 11
(D) 9 and 12
8

9.  The prostaglandins are synthesized from
(A) Arachidonic acid
(B) Oleic acid
(C) Linoleic acid
(D) Palmitic acid
 Depot fats of mammalian cells comprise
mostly of
(A) Cholesterol
(B) Cholesterol esters
(C) Triacyl glycerol
(D) Phospholipids9

10.  A fatty acid which is not synthesized in the body and
has to be supplied in the diet is:
(A) Palmitic acid
(B) Stearic acid
(C) Linolenic acid
(D) Palmitoleic acid
 The number of double bonds in arachidonic acid is
(A) 2
(B) 3
(C) 4
(D) 6
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11. Case History
Case I
Underweight female was born at 27 weeks of pregnancy
( pre-term baby).
With rapid heart rate, increased respiratory rate .
Chest X-ray revealed bilateral lung collapse.
Care plan included maintenance IV fluids and treatment using
surfactants as 100ml/kg.
a. What is your possible diagnosis?
b. What is the biochemical basis of this case ?
c. Explain the structure of the deficient substance.

12. 11/17/2014 12Ahmed A.Albadry
GREAT
THANKS
Ayman Elsamanoudy
Salwa Abo El-khair