I. Start the exam by click the “Start” button
FATS AND FATTY ACID METABOLISM- Part 13
See all quizzes of FATS AND FATTY ACID METABOLISM- Part 13 here:
1 Long chain fatty acids are first activated
to acyl CoA in the
(A) Cytosol (B) Mitochodria
(C) Ribosomes (D) Microsome
2. Long chain acyl CoA penetrates mitochondria
in the presence of
(A) Palmitate (B) Carnitine
(C) Sorbitol (D) DNP
3. Acyl-CoA dehydrogenase converts Acyl
CoA to α – β unsaturated acyl-CoA in
presence of the coenzyme:
(A) NAD+ (B) NADP+
(C) ATP (D) FAD
4. For the activation of long chain fatty acids
the enzyme thiokinase requires the
cofactor:
(A) Mg++ (B) Ca++
(C) Mn++ (D) K+
5. ω-oxidation takes place by the
hydroxylase in microsomes involving
(A) Cytochrome b (B) Cytochrome c
(C) Cytochrome p-4500(D) Cytochrome a3
6. Carboxylation of acetyl—CoA to malonyl
— CoA takes place in presence of
(A) FAD+ (B) Biotin
(C) NAD+ (D) NADP+
7. Malonyl-CoA reacts with the central
(A) —SH group (B) —NH2 group
(C) —COOH group (D) —CH2OH group
8. Fatty acid synthesis takes place in the
presence of the coenzyme:
(A) NAD+ (B) Reduced NAD
(C) NADP+ (D) Reduced NADP
9. Fatty acids are activated to acyl CoA by
the enzyme thiokinase:
(A) NAD+ (B) NADP+
(C) CoA (D) FAD+
10. Phospholipids help the oxidation of
(A) Glycerol (B) Fatty acids
(C) Glycerophosphates(D) None of these
11. The desaturation and chain elongation
system of polyunsaturated fatty acids are
greatly diminished in the absence of
(A) Insulin (B) Glycagon
(C) Epinephrine (D) Thyroxine
12. Prostaglandins are liberated in the
circulation by the stimulation of
(A) Anterior pituitary glands
(B) Posterior pituitary glands
(C) Adrenal gland
(D) Thyroid gland
13. Prostaglandins have a common structure
based on prostanoic acid which contains
carbon atoms:
(A) 12 (B) 16
(C) 18 (D) 20
14. The carbon chains of prostanoic acid are
bonded at the middle of the chain by a
(A) 5-membered ring (B) 6-membered ring
(C) 8-membered ring (D) None of these
15. All active prostaglandins have atleast one
double bond between positions:
(A) 7 and 8 (B) 9 and 10
(C) 11 and 12 (D) 13 and 14
16. The enzyme systems for lengthening and
shortening for saturating and desaturating
of fatty acids occur in
(A) Intestine (B) Muscle
(C) Kidney (D) Liver
17. Which of the following are classified as
essential fatty acids?
(A) Arachidonic acid (B) Oleic acid
(C) Acetic acid (D) Butyric acid
18. Prostaglandins are synthesized in the
body from
(A) Myristic acid (B) Arachidonic acid
(C) Stearic acid (D) Lignoceric acid
19. All the following saturated fatty acids are
present in buffer except
(A) Butyric acid (B) Capryllic acid
(C) Caproic acid (D) Capric acid
20. Biological functions of lipids include
(A) Source of energy
(B) Insulating material
(C) Maintenance of cellular integrity
(D) All of these
21. Saponification number is
(A) mg of KOH required to saponify one gm of
fat or oil
(B) mg of KOH required to neutralize free fatty
acids of one gms of fat
(C) mg of KOH required to neutralize the acetic
acid obtained by saponification of one gm
of fat after it has been acetylated
(D) None of these
22. Lipids have the following properties:
(A) Insoluble in water and soluble in fat solvent
(B) High energy content
(C) Structural component of cell membrane
(D) All of these
23. Carbohydrate moiety in cerebrosides is
(A) Glucose (B) Sucrose
(C) Galactose (D) Maltose
24. Which of the following is not an unsaturated
fatty acid?
(A) Oleic acid (B) Stearic acid
(C) Linaoleic acid (D) Palmitic acid
25. All the following are functions of prostaglandins
except
(A) Lowering of B.P
(B) Introduction of labour
(C) Anti inflammatory
(D) Prevention of myocardial infraction
26. Calorific value of lipids per gm is
(A) 4 Kcal (B) 8 Kcal
(C) 9 Kcal (D) None of these
27. Fatty acid present in kerotin is
(A) Lignoceric acid (B) Cerebromic acid
(C) Nervonic acid (D) Hydroxynervonic acid
28. All the following are ketones except
(A) Xylulose (B) Ribolose
(C) Erythrose (D) Fructose
29. Saponification:
(A) Hydrolysis of fats by alkali
(B) Hydrolysis of glycerol by liposes
(C) Esterification
(D) Reduction
30. Number of ml of 0.1 N KOH required to
neutralize fatty acids from 5 gms of fat:
(A) Iodine number
(B) Polenske number
(C) Reichert-Miessl number
(D) None of these
