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Lipids (GATE - XL)

LIPIDS, GATE - Life Science

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is a wax-like organic substance formed by the anaerobic bacterial hydrolysis of fat in tissue?

  1. Adipocere
  2. Shell lipid
  3. Archaeol
  4. Caldarchaeol
  5. Ceramide
Question 2 Multiple Choice (Single Answer)

Which of the following lipids induces mechanical hypersensitivity when injected into rats?

  1. Lipid A
  2. Lactosylceramide
  3. Isopropyl palmitate
  4. Ether lipid
  5. N,N-Dimethylsphingosine
Question 3 Multiple Choice (Single Answer)

Which of the following statements is/are false about 2-arachidonyl glyceryl ether?

P. It is a reputed endocannabinoid that was discovered by Lumír Hanus.
Q. The production of this endocannabinoid is enhanced in normal rat aorta on reacting with carbachol.
R. It potently enhances the blood pressure in rats and represents an endothelium-derived hypotension factor.

  1. Only P
  2. Only Q
  3. Only R
  4. Only P and Q
  5. Only Q and R
Question 4 Multiple Choice (Single Answer)

Which of the following pairs is/are incorrectly matched?

  1. Sphingomyelin - helps in cellular growth and detection of unhealthy cells
  2. Phosphatidylethanolamine - comprises the backbone of cell membranes and contributes to the fluidity and structural environment of the cell
  3. Phosphatidylserine - positive effect on memory and helps maintain cholesterol level
  1. Only 1
  2. Only 2
  3. Only 3
  4. Only 1 and 2
  5. Only 2 and 3
Question 5 Multiple Choice (Single Answer)

Match the following:

 
Column - I Column - II
P. Anandamide 1. Amide of hexadecanoic acid
Q. N-Palmitoylethanolamine 2. Amide of polyunsaturated omega-6 fatty acid
R. N-Docosahexaenoylethanolamine 3. Amide of octadecanoic acid
S. N-Stearoylethanolamine 4. Amide of cervonic acid
  1. P - 1, Q - 2, R - 3, S - 4
  2. P - 2, Q - 1, R - 4, S - 3
  3. P - 3, Q - 2, R - 1, S - 4
  4. P - 4, Q - 3, R - 2, S - 1
  5. P - 1, Q - 2, R - 4, S - 3
Question 6 Multiple Choice (Single Answer)

Which of the following amino lipids occurs naturally in the body of animals that accumulates in the cerebrospinal fluid during sleep deprivation and induces sleep in animals?

  1. 1,2-Dioleoyl-sn-glycerophosphoethanolamine
  2. Oleamide
  3. Palmitoylcarnitine
  4. N-Acylethanolamine
  5. Arachidonyl-2'-chloroethylamide
Question 7 Multiple Choice (Single Answer)

Match the following:

 
List I List II
(i) Linoleic acid a. Saturated fatty acid containing cyclopentane ring
(ii) Palmitoleic acid b. Saturated fat
(iii) Lauric acid c. Monounsaturated fat
(iv) Prostanoic acid d. Polyunsaturated fat
  1. (i) - d, (ii) - c, (iii) - b, (iv) - a
  2. (i) - a, (ii) - c, (iii) - b, (iv) - d
  3. (i) - c, (ii) - d, (iii) - b, (iv) - a
  4. (i) - d, (ii) - b, (iii) - c, (iv) - a
  5. (i) - b, (ii) - d, (iii) - a, (iv) - c
Question 8 Multiple Choice (Single Answer)

Which of the following statements is/are correct about sulfoquinovosyl diacylglycerol?

  1. It is a phosphorus-free lipid that is found in many photosynthetic organisms.
  2. It is synthesised from UDP-sulfoquinovose and triacylglycerol.
  3. It degrades during chlorine starvation in some species, such as Chlamydomonas reinhardtii.
  1. Only 1
  2. Only 2
  3. Only 3
  4. Only 1 and 2
  5. Only 2 and 3
Question 9 Multiple Choice (Single Answer)

Assertion (A): Palmitoylethanolamide cannot strictly be considered as a classic endocannabinoid.
Reason (R): It lacks affinity for the cannabinoid receptors CB1 and CB2.

  1. A and R both are correct and R is the correct explanation of A.
  2. A and R both are correct and R is not the correct explanation of A.
  3. A is correct and R is incorrect.
  4. A is incorrect and R is correct.
  5. A and R both are incorrect.
Question 10 Multiple Choice (Single Answer)

Which of the following lipids contain(s) a backbone of aliphatic amino alcohols?

  1. Monolaurin
  2. Ceramide
  3. Mortuary wax
  4. N-Acyl amides
  5. Glycosylceramides
Question 11 Multiple Choice (Single Answer)

Which of the following lipids is/are used in the investigational treatment of asymptomatic patients with adrenoleukodystrophy?

  1. Lorenzo's oil
  2. Ethylhexyl palmitate
  3. Oxylipins
  4. Monoacylglycerols
  5. Chlorosulpholipids
Question 12 Multiple Choice (Single Answer)

Assertion (A): Saturated fats are useful to manufacturers of food preservatives.
Reason (R): Various fats contain different proportions of saturated and unsaturated fat.

  1. A and R both are correct and R is the correct explanation of A.
  2. A and R both are correct and R is not the correct explanation of A.
  3. A is correct and R is incorrect.
  4. A is incorrect and R is correct.
  5. A and R both are incorrect.
Question 13 Multiple Choice (Single Answer)

Which of the following statements regarding sphingosine-1-phosphate is false?

  1. Sphingosine-1-phosphate is a signaling sphingolipid.
  2. Sphingosine is released from ceramides, a process catalysed by the enzyme ceramidase.
  3. Sphingosine-1-phosphate is a blood borne lipid mediator.
  4. The levels of sphingosine-1-phosphate are 5 to 10 times up-regulated in ovarian cancer patients' ascites.
  5. Administration of sphingosine-1-phosphate protects oocytes from chemotherapeutic agents in vitro only.
Question 14 Multiple Choice (Single Answer)

Which of the following pairs is incorrectly matched?

  1. Siponimod - investigational drug for multiple sclerosis
  2. Resolvin - lipid which possesses a sulphur-containing functional group
  3. Galactolipid - type of glycolipid whose sugar group is galactose
  4. Phospholipid - consists of two hydrophobic fatty acids and a hydrophilic phosphate
  5. Saccharolipid - fatty acid linked directly to a sugar backbone
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