Chapter 116 – MCQs for Lab (Biochemistry)

5751 to 5800 MCQs for Lab Technician and Technologist Exam Preparation

5000 Plus MCQs for Lab Technician and Technologists are designed to test the knowledge and proficiency of laboratory professionals who work in the field of clinical laboratory science. These questions cover a wide range of topics related to laboratory science, including anatomy, physiology, microbiology, chemistry, and hematology.

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Questions 5751 to 5800

Acylsphingosine is also known as
- Sphingomyelin
- Ceramide✔
- Cerebroside
- Sulphatide
The highest phospholipids content is found in
- Chylomicrons
- VLDL
- LDL
- HDL✔
The major lipid in chylomicrons is
- Triglycerides ✔
- Phospholipids
- Cholesterol
- Free fatty acids
Number of carbon atoms in cholesterol is
- 17
- 19
- 27✔
- 30
The lipoprotein richest in cholesterol is
- Chylomicrons
- VLDL
- LDL ✔
- HDL
The major storage form of lipids is
- Esterified cholesterol
- Glycerophospholipids
- Triglycerides ✔
- Sphingolipids
Cerebonic acid is present in
- Triglycerides
- Cerebrosides ✔
- Esterified cholestrol
- Sphingomyelin
The nitrogenous base in lecithin is
- Ethanolamine
- Choline ✔
- Serine
- Betaine
All the following are omega-6-fatty acids except
- Linoleic acid
- α-Linolenic acid ✔
- γ-Linolenic acid
- Arachidonic acid
All the following have 18 carbon atoms except
- Linoleic acid
- Linolenic acid
- Arachidonic acid ✔
- Stearic acid
A 20-carbon fatty acid among the following is
- Linoleic acid
- α -Linolenic acid
- β -Linolenic acid
- Arachidonic acid ✔
Triglycerides are transported from liver to extrahepatic tissues by
- Chylomicrons
- VLDL ✔
- HDL
- LDL
Cholesterol is transported from liver to extrahepatic tissues by
- Chylomicrons
- VLDL
- HDL
- LDL ✔
Elevated plasma level of the following projects against atherosclerosis:
- Chylomicrons
- VLDL
- HDL ✔
- LDL
All the following amino acids are nonessential except
- Alanine
- Histidine ✔
- Cysteine
- Proline
Sulphydryl group is present in
- Cysteine ✔
- Methionine
- Both (A) and (B)
- None of these
Oligosaccharide-pyrophosphoryl dolichol is required for the synthesis of
- N-linked glycoproteins ✔
- O-linked glycoproteins
- GPI-linked glycoproteins
- All of these
In N-linked glycoproteins, oligosaccharide is attached to protein through its
- Asparagine residue ✔
- Glutamine residue
- Arginine residue
- Lysine residue
De hovo synthesis of fatty acids occurs in
- Cytosol ✔
- Mitochondria
- Microsomes
- All of these
De hovo synthesis of fatty acids occurs in Acyl Carrier Protein contains the vitamin:
- Biotin
- Lipoic acid
- Pantothenic acid ✔
- Folic acid
Which of the following is required as a reductant in fatty acid synthesis?
- NADH
- NADPH ✔
- FADH2
- FMNH2
Hepatic liponenesis is stimulated by:
- cAMP
- Glucagon
- Epinephrine
- Insulin✔
De novo synthesis of fatty acids requires all of the following except
- Biotin
- NADH✔
- Panthothenic acid
- ATP
Acetyl CoA carboxylase regulates fatty acid synthesis by which of the following mechanism?
- Allosteric regulation
- Covalent modification
- Induction and repression
- All of these ✔
β-Oxidation of fatty acids requires all the following coenzymes except
- CoA
- FAD
- NAD
- NADP ✔
Which of the following can be oxidized by β-oxidation pathway?
- Saturated fatty acids
- Monosaturated fatty acids
- Polyunsaturated fatty acids
- All of these ✔
Propionyl CoA is formed on oxidation of
- Monounsaturated fatty acids
- Polyunsaturated fatty acids
- Fatty acids with odd number of carbon atoms ✔
- None of these
An enzyme required for the synthesis of ketone bodies as well as cholesterol is
- Acetyl CoA carboxylase
- HMG CoA synthetase✔
- HMG CoA reductase
- HMG CoA lyase
Ketone bodies are synthesized in
- Adipose tissue
- Liver ✔
- Muscles
- Brain
All the following statements about ketone bodies are true except
- Their synthesis increases in diabetes mellitus
- They are synthesized in mitchondria
- They can deplete the alkali reserve
- They can be oxidized in the liver ✔
All the following statements about carnitine are true except
- It can be synthesised in the human body
- It can be synthesized from methionine and lysine
- It is required for transport of short chain fatty acids into mitochondria ✔
- Its deficiency can occur due to haemodialysis
Which of the following can be synthesized in the human body if precurors are available?
- Oleic acid
- Palmitoleic acid
- Arachidonic acid
- All of these ✔
All the following can be oxidized by βoxidation except
- Palmitic acid
- Phytanic acid ✔
- Linoleic acid
- Fatty acids having an odd number of carbon atoms
Anti-inflammatory corticosteroids inhibit the synthesis of
- Leukotrienes
- Prostaglandins
- Thromboxanes
- All of these ✔
Diets having a high ratio of polyunsaturated: saturated fatty acids can cause
- Increase in serum triglycerides
- Decrease in serum cholesterol ✔
- Decrease in serum HDL
- Skin lesions
Thromboxanes cause
- Vasodilation
- Bronchoconstriction
- Platelet aggregation✔
- All of these
Prostaglandins lower camp in
- Adipose tissue✔
- Lungs
- Platelets
- Adenohypophysis
Slow reacting Substance of Anaphylaxis is a mixture of
- Prostaglandins
- Prostacyclins
- Thromboxanes
- Leukotrienes ✔
Dipalmitoyl lecithin acts as
- Platelet activating factor
- Second messenger for hormones
- Lung surfactant ✔
- Anti-ketogenic compound
Reichert-Meissl number:
- 0.1 N KOH
- 0.5 KOH
- 0.1 N NaOH ✔
- 0.5 NaOH
In glycerophospholipids, a polyunsaturated fatty acid is commonly attached to which of the following carbon atom of glycerol?
- Carbon 1
- Carbon 2✔
- Both (A) and (B)
- None of these
Lysolecithin is formed from lecithin by removal of
- Fatty acid from position 1
- Fatty acid from position 2 ✔
- Phosphorylcholine
- Choline
Sphingosine is synthesized from
- Palmitoyl CoA and Choline
- Palmitoyl CoA and ethanolamine
- Palmitoyl CoA and serine ✔
- Acetyl CoA and choline
For synthesis of sphingosine, all the following coenzymes are required except
- Pyridoxal phosphate
- NADPH
- FAD
- NAD ✔
Cerebrosides contain all the following except
- Galactose
- Sulphate ✔
- Sphingosine
- Fatty acid
Niemann-Pick disease results from deficiency of
- Ceramidase
- Sphingomyelinase ✔
- Arylsulphatase A
- Hexosaminidase A
Chylomicron remnants are catabolised in
- Intestine
- Adipose tissue
- Liver ✔
- Liver and intestine
VLDL remnant may be converted into
- VLDL
- LDL✔
- HDL
- Chylomicrons
Receptors for chylomicron remnants are
- Apo A specific
- Apo B-48 specific
- Apo C specific
- Apo E specific✔
Nascent HDL of intestinal origin lacks
- Apo A
- Apo C
- Apo E
- Apo C and Apo E ✔

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The questions are typically designed to assess the technical skills and knowledge required for the laboratory profession, including the ability to analyze laboratory test results, perform laboratory procedures, and maintain laboratory equipment.

To prepare for these MCQs, candidates should have a thorough understanding of the key concepts and principles of laboratory science. They should also be familiar with common laboratory equipment and procedures, as well as laboratory safety protocols.

Candidates may also benefit from studying specific laboratory science textbooks or taking online courses that cover the material tested in the MCQs. Additionally, practicing sample MCQs and reviewing the answers can help candidates identify areas where they may need to improve their knowledge or skills.

Overall, the MCQs for lab technologists are designed to be challenging and comprehensive, requiring candidates to demonstrate a high level of proficiency in the field of laboratory science.

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