4951 to 5000 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 4951 to 5000
- The apolipoprotein which from the integral component of VLDL is
- B-100✔
- B-48
- A
- D
- Serum LDL has been found to be increased in
- Obstructive jaundice✔
- Hepatic jaundice
- Hemolytic jaundice
- Malabsorption syndrome
- A lipoprotein associated with high incidence of coronary atherosclerosis is
- LDL✔
- VLDL
- IDL
- HDL
- The apolipoprotein which acts as ligand for LDL receptor is
- B-48
- B-100✔
- A
- C
- A lipoprotein inversely related to the incidence of coronary artherosclerosis is
- VLDL
- IDL
- LDL
- HDL✔
- The primary biochemical lesion in homozygote with familial hypercholesterolemia (type IIa) is
- Loss of feed back inhibition of HMG reductase
- Loss of apolipoprotein B
- Increased production of LDL from VLDL
- Functional deficiency of plasma membrane receptors for LDL✔
- In abetalipoproteinemia, the biochemical defect is in
- Apo-B synthesis✔
- Lipprotein lipase activity
- Cholesterol ester hydrolase
- LCAT activity
- Familial hypertriaacylglycerolemia is associated with
- Over production of VLDL✔
- Increased LDL concentration
- Increased HDL concentration
- Slow clearance of chylomicrons
- For synthesis of prostaglandins, the essential fatty acids give rise to a fatty acid containing
- 12 carbon atoms
- 16 carbon atoms
- 20 carbon atoms✔
- 24 carbon atoms
- All active prostaglandins have at least one double bond between positions
- 7 and 8
- 10 and 11
- 13 and 14✔
- 16 and 17
- Normal range of plasma total phospholipids is
- 0.2–0.6 mmol/L
- 0.9–2.0 mmol/L
- 1.8–5.8 mmol/L✔
- 2.8–5.3 mmol/L
- HDL2 have the density in the range of
- 1.006–1.019
- 1.019–1.032
- 1.032–1.063
- 1.063–1.125✔
- β-lipoproteins have the density in the range of
- 0.95–1.006
- 1.006–1.019✔
- 1.019–1.063
- 1.063–1.125
- IDL have the density in the range of
- 0.95–1.006
- 1.006–1.019✔
- 1.019–1.032
- 1.032–1.163
- Aspirin inhibits the activity of the enzyme:
- Lipoxygenase
- Cyclooxygenase✔
- Phospholipae A1
- Phospholipase A2
- A ’suicide enzyme’ is
- Cycloxygenase✔
- Lipooxygenase
- Phospholipase A1
- Phospholipase A2
- In ad ipose t issue prostag land ins decrease
- Lipogenesis
- Lipolysis✔
- Gluconeogenesis
- Glycogenolysis
- The optimal pH for the enzyme pepsin is
- 1.0–2.0✔
- 4.0–5.0
- 5.2–6.0
- 5.8–6.
- Pepsinogen is converted to active pepsin by
- HCl✔
- Bile salts
- Ca++
- Enterokinas
- The optimal pH for the enzyme rennin is
- 2.0
- 4.0✔
- 8.0
- 6
- The optimal pH for the enzyme trypsin is
- 1.0–2.0
- 2.0–4.0
- 5.2–6.2✔
- 5.8–6.
- Trypsinogen is converted to active trypsin by
- Enterokinase✔
- Bile salts
- HCl
- Mg+
- Pepsin acts on denatured proteins to produce
- Proteoses and peptones✔
- Polypeptides
- Peptides
- Dipeptide
- Renin converts casein to paracasein in presence of
- Ca++✔
- Mg++
- Na+
- K
- An expopeptidase is
- Trypsin
- Chymotrypsin
- Elastase✔
- Elastas
- The enzyme trypsin is specific for peptide bonds of
- Basic amino acids✔
- Acidic amino acids
- Aromatic amino acids
- Next to small amino acid residue
- Chymotrypsin is specific for peptide bonds containing
- Uncharged amino acid residues✔
- Acidic amino acids
- Basic amino acid
- Small amino acid residue
- The end product of protein digestion in G.I.T. is
- Dipeptide
- Tripeptide
- Polypeptide
- Amino acid✔
- Natural L-isomers of amino acids are absorbed from intestine by
- Passive diffusion
- Simple diffusion
- Faciliated diffusion
- Active process✔
- Abnormalities of blood clotting are
- Haemophilia
- Christmas disease
- Gout
- Both (Haemophilia) and (Christmas disease)✔
- An important reaction for the synthesis of amino acid from carbohydrate intermediates is transamination which requires the cofactor:
- Thiamin
- Riboflavin
- Niacin
- Pyridoxal phosphat✔
- The main sites for oxidative deamination are
- Liver and kidney✔
- Skin and pancreas
- Intestine and mammary gland
- Lung and spleen
- A positive nitrogen balance occurs
- In growing infant✔
- Following surgery
- In advanced cancer
- In kwashiorkar
- The main site of urea synthesis in mammals is
- Liver✔
- Skin
- Intestine
- Kidney
- The enzymes of urea synthesis are found in
- Mitochondria only
- Cytosol only
- Both mitochondria and cytosol✔
- Nucleus
- The number of ATP required for urea synthesis is
- 0
- 1
- 2
- 3✔
- Most of the ammonia released from L-αamino acids reflects the coupled action of transaminase and
- L-glutamate dehydrogenase✔
- L-amino acid oxidase
- Histidase
- Serine dehydratase
- In urea synthesis, the amino acid functioning solely as an enzyme activator:
- N-acetyl glutamate✔
- Ornithine
- Citrulline
- Arginine
- The enzyme carbamoyl phosphate synthetase requires
- Mg++✔
- Ca++
- Na+
- K+
- Control of urea cycle involves the enzyme:
- Carbamoyl phosphate synthetase✔
- Ornithine transcarbamoylase
- Argininosuccinase
- Arginase
- Transfer of the carbamoyl moiety of carbamoyl phosphate to ornithine is catalysed by a liver mitochondrial enzyme:
- Carbamoyl phosphate synthetase
- Ornithine transcarbamoylase✔
- N-acetyl glutamate synthetase
- N-acetyl glutamate hydrolase
- A compound serving a link between citric acid cycle and urea cycle is
- Malate
- Citrate
- Succinate
- Fumarate✔
- The 2 nitrogen atoms in urea are contributed by
- Ammonia and glutamate
- Glutamine and glutamate
- Ammonia and aspartate✔
- Ammonia and alanine
- In carcinoid syndrome the argentaffin tissue of the abdominal cavity overproduce
- Serotonin✔
- Histamine
- Tryptamine
- Tyrosine
- Tryptophan could be considered as precursor of
- Melanotonin✔
- Thyroid hormones
- Melanin
- Epinephrine
- Conversion of tyrosine to dihydroxyphenylalanine is catalysed by tyrosine hydroxylase which requires
- NAD
- FAD
- ATP
- Tetrahydrobiopterin✔
- The rate limiting step in the biosynthesis of catecholamines is
- Decarboxylation of dihydroxyphenylalanine
- Hydroxylation of phenylalanine
- Hydroxylation of tyrosine✔
- Oxidation of dopamine
- The enzyme dopamine β-oxidase which catalyses conversion of dopamine to norepinephrine requires
- Vitamin A
- Vitamin C✔
- Vitamin E
- Vitamin B12
- In humans the sulphur of methionine and cysteine is excreted mainly as
- Ethereal sulphate
- Inorganic sulphate✔
- Sulphites
- Thioorganic compound
- Small amount of urinary oxalates is contributed by the amino acid:
- Glycine✔
- Tyrosine
- Alanine
- Serine
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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