5501 to 5550 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 5501 to 5550
- The PH of albumin is
- 3.6
- 4.7✔
- 5.0
- 6.1
- Ninhydrin reaction gives a purple colour and evolves CO2 with
- Peptide bonds
- Histamine
- Ergothioneine
- Aspargine✔
- Denaturation of proteins involves breakdown of
- Secondary structure
- Tertiary structure
- Quarternary structure
- All of these✔
- In denaturation of proteins, the bond which is not broken:
- Disulphide bond
- Peptide bond✔
- Hydrogen bond
- Ionic bond
- The purity of an isolated protein can be tested by employing various methods.
- Solubility curve
- Molecular weight
- Ultra Centrifugation
- Immuno Ractivity
- All of these✔
- More than one break in the line or in saturation curve indicates the following quality of protein.
- Non homogenity✔
- Purity
- Homogeneity
- None of these
- A sharp moving boundary is obtained between the pure solvent and solute containing layer in
- Chromatography
- Immuno Reactivity
- Ultra Centrifugation✔
- Solubility curve
- The antibodies raised against a pure protein will show only one sharp spike on this technique:
- Solubility curve
- Solvent precipitation
- Molecular weight determination
- Immuno electrophoresis✔
- This technique takes the advantage of the fact that each protein has different pH at which it is electrically neutral i.e., its isoelectric pH:
- Isoelectric focussing✔
- Immunoel Ectro Phoresis
- Chromatography
- HPLC
- The following technique makes use of the difference in net charges of proteins at a given pH:
- Thin layer chromatography
- Ion exchange chromatography✔
- High performance liquid chromatography
- Paper chromatography
- The ratio of the distance moved by a compound to the distance moved by the solvent frent is known as its
- PI value
- Linking number
- Rf value✔
- Gold number
- The movement of charged particles towards one of the electrodes under the influence of electrical current is
- Gel filtration
- Molecular sieving
- Gas liquid chromatography
- Electrophoresis✔
- An anion exchange resin linked to cellulose backbone is
- DEAE cellulose✔
- CM cellulose
- Sephadex
- None of these
- A cation exchange resin linked to cellulose backbone is
- CM-cellulose✔
- DEAE cellulose
- Starch
- Biogel
- The sorting out of molecules according to size and shape may be adapted to protein purification in this technique:
- Adsorption chromatography
- Gel filtration chromatography✔
- Paper chromatography
- None of these
- Frequently employed materials for the adsorption chromatography of proteins include
- High capacity supporting gel
- Starch blocks
- Calcium phosphate gel alumina gel and hydroxy apatite✔
- All of these
- The solubility of most proteins is lowered at high salt concentrations is called as
- Salting in process
- Salting out process✔
- Isoelectric focussing
- None of these
- Phenylalanine, ornithine and methionine are involved in the biogenesis of
- Lysergic acid✔
- Reserpine
- L-Hyoscyamine
- Papaverine
- All the following diuretics inhibit the carbonic anhydrase except
- Acetazolamide
- Bumetanide✔
- Furosemide
- Ethacrynic acid
- Protein is a polymer of
- Sugars
- Phenols
- Amino acids✔
- Carboxylic acids
- All the following amino acids are optically active except
- Tryptophane
- Phenylalanine
- Valine
- Glycine✔
- Proteinous substances which catalyze biochemical reactions are known as
- Activators
- Catalysts
- Enzymes✔
- Hormones
- Insulin is a protein which controls
- Blood clotting
- Metabolic pathway✔
- Digestion
- Kreb’s cycle
- Proteins which are responsible for defence mechanism are called
- Antimetabolites
- Antibodies✔
- Antimycins
- Apoproteins
- When the net charge on an amino acid is zero, the pH is maintained as?
- 4.5
- 11.2
- 7.0✔
- 9.1
- Isoelectric point of amino acids is used for
- Crystallisation
- Precipitation✔
- Solubility
- Reactivity
- Xanthoproteic test is positive in proteins containing
- Sulphur amino acids
- α-Amino acids
- Aromatic amino acids✔
- Aliphatic amino acids
- All α-amino acids give positive
- Million’s test
- Biurete test
- Xanthproteic test
- Ninhydrine test✔
- N-terminal amino acids of a polypeptide are estimated by
- Edmann reaction✔
- Sanger’s reagent
- Formaldehyde test
- Ninhydrine reaction
- Million’s test is positive for
- Phenylalanine
- Glycine
- Tyrosine✔
- Proline
- Indole group of tryptophan responses positively to
- Glyoxylic acid✔
- Schiff’s reagent
- Biuret test
- Resorcinol test
- Guanidine group of argentine gives positive test with
- Lead acetate
- Sakaguchi reagent✔
- Tricholoroacetic acid
- Molisch’s reagent
- Thiol group of cysteine gives red colour with
- Sodium acetate
- Lead acetate
- Sodium nitroprusside✔
- Barfoed’s reagent
- Protein deficiency disease is known as
- Cushing’s disease
- Fabry’s disease
- Parkinson’s disease
- Kwashiorkor and marasmus✔
- A vegetable source of protein is
- Egg plant
- Soyabean✔
- Tree of the Heaven
- Devil’s dung
- Oxaloacetate is converted to aspartic acid by
- Reductase
- Oxidase
- Transminase✔
- Catalase
- Deficiency of biotin results in decrease in
- Amino acid synthesis
- Lipid synthesis
- Kidney
- Fatty acid synthesis✔
- The precursor of bile salts, sex hormones and vitamin D is
- Diosgenin
- Cholesterol✔
- Campesterol
- Ergosterol
- Unsaturated fatty acids is known as
- Non-essential fatty acids
- Essential fatty acidsl✔
- Cerebrosides
- Phospholipids
- Biuret test is specific for
- Two peptide linkage✔
- Phenolic group
- Imidazole ring
- None of these
- Most of calcium is present in bone, but 2% present in soft tissue and the blood is called
- Calcinated blood
- Solidified blood
- Physiological blood✔
- Colloidal blood
- Calcium present with protein is known as free while in salt form is called as
- Bound✔
- Precipitated
- Solid
- Polymorphs
- The following ions help in enzymatic transfer of phosphate from ATP to pyruvic acid:
- Sodium
- Calcium
- Magnesium✔
- Potassium
- International enzyme commission classifies enzymes into
- Three classes
- Six classes✔
- Four classess
- Ten classes
- Michaelis – Menten equation is used to explain the effect of substrate concentration on
- Carbohydrate
- Enzyme✔
- Lipid
- Protein
- The pH at which an enzyme has maximum activity is known as
- Isoelectric pH
- Optimum pH✔
- Low pH
- High pH
- Degradation of proteins to amino acids, glucose from carbohydrates and fatty acids from lipids is known as
- Anabolism
- Metabolism
- Catabolism✔
- Cretinism
- During glycolysis of glucose the energy liberated in the absence of oxygen is known as
- Oxygenesis
- Glyconeogenesis
- Glycogenolysis
- Anaerobic fermentation✔
- Deficiency of urea cycle enzymes results into accumulation of citrulline argininosuccinate arginine in the liver resulting in increasing concentration of …….. in the blood.
- Calcium
- Sodium
- Ammonia✔
- Lipid
- Accumulation of trytophan in blood is known as
- Pompe’s disease
- Wilson’s disease
- Wolman’s disease
- Hartnup’s disease✔
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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