5351 to 5400 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 5351 to 5400
- All the standard amino acids except the following have one chiral ‘c’ atom:
- Threonine, Isoleucine✔
- Isoleucine, Alanine
- Threonine, Alanine
- Alanine, Glutamine
- The role of complement proteins:
- Defense
- Helps immunity of the body✔
- Not predicatable
- None of these
- Optical isomers that are mirror images and non superimposable are called
- Diastereomers
- Enantiomers✔
- dl isomers
- Stereomers
- Living cells have the unique ability to synthesize only the form of optical isomer due to .
- ‘d’ form, stereospecific enzymes
- ‘l’ form stereospecific enzymes
- ‘d’ form, DNA
- ‘L’ form, DNA✔
- Isoelectric pH of an amino acid is that pH at which it has a
- Positive charge
- Negative charge
- No net charge✔
- All of these
- Albuminoids are similar to
- Albumin
- Globulin
- Both Albumin and Globulin✔
- None of these
- Abnormal chain of amino acids in sickle cells anaemia is
- Alpha chain
- Beta chain✔
- Gama chain
- Delta chain
- In prehepatic jaundice, protein flocculation test is
- Normal/weekly positive✔
- Usually positive
- Negative
- None of these
- Side chains of all amino acids contain aromatic rings except
- Pheynl alanine
- Alanine✔
- Tyrosine
- Tryptophan
- In Nitroprusside test, amino acid cystein produces
- Blue colour complex
- Red colour✔
- Yellow colour
- Purple colour
- Bonds that are formed between two cysteine residues is
- Disulfide✔
- Peptide
- Electrostatic
- Hydrophobic
- The acid amide of Aspartic acid is
- Glutamine
- Arginine
- Aspargine✔
- Ornithine
- It is the only amino acid having an ionizing ‘R’ group with a pK’ near 7 and is important in the active site of some enzymes:
- Arginine
- Cystein
- Cystine
- Histidine✔
- A hexa peptide with 5 aspartic acid would have a net charge at pH 7:
- Neutral
- Positive
- Negative✔
- Not predictable
- In the genetic disorder of cystinuria, the patient excretes large quantities of cystine in their urine and its low solubility causes crystalline cystine to precipitate as stones in kidneys. The remedy involves ingesting Na HCO3. Reaction of this treatment is
- NaHCO2 combines with cystine
- NaHCO3 raises the pH above the isoelectric point of cystine✔
- NaHCO3 prevents stone formation by hydrolysis of cystine to cysteine
- None of these
- Amino acids excepting histidine are not good buffering agents in cell because
- They exist as zwitter ions
- Their pk and not in the physiological pH of a cell✔
- Only Histidine has pk of its R group at 6.0 unlike the others which have at a different pH
- None of these
- The amino acids in which the R groups have a net positive charge at pH 7.0 are
- Lysine, Arginine, Histidine✔
- Lysine, Aspargine
- Histidine, Aspargine
- Glutamine, Arginine
- Apolipoproteins are
- AI
- AI1
- C1
- All of these✔
- The amino acid which has a pK near 4 and thus is negatively charged at pH 7 is
- Alanine
- Glutamic acid✔
- Glutamine
- Aspargine
- The side chain of which of the following amino acid contain sulphur atom?
- Methionine✔
- Threonine
- Leucine
- Tryptophan
- Which of the followings gives a positive test for Ninhydrin?
- Reducing sugars
- Triglycerides
- Alpha aminoacids✔
- Esterified Fats
- In glutathione (a tripeptide) is present apart from Glutamic acid and cysteine:
- Serine
- Glycine✔
- Leucine
- Phenyl alanine
- 2-Amino 3-OH propanoic acid is
- Glycine
- Alanine
- Valine
- Serine✔
- All amino acids have one asymmetric carbon atom, except
- Arginine
- Aspargine
- Histidine
- Glycine✔
- Number of amino acids present in the plant, animal and microbial proteins:
- 20✔
- 80
- 150
- 200
- Immunoglobulins are characterized by their
- Heavy chains✔
- Molecular weight
- Light chains
- Electrophoretic behaviour
- The bond in proteins that is not hydrolysed under usual conditions of denaturation:
- Hydrophobic bond
- Hydrogen bond
- Disulphide bond✔
- Peptide bonds
- If the amino group and a carboxylic group of the amino acid are attached to same carbon atom, the amino acid is called
- Alpha✔
- Beta
- Gamma
- Delta
- Zymogen is
- An intracellular enzyme
- Serum enzyme
- A complete extracellular enzyme
- An inactivated enzyme✔
- SGOT level in a adult is
- 5–40 units/dl✔
- 1–4 units/dl
- 5–15 units/dl
- 50–100 units/dl
- Activity of ceruloplasmin shown in vitro:
- Reductase
- Hydrolase
- Ligase
- Oxidase✔
- Increased serum alanine during fasting is due to
- Breakdown of muscle proteins✔
- Decreased utilization of non essential amino acids
- Leakage of aminoacids to plasma
- Impaired renal function
- The following 4 amino acids are required for completion of urea cycle except
- Aspartic acid
- Arginine
- Ornithine
- Glycine✔
- Number of amino acids present in the dietary proteins:
- 22
- 23
- 20✔
- 19
- Urea synthesis takes place in
- Blood
- Liver✔
- Kidney
- Heart
- All followings are ketogenic aminoacids except
- Leucine
- Isoleucine
- Phenyl alanine
- Glycine✔
- The amino acid containing an indole ring:
- Tryptophan✔
- Arginine
- Threonine
- Phenylalanine
- Histidine is converted to histamine through the process of
- Transamination
- Decarboxylation✔
- Oxidative deamination
- Urea cycle
- Physiologically active configuration of amino acids:
- L✔
- D
- For some amino acids it is either of two
- Neither L nor D
- Cystine is synthesized from
- Cysteine✔
- Methionine
- Arginine
- Leucine
- The major constituent of the proteins of hair and keratin of skin:
- Arginine
- Cysteine✔
- Glycine
- Arginine
- NH3 is removed from brain mainly by
- Creatinine formation
- Uric acid production
- Urea formation
- Glutamine formation✔
- Mechanism by which NH3 is removed from the kidneys is
- Urea formation✔
- Uric acid formation
- Creatinine formation
- None of these
- Low density plasma proteins are rich in
- Chylomicrons
- Cholesterol✔
- Triglycerides
- Phospholipids
- Transcortins are
- Mucoproteins
- Glycoproteins✔
- Metalloproteins
- Lipoproteins
- Proteins that carries Iron into different tissues is
- Ceruloplasmin
- Transferrin.✔
- Mucoproteins
- Glycoproteins
- Naturally occurring amino acids have
- L-Configuration✔
- D-Configuration
- DL-Configuration
- None of these
- Abnormal chain of aminoacids in sickle cell anemia is
- β-chain✔
- β-chain
- γ-chain
- r-chain
- A dietary deficiency of tryptophan and nicotinate leads to
- Beri Beri
- Xerophthalmia
- Anemia
- Pellegra✔
- Which one of the following is an essential amino acid?
- Arginine
- Tyrosine
- Phenylalanine✔
- Proline
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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