6951 to 7000 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 6951 to 7000
- A coenzyme present in phosphorylase is
- NAD
- Pyridoxal phosphate ✔
- Thiamin pyrophosphate
- Coenzyme A
- If glucose-1-phosphate formed by glycogenoloysis in muscles is oxidized to CO2 and H2O, the energy yield will be
- 2 ATP equivalents
- 3 ATP equivalents ✔
- 4 ATP equivalents
- 8 ATP equivalents
- A molecule of phosphorylase kinase is made up of
- 4 subunits
- 8 subunits
- 12 subunits
- 16 subunits✔
- Cyclic AMP binds to
- Catalytic subunits of protein kinase
- Regulatory subunits of protein kinase ✔
- Catalytic subunits of phosphorylase kinase
- Regulatory subunits of phosphorylase kinase
- Glucose is the only source of energy for
- Myocardium
- Kidneys
- Erythrocytes ✔
- Thrombocytes
- Glycerol-3-phosphate for the synthesis of triglycerides in adipose tissue is derived from
- Phosphatidic acid
- Diacylglycerol
- Glycerol
- Glucose ✔
- Gluconeogenesis does not occur in
- Brain
- Kidneys
- Muscles ✔
- Liver
- Glucose cannot be synthesized from
- Glycerol
- Lactate
- Alanine
- Leucine ✔
- Coenzyme for phosphoenolpyruvate carboxykinase is
- ATP
- ADP
- GTP ✔
- GDP
- Therapeutic enzymes:
- Streptokinase
- Asparaginase
- Riboflavinase
- Both (Streptokinase ) and (Asparaginase) ✔
- A gluconeogenic enzyme among the following is
- Phosphofructokinase
- Pyruvate kinase
- Phosphoenol pyruvate carboxykinase ✔
- Glucokinase
- Glucose-6-phosphatase and PEP carboxy kinase are regulated by
- Covalent modification
- Allosteric regulation
- Induction and repression ✔
- All of these
- The maximum possible chain length of fatty acids formed in the pathway of denovo synthesis is
- 16 Carbon atoms✔
- 18 Carbon atoms
- 20 Carbon atoms
- 24 Carbon atoms
- Acetyl CoA required for de novo synthesis of fatty acids is obtained from
- Breakdown of existing fatty acids
- Ketone bodies
- Acetate
- Pyruvate ✔
- Formation of acetyl CoA from pyruvate for de novo synthesis of fatty acids requires
- Pyruvate dehydrogenase complex
- Citrate synthetase
- ATP citrate lyase
- All of these ✔
- The major site for elongation of medium chain fatty acids is
- Mitochondria
- Cytosol
- Microsomes ✔
- All of these
- β-oxidation of fatty acids is inhibited by
- NADPH
- Acetyl CoA
- Malonyl CoA ✔
- None of these
- The enzyme regulating extramitochondrial fatty acid synthesis is
- Thioesterase
- Acetyl CoA carboxylase ✔
- Acyl transferase
- Multi-enzyme complex
- Acetyl CoA carboxylase is activated by
- Citrate
- Insulin
- Both (Citrate ) and (Insulin) ✔
- None of these
- All the following statements about acetyl CoA carboxylase are true except:
- It is activated by citrate
- It is inhibited by palmitoyl CoA
- It can undergo covalent modification
- Its dephosphorylated form is inactive✔
- All the following statements about acetyl CoA carboxylase are true except
- It is required for de novo synthesis of fatty acids
- It is required for mitochondrial elongation of fatty acids ✔
- It is required for microsomal elongation of fatty acids
- Insulin converts its inactive form into its active form
- Both Acyl carrier protein (ACP) of fatty acid synthetase and coenzyme (CoA) are
- Contain reactive phosphorylated
- Contain thymidine
- Contain phosphopantetheine reactive groups ✔
- Contain cystine reactive groups
- Which one of the following transfers acyl groups?
- Thiamine pyrophosphate
- Lipomide
- ATP ✔
- NADH
- Which one of the following cofactors must be utilized during the conversion of acetyl CoA to malonyl CoA?
- TPP
- ACP
- NAD+
- Biotin ✔
- Which one of the following enzymes requires a coenzyme derived from the vitamin whose structure is shown below?
- Enoyl CoA hydratase
- Phosphofructokinase
- Glucose-6-phosphatase
- Glucose-6-phosphate dehydrogenase ✔
- Coenzymes derived from the vitamin shown below are required by enzymes involved in the synthesis of which of the following?
- ATP
- UTP
- CTP
- NADH ✔
- All the following are coenzymes except
- Ubiquinone
- CoA
- Pyruvate dehydrogenase ✔
- Lipoic acid
- Which of the following is not a cofactor?
- Mg
- Iron
- Cu
- Methylcobalamine ✔
- All the following compounds are members of the electron transport chain except
- Ubiquinone
- Carnitine✔
- NAD
- FAD
- Thiamine is essential for
- Pyruvate dehydrogenase ✔
- Isocitrate dehydrogenase
- Succinate dehydrogenase
- Acetyl CoA synthetase
- Adenylate cyclase is activated by
- Insulin
- Glucagon ✔
- Prostaglandin E1
- Ca2+ ions
- Maximum enzyme activity is observed at
- Acidic pH
- Neutral pH
- Basic pH
- Optimum pH ✔
- Which of the following is known as bone forming enzyme?
- Alkaline phosphatase ✔
- Acid phosphatase
- Leucine aminopeptidase
- γ-glutamyl transpeptidase
- Conversion of pepsinogen to pepsin is
- Intra molecular rearrangement
- Breaking of hydrogen bonds
- Covalent modification ✔
- Polymerisation
- Which of the following is not having an apoenzyme and coenzyme?
- Lactate dehydrogenase
- Succinate dehydrogenase
- Malate dehydrogenase
- Pepsin ✔
- Pyruvate dehydrogenase is a/an
- Isomerase
- Lyase
- Ligase
- Oxido reductase ✔
- Homogentisic oxidase is an
- Oxidase
- Monooxygenase
- Dioxygenase ✔
- Anaerotic dehydrogenase
- Isocitrate dehydrogenase can use __ as a cofactor.
- NAD+ only
- NADP+ only
- NAD+ or NADP+ ✔
- FMN and FAD
- The rate of most enzyme catalysed reactions changes with pH. As the pH increases, this rate
- reaches a minimum, then increases
- reaches a maximum, then decreases ✔
- increases
- decreases
- A substrate for the enzyme aldolase is
- galactose-6-phosphate
- isocitric acid
- Glucose-1-phosphate
- Fructose 1, 6 diphosphate ✔
- Decarboxylation of α-keto acids requires
- Thiamine pyrophosphate, FAD, NAD+✔
- Flavin mononucleotide
- NADP+
- NAD+ only
- Coenzyme A contains the vitamin:
- Riboflavin
- Pantothenic acid ✔
- Pyridoxine
- Thiamine
- Which of the following is not a component of coenzyme A?
- Adenylic acid
- Pantothenic acid
- β -mercaptoethylamine
- Deoxyadenylic acid ✔
- Malic enzyme convers malic acid, in the presence of NADP+ to Pyruvic acid. This reaction is a/an
- Decarboxylation
- Decarboxylation and Dehydrogenation ✔
- Dehydrogenation
- Oxidation
- The following reaction is characteristic of what type of enzymes? 2H2O2 → 2H2O + O2
- Peroxides
- Catalase ✔
- Dehydrogenase
- Copper containing oxidases
- Of Which warburg’s yellow enzyme contains as a prosthetic group?
- Thiamine pyrophosphate
- Biotin
- NAD+
- Riboflavin-5-phosphate ✔
- Dehydrogenases utilize, as coenzymes, all of the following except
- NAD+
- NADP+
- FAD
- FH4 ✔
- Urea is produced physiologically by the action of the enzyme:
- Urease
- Glutaminase
- Arginase ✔
- None of these
- Urease is a
- Lyase
- Ligase
- Isomerase
- Hydrolase ✔
- Velocity maximum for an enzyme at half the substrate concentration gives
- The molecular weight of the enzyme
- Km value ✔
- Isoelectric pH
- Pk value
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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