7351 to 7400 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 7351 to 7400
- Binding of thyroxine to its receptors
- Activates Adenylate cyclase
- Activates guanylate cyclase
- Activates a stimulatory G-protein
- Increases transcription ✔
- The most powerful thyroid hormone is
- Reverse T3
- DIT
- T3✔
- T4
- The most abundant thyroid hormone in blood is
- Free T3
- T3 bound to TBG
- Free T4
- T4 bound to TBG ✔
- Secretion of thyroid hormones is regulated by
- Hypothalamus
- Anterior pituitary
- Feedback regulation
- All of these ✔
- Clinical features of hyperthyroidism include
- Goitre, heat intolerance, weight loss and tachycardia ✔
- Goitre, tremors, tachycardia and cold intolerance
- Exophthalmos, goiter, tachycardia and loss of appetite
- Exophthalmos, goiter, tremors and obesity
- All the following may occur in hyperthyroidism except
- Goitre
- Increased appetite
- Loss of weight
- Low BMR ✔
- All the following may occur in myxoedema except
- Cold intolerance
- Low BMR
- Tachycardia ✔
- Dry and coarse skin
- Mental retardation can occur in
- Cretinism ✔
- Juvenile myxoedema
- Myxoedema
- Juvenile thyrotoxicosis
- Parathyroid hormone (PTH) is synthesised in
- Chief cells of parathyroid glands ✔
- Oxyphil cells of parathyroid glands
- Para follicular cells of thyroid glands
- Follicular cells of thyroid gland
- The number of amino acid residues in PTH:
- 51
- 84 ✔
- 90
- 115
- Amino acid residues which are essential for the biological activity of PTH are
- N-terminal 34 amino acids✔
- N-terminal 50 amino acids
- C-terminal 34 amino acids
- C-terminal 50 amino acids
- Half-life of PTH is
- A few seconds
- A few minutes ✔
- A few hours
- A few days
- The second messenger for PTH is
- Cyclic AMP ✔
- Cyclic GMP
- Diacylglycerol
- Inositol triphosphate
- PTH causes all of the following except
- Increased intestinal absorption of calcium
- Increased intestinal absorption of phosphate ✔
- Increased tubular reabsorption of calcium
- Increased tubular reabsorption of phosphate
- Secretion of PTH is regulated by
- Hypothalamus
- Anterior pituitary
- Feedback effect of plasma PTH
- Feedback effect of plasma calcium ✔
- A high concentration of PTH in blood causes
- Increase in plasma calcium and inorganic phosphorous
- Decrease in plasma calcium and inorganic phosphorous
- Increase in plasma calcium and decrease in plasma inorganic phosphorous ✔
- Decrease in plasma calcium and increase in plasma inorganic phosphorous
- Tetany can occur
- In primary hyperparathyroidism
- In secondary hyperparathyroidism
- In idiopathic hypoparathyroidism
- After accidental removal of parathyroid glands ✔
- Crystallisation of insulin occurs in the presence of
- Chromium
- Copper
- Zinc ✔
- Calcium
- Daily secretion of insulin is about δ–
- 10–20 mg
- 40–50 mg
- 10–20 units
- 40–50 units ✔
- Insulin receptors are decreased in number in
- Obesity ✔
- Starvation
- Hyperinsulinism
- Kwashiorkor
- Insulin binding sites are present on the
- α-subunits of insulin receptor ✔
- β-subunits of insulin receptor
- γ-subunits of insulin receptor
- α-and β−subunits of insulin receptor
- α-Subunits of insulin receptor are present
- Outside the cell membrane ✔
- In the cell membrane
- Across the cell membrane
- In the cytosol
- β-Subunits of insulin receptor are present
- Outside the cell membrane
- In the cell membrane ✔
- Across the cell membrane
- In the cytosol
- Binding of insulin to its receptor activates
- Adenylate cyclase
- Guanylate cyclase
- Phospholipase C
- Tyrosine kinase ✔
- Insulin receptor is made up of
- One α-and one β-subunit
- Two α-and two β-subunit ✔
- Two, α two β-and two γ-subunit
- One α, one β-one γ-and one δ-subunit
- Insulin is required for the active uptake of glucose by most of the cells except
- Muscle cells
- Renal tubular cells
- Adipocytes
- Liver cells ✔
- Insulin decreases
- Glycogenesis
- Glyolysis
- Gluconeogenesis ✔
- Tubular reabsorption of glucose
- Insulin increases
- Glycogenesis ✔
- Gluconeogenesis
- Lipolysis
- Blood glucose
- Insulin increases
- Protein synthesis
- Fatty acid synthesis
- Glycogen synthesis
- All of these ✔
- Insulin decreases the synthesis of
- Hexokinase
- Glucokinase
- PEP carboxykinase ✔
- Glycogen synthetase
- Diabetes mellitus can occur due to all of the following except
- Deficient insulin secretion
- Tumour of β−cells ✔
- Decrease in number of insulin receptors
- Formation of insulin antibodies
- Number of amino acid residues in glucagons is
- 29 ✔
- 34
- 51
- 84
- Glucagon secretion increases
- After a carbohydrate-rich meal
- After a fat-rich meal
- When blood glucose is high
- When blood glucose is low ✔
- The maineffecting of glucagons is to increase
- Glycolysis in muscles
- Glycogenolysis in muscles
- Glycogenolysis in liver ✔
- Glycogenesis in liver
- Tyrosine is required for the synthesis of all of the following except
- Melatonin ✔
- Epinephrine
- Norepinephrine
- Thyroxine
- Dopamine is synthesised from
- Dihydroxyphenylalanine ✔
- Epinephrine
- Norepinephrine
- Metanephrine
- Blood brain barrier can be crossed by
- Epinephrine
- Dopamine
- Dopa ✔
- All of these
- Epinephrine is synthesised in
- Chromaffin cells of adrenal medulla ✔
- Sympathetic ganglia
- Brain
- All of these
- Immediate precursor of epinephrine is
- Metanephrine
- Norepinephrine ✔
- Dopa
- Dopamine
- The chief metabolite of catecholamines is
- Metanephrine
- Normetanephrine
- 3, 4-Dihydroxymandelic acid
- Vanillylmandelic acid ✔
- An enzyme involved in catabolism of catecholamines is
- Dopa decarboxylase
- Aromatic amino acid decarboxylase
- Monoamine oxidase ✔
- Catechol oxidas
- Norepinephrine binds mainly to
- α-Adrenergic receptors ✔
- β-Adrenergic receptrors
- Muscarinic receptors
- Nicotinic receptors
- Astimulatory G-protein transduces the signals from
- α1-and β1-adrenergic receptors
- α2-and β2-adrenergic receptors
- α1-and α2-adrenergic receptors
- β1-and β2-adrenergic receptors ✔
- Binding of catecholamines to α2− adrenergic receptors
- Increases the intracellular concentration of cAMP
- Increases the intracellular concentration of cGMP
- Decreases the intracellular concentration of cAMP ✔
- Decreases the intracellular concentration of cGMP
- Phosphoinositide cascade is activated on binding of catecholamines to
- α1-Adrenergic receptors ✔
- α2-Adrenergic receptors
- β1-Adrenergic receptors
- β2-Adrenergic receptors
- Epinephrine decreases
- Glycogenesis ✔
- Glycogenolysis
- Gluconeogenesis
- Lipolysis
- Epinephrine increases the concentration of free fatty acids in plasma by increasing
- Extramitochondrial fatty acid synthesis
- Mitochondrial fatty acid chain elongation
- Microsomal fatty acid chain elongation
- Lipolysis in adipose tissue ✔
- Epinephrine increases all of the following except
- Glycogenolysis in muscles
- Lipolysis in adipose tissue
- Gluconeogenesis in muscles ✔
- Glucagon secretion
- Secretion of catecholamines is increased in
- Cushing’s syndrome
- Addison’s disease
- Phaeochromocytoma✔
- Simmond’s disease
- Zona glomerulosa of adrenal cortex synthesises
- Glucocorticoids
- Mineralocorticoids ✔
- Androgens
- Estrogen and progesterone
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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