7401 to 7450 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 7401 to 7450
- Cortisol is a
- Glucocorticoid
- Mineralocorticoid ✔
- Androgen
- Estrogen
- The major mineralcorticoid is
- Hydrocortisone
- Aldosterone ✔
- Aldactone A
- Androstenedione
- Steroid hormones are synthesised in all of the following except
- Testes
- Ovaries
- Adrenal medulla ✔
- Adrenal cortex
- Steroid hormones are synthesised from
- Cholesterol ✔
- 7-Dehydrocholesterol
- Calcitriol
- 7-Hydroxycholesterol
- A common intermediate in the synthesis of all the steroid hormones is
- Pregnenolone ✔
- 17-Hydroxypregnenolone
- Corticosterone
- Progesterone
- A common intermediate in the synthesis of cortisol and aldosterone is
- Progesterone ✔
- Testosterone
- Estradiol
- None of these
- A common intermediate in the synthesis of estrogens is
- Cortisol
- Andostenedione ✔
- Corticosterone
- 11-Deoxycorticosterone
- Glucocorticoids are transported in blood
- In association with transcortin chiefly
- In association with albumin to some extent
- In free form partly
- All of these ✔
- All the following statements about transcortin are true except
- It is synthesised in liver
- It transports glucocorticoids
- It transports aldosterone ✔
- It transports progesterone
- The second messenger for glucocorticoids is
- Cyclic AMP
- Cyclic GMP
- Inositol triphosphate
- No second messenger is required ✔
- Glucocorticoids increase all of the following except
- Gluconeogenesis
- Lipolysis in extremities
- Synthesis of elcosanoida ✔
- Hepatic glycogenesis
- Glucocorticoids increase the synthesis of all of the following except
- Glucokinase ✔
- Glucose-6-phosphatase
- Fructose-1, 6-biphosphatase
- Pyruvate carboxylase
- Secretion of glucocorticoida is regulated by all the following except
- Hypothalamus
- Anterior pituitary
- Feedback control by blood glucose ✔
- Feedback control by glucocorticoids
- Mineralcorticoids regulate the metabolism of all of the following except
- Sodium
- Potassium
- Calcium ✔
- Chloride
- Mineralocorticoids increase the tubular reabsorption of
- Sodium and calcium
- Sodium and potassium
- Sodium and chloride ✔
- Potassium and chloride
- Mineralocorticoids increase the tubular secretion of
- Sodium
- Potassium ✔
- Chloride
- Bicarbonate
- Secretion of mineralcorticoids is increased by
- ACTH
- Angiotensin ✔
- Hypokalaemia
- Hypernatraemia
- In Addison’s disease, there is excessive retention of
- Potassium ✔
- Sodium
- Chloride
- Water
- In adrenogenital syndrome due to total absence of 21-hydroxylase in adrenal cortex, there is
- Deficient secretion of glucocorticoids
- Deficient secretion of mineralcorticoids
- Excessive secretion of androgens
- All of these ✔
- Spironolactone is an antagonist of
- Cortisol
- Hydrocortisone
- Aldosterone ✔
- Testosteron
- Androgens are synthesised in
- Leydig cells in testes ✔
- Sertoli cells in testes
- Seminiferous tubules
- Prostate gland
- Testosterone is transported in blood by
- Transcortin
- Testosterone binding globulin ✔
- Testosterone estrogen binding globulin
- Albumin
- The metabolites of androgens are
- 17-Hydroxysteroids
- 17-Ketosteroids ✔
- 11-Hydroxysteroids
- 11-Ketosteroids
- An androgen which is more powerful than testosterone is
- Androstenedione
- Dihydrotestosterone ✔
- Androsterone
- Epiandrosterone
- Secretion of androgens is increased by
- LH ✔
- FSH
- ACTH
- Growth hormone
- During late pregnancy, the major source of progesterone is
- Adrenal cortex
- Placenta ✔
- Corpus luteum
- Graafian follicles
- Progesterone is transported in blood by
- Transcortin
- Sex hormone binding globulin ✔
- Albumin
- Testosterone estrogen binding globulin
- The major metabolite of progesterone is
- Pregnenolone
- Pregnanediol ✔
- Estradiol
- Norethindrone
- Secretion of progesterone
- Is more in first half of menstrual cycle than in second half
- Is more in second half of menstrual cycle than in first half ✔
- Remains constant during menstrual cycle
- Decreases during pregnancy
- Women become susceptible to osteoporosis after menopause due to decreased
- Secretion of Parathormone
- Conversion of vitamin D into calcitriol
- Secretion of estrogen ✔
- Secretion of progesterone
- A hormone used for detection of pregnancy is
- Estrogen
- Progesterone
- Oxytocin
- Chorionic gonadotropin ✔
- Placenta secretes all of the following except
- FSH ✔
- Progesterone
- Estrogen
- Chorionic gonadotropin
- Gastrin is a polypeptide made up of
- Five amino acids
- Twelve amino acids
- Seventeen amino acids✔
- Twenty amino acids
- Biological activity of gastrin is present in the
- Four N-terminal amino acids
- Four C-terminal amino acids ✔
- Five N-terminal amino acids
- Five C-terminal amino acids
- All the following statements about βendorphin are true except µ :
- It is a polypeptide
- Its precursor is pro-opio-melanocortin
- Its receptors are represent in brain
- Its action is blocked by morphine✔
- All the following statements about epidermal growth factor are true except
- It is a protein
- It possess quaternary structure
- Its receptor is made up of a single polypeptide chain ✔
- Its receptor possesses tyrosine kinase domain
- Met-enkephalin is a
- Tripeptide
- Pentapeptide ✔
- Octapeptide
- Decapeptide
- Vasoconstrictor effect of ADH is mediated by
- cAMP
- cGMP
- Protein kinase C ✔
- Angiotensin II
- The rate limiting step in catecholamine synthesis is catalysed by
- Phenylalanine hydroxylase
- Tyrosine hydroxylase ✔
- Dopa decarboxylase
- Phenylethanolamine N-methyl transferase
- Dopa decarboxylase is inhibited by
- Epinephrine
- Norepinephrine
- α−Methyldopa ✔
- None of these
- Tyrosine hydroxylase is inhibited by
- Catecholamines✔
- α−Methyldopa
- Phenylalanine
- Vanillyl mandelic acid
- Urinary excretion of vanillyl madelic acid is increased in
- Phaeochromocytoma ✔
- Cushing’s syndrome
- Carcinoid syndrome
- Aldosteronism
- Iodide uptake by thyroid gland is decreased by
- Thicyanate ✔
- Thiouracil
- Thiourea
- Methimazole
- Binding of growth hormone to its receptor results in phosphorylation of
- JAK-2
- Growth hormone receptor
- STATs
- All of these✔
- Binding of growth hormone to its receptor results in increased transcription of
- c-fos gene
- c-myc gene ✔
- p-53 gene
- None of these
- Activation of IRS-1, PI-3 kinase and GRB2 is brought about by
- Glucagon
- Insulin ✔
- Prolactin
- IGF-2
- The protein IRS-1 is phosphorylated by
- Protein kinase A
- Protein kinase C
- Tyrosine kinase activity of insulin receptor ✔
- Tyrosine kinase activity of IGF-1 receptor
- Phosphorylated IRS-1 activates GRB-2 which is
- G-protein receptor binding protein-2
- Growth factor receptor binding protein-2✔
- Growth hormone receptor binding protein-2
- Glucocorticoid receptor binding protein-2
- STAT proteins are
- Thermostat proteins of brain
- Glucostat proteins of hepatocyte cell membrane
- Short term activators of translation
- Signal transduction and activators of transcription ✔
- Activated phospholipase C acts on
- Phosphatidyl inositol-4, 5-biphosphate ✔
- Inositol-1, 4, 5-triphosphate
- Protein kinase C
- Pl-3 kinase
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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