What is the mechanism of inhibitory action of Di-isopropyl fluoro phosphate?

What is the mechanism of inhibitory action of Di-isopropyl fluoro phosphate?
by

1 Answer

Answer :

It inhibits enzymes with serine in their active centres, e.g. acetylcholine esterase.
by

Related questions

The most probable mechanism of anticonvulsant action of phenytoin is: A. Facilitation of GABAergic inhibitory transmission B. Hyperpolarization of neurones C. Interaction with Ca2+ channels to promote Ca2+ influx D. Prolongation of voltage sensitive neuronal Na+ channel inactivation

Description : The most probable mechanism of anticonvulsant action of phenytoin is: A. Facilitation of GABAergic inhibitory transmission B. Hyperpolarization of neurones C. Interaction with Ca2+ channels to promote Ca2+ influx D. Prolongation of voltage sensitive neuronal Na+ channel inactivation

Last Answer : D. Prolongation of voltage sensitive neuronal Na+ channel inactivation

In EM pathway -2-phosphoglycerate is converted to (A) Phospho enol pyruvate (B) Enol pyruvate (C) Di hydroxy acetone phosphate (DHAP) (D) 1,3 bisphosphoglycerate

Description : In EM pathway -2-phosphoglycerate is converted to (A) Phospho enol pyruvate (B) Enol pyruvate (C) Di hydroxy acetone phosphate (DHAP) (D) 1,3 bisphosphoglycerate

Last Answer : A

Which compound reacts most rapidly by an SN1 mechanism? (a) Methyl chloride(b) Isopropyl chloride(c) Ethyl chloride(d) tert-Butyl chloride

Description : Which compound reacts most rapidly by an SN1 mechanism? (a) Methyl chloride (b) Isopropyl chloride (c) Ethyl chloride (d) tert-Butyl chloride

Last Answer : tert-Butyl chloride

Rock phosphate constitutes mainly of (A) Fluorapatite (B) Di-calcium phosphate (C) Mono-calcium phosphate (D) Di-ammonium phosphate

Description : Rock phosphate constitutes mainly of (A) Fluorapatite (B) Di-calcium phosphate (C) Mono-calcium phosphate (D) Di-ammonium phosphate

Last Answer : (A) Fluorapatite

The main constituent of rock phosphate is (A) Mono-calcium phosphate (B) Di-calcium phosphate (C) Fluorspar (D) None of these

Description : The main constituent of rock phosphate is (A) Mono-calcium phosphate (B) Di-calcium phosphate (C) Fluorspar (D) None of these

Last Answer : (B) Di-calcium phosphate

Explain the manufacturing of Di-ammonium phosphate with a process flow diagram.

Description : Explain the manufacturing of Di-ammonium phosphate with a process flow diagram. 

Last Answer : Di Ammonium Phosphate  Anhydrous and dry ammonia and phosphoric acid are charged into the first reactor. About 80% neutralization is done in the first reactor. Further ammonia is added to second reactor. So conversion to ... .  Reaction NH3 + H3PO4 → NH4H2PO4 NH3 + NH4H2PO → (NH4)2HPO4

Explain the manufacturing process of Di-Ammonium Phosphate.

Description : Explain the manufacturing process of Di-Ammonium Phosphate. 

Last Answer : Di Ammonium Phosphate  Anhydrous and dry ammonia and phosphoric acid are charged into the first reactor. About 80% neutralization is done in the first reactor. Further ammonia is added to second reactor. So ... obtained.  Reaction NH3 + H3PO4 NH4H2PO4 NH3 + NH4H2PO (NH4)2HPO4

Of the following neurotransmitters, which demonstrates inhibitory action, helps control mood and sleep, and inhibits pain pathways? a) Serotonin The sources of serotonin are the brain stem, hypothalamus, and dorsal horn of the spinal cord.

Description : Of the following neurotransmitters, which demonstrates inhibitory action, helps control mood and sleep, and inhibits pain pathways? a) Serotonin The sources of serotonin are the brain ... d) Acetylcholine Acetylcholine is usually excitatory, but the parasympathetic effects are sometimes inhibitory.

Last Answer : a) Serotonin The sources of serotonin are the brain stem, hypothalamus, and dorsal horn of the spinal cord.

The therapeutic effect of sulfasalazine in ulcerative colitis is exerted by: A. Inhibitory action of the unabsorbed drug on the abnormal colonic flora B. Breakdown of the drug in colon to release 5-aminosalicylic acid which suppresses inflammation locally C. Release of sulfapyridine having antibacterial property D. Systemic immunomodulatory action of the drug

Description : The therapeutic effect of sulfasalazine in ulcerative colitis is exerted by: A. Inhibitory action of the unabsorbed drug on the abnormal colonic flora B. Breakdown of the drug in ... locally C. Release of sulfapyridine having antibacterial property D. Systemic immunomodulatory action of the drug

Last Answer : B. Breakdown of the drug in colon to release 5-aminosalicylic acid which suppresses inflammation locally

Select the diuretic which is orally active, efficacious in acidosis as well as alkalosis, causes diuresis even in renal failure and has additional carbonic anhydrase inhibitory action: A. Mannitol B. Benzthiazide C. Indapamide D. Furosemide

Description : Select the diuretic which is orally active, efficacious in acidosis as well as alkalosis, causes diuresis even in renal failure and has additional carbonic anhydrase inhibitory action: A. Mannitol B. Benzthiazide C. Indapamide D. Furosemide

Last Answer : D. Furosemide

Phenytoin appears to derive its anticonvulsant action from: A. Selective inhibition of high frequency neuronal discharges B. Selective inhibition of epileptic focus C. Selective inhibition T-type Ca2+ current in brain cells D. Selective enhancement of inhibitory transmission in the brain

Description : Phenytoin appears to derive its anticonvulsant action from: A. Selective inhibition of high frequency neuronal discharges B. Selective inhibition of epileptic focus C. Selective inhibition T-type Ca2+ current in brain cells D. Selective enhancement of inhibitory transmission in the brain

Last Answer : A. Selective inhibition of high frequency neuronal discharges

Edman’s reagent contains (A) Phenylisothiocyanate (B) 1-Fluoro-2, 4-dinitrobenzene (C) Dansyl Chloride (D) tBOC azide

Description : Edman’s reagent contains (A) Phenylisothiocyanate (B) 1-Fluoro-2, 4-dinitrobenzene (C) Dansyl Chloride (D) tBOC azide

Last Answer : Answer : A

Sanger’s reagent contains (A) Phenylisothiocyanate (B) Dansyl chloride (C) 1-Fluoro-2, 4-dinitrobenzene (D) Ninhydrin

Description : Sanger’s reagent contains (A) Phenylisothiocyanate (B) Dansyl chloride (C) 1-Fluoro-2, 4-dinitrobenzene (D) Ninhydrin

Last Answer : Answer : C

Signal transducer for glucagons is a (A) Cyclic nucleotide (B) Phosphoinositide (C) Stimulatory G-protein (D) Inhibitory G-protein

Description : Signal transducer for glucagons is a (A) Cyclic nucleotide (B) Phosphoinositide (C) Stimulatory G-protein (D) Inhibitory G-protein

Last Answer : Answer : C

Bleaching action of moist sulphur di-oxide is because of its (1) basic property (2) acidic property (3) oxidising property (4) reducing property

Description : Bleaching action of moist sulphur di-oxide is because of its (1) basic property (2) acidic property (3) oxidising property (4) reducing property

Last Answer : oxidising property

An example of feedback inhibition is (A) Allosteric inhibition of hexokinase by glucose6-phosphate (B) Cyanide action on cytochrome (C) Sulpha drug on folic acid synthesizer bacteria (D) Reaction between succinic dehydrogenase and succinic acid

Description : An example of feedback inhibition is (A) Allosteric inhibition of hexokinase by glucose6-phosphate (B) Cyanide action on cytochrome (C) Sulpha drug on folic acid synthesizer bacteria (D) Reaction between succinic dehydrogenase and succinic acid

Last Answer : Answer : A

The principal action of insulin in adipose tissue is to inhibit the activity of the (A) Hormone sensitive lipoprotein lipase (B) Glycerol phosphate acyltransferase (C) Acetyl-CoA carboxylase (D) Pyruvate dehydrogenase

Description : The principal action of insulin in adipose tissue is to inhibit the activity of the (A) Hormone sensitive lipoprotein lipase (B) Glycerol phosphate acyltransferase (C) Acetyl-CoA carboxylase (D) Pyruvate dehydrogenase

Last Answer : Answer : A

The vitamin required as coenzyme for the action of transaminases is (A) Niacin (B) Pantothenic acid (C) Pyridoxal phosphate (D) Riboflavin

Description : The vitamin required as coenzyme for the action of transaminases is (A) Niacin (B) Pantothenic acid (C) Pyridoxal phosphate (D) Riboflavin

Last Answer : Answer : C

In glycolysis, ATP is created by A.photophosphorylation B.the chemiosmotic mechanism C.substrate level phosphorylation D.the pentose phosphate pathway

Description : In glycolysis, ATP is created by A.photophosphorylation B.the chemiosmotic mechanism C.substrate level phosphorylation D.the pentose phosphate pathway

Last Answer : C.substrate level phosphorylation

What is the mechanism of action of prostaglandins?

Description : What is the mechanism of action of prostaglandins?

Last Answer : Prostaglandins are local hormones, and function through G-protein coupled receptors In most tissues, PGE increases cAMP level. But in adipose tissue and in renal tubular cells, PGE lowers cAMP level.

What is the mechanism of action of aspirin?

Description : What is the mechanism of action of aspirin?

Last Answer : Aspirin acetylates serine in the active site and irreversibly inhibits the cyclo-oxygenase.

What is the mechanism of action of insulin?

Description : What is the mechanism of action of insulin?

Last Answer : Insulin acts by binding to membrane receptor, on the target cells.

What is the mechanism of action of adrenaline?

Description : What is the mechanism of action of adrenaline?

Last Answer : Adrenaline increases cyclic AMP level which activates glycogen phosphorylase.

The depletion of ozone layer is due to - (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane

Description : The depletion of ozone layer is due to - (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane

Last Answer : (1) chloro fluoro carbon Explanation: A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ... R-4104 by the Montreal Protocol because they contribute to ozone depletion in the upper atmosphere.

Which one amongst the following is not a Green House gas? (1) Nitrogen (2) Carbon dioxide (3) Carbon Monoxide (4) Chloro fluoro carbons

Description : Which one amongst the following is not a Green House gas? (1) Nitrogen (2) Carbon dioxide (3) Carbon Monoxide (4) Chloro fluoro carbons

Last Answer : (1) Nitrogen Explanation: A greenhouse has (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

Poly-tetra-fluoro ethylene (PTFE) is known as (A) Dacron (B) Teflon (C) Bakelite

Description : Poly-tetra-fluoro ethylene (PTFE) is known as (A) Dacron (B) Teflon (C) Bakelite

Last Answer : (B) Teflon

Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called (A) Polyurethane (B) Silicone rubber (C) Teflon (D) Epoxy resin

Description : Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called (A) Polyurethane (B) Silicone rubber (C) Teflon (D) Epoxy resin

Last Answer : (C) Teflon

Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of (A) CO2 (B) SO2 (C) Hydrocarbons (D) CFC (chloro fluoro carbon)

Description : Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of (A) CO2 (B) SO2 (C) Hydrocarbons (D) CFC (chloro fluoro carbon)

Last Answer : (D) CFC (chloro fluoro carbon)

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate? (A) CO (B) SO2 (C) NOx (D) CFC (chloro fluoro carbons)

Description : Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion ... rate? (A) CO (B) SO2 (C) NOx (D) CFC (chloro fluoro carbons)

Last Answer : (A) CO

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone. (A) 10 2 (B) 10 5 (C) 10 9 (D) 10 15

Description : CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone. (A) 10 2 (B) 10 5 (C) 10 9 (D) 10 15

Last Answer : (B) 10 5

Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called (A) Polyurethane (B) Silicone (C) Teflon (D) Epoxy resin

Description : Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called (A) Polyurethane (B) Silicone (C) Teflon (D) Epoxy resin

Last Answer : (C) Teflon

P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as (A) Bakelite (B) Neoprene (C) Teflon (D) Nylon-66

Description : P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as (A) Bakelite (B) Neoprene (C) Teflon (D) Nylon-66

Last Answer : (C) Teflon

Teflon is (A) Phenol formaldehyde (B) An inorganic polymer (C) Poly tetra-fluoro-ethylene (P.T.F.E.) (D) A monomer

Description : Teflon is (A) Phenol formaldehyde (B) An inorganic polymer (C) Poly tetra-fluoro-ethylene (P.T.F.E.) (D) A monomer

Last Answer : (C) Poly tetra-fluoro-ethylene (P.T.F.E.)

In which country, the recent international agreement on phasing out Hydro Fluoro Carbons (HFCs) was signed? (A) Rwanda (B) Morocco (C) South Africa (D) Algeria

Description : In which country, the recent international agreement on phasing out Hydro Fluoro Carbons (HFCs) was signed? (A) Rwanda (B) Morocco (C) South Africa (D) Algeria 

Last Answer : (A) Rwanda

Which one amongst the following is not a Green House gas? (1) Nitrogen (2) Carbon dioxide (3) Carbon Monoxide (4) Chloro fluoro carbons

Description : Which one amongst the following is not a Green House gas? (1) Nitrogen (2) Carbon dioxide (3) Carbon Monoxide (4) Chloro fluoro carbons

Last Answer : Nitrogen

The depletion of ozone layer is due to (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane

Description : The depletion of ozone layer is due to (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane

Last Answer : chloro fluoro carbon

The active transport of ‘Ca’ is regulated by __________ which is synthesized in kidnyes. (A) Cholecalciferol (B) Ergosterol (C) 25-OH cholecalciferol (D) 1, 25-di OH-Cholecalciferol

Description : The active transport of ‘Ca’ is regulated by __________ which is synthesized in kidnyes. (A) Cholecalciferol (B) Ergosterol (C) 25-OH cholecalciferol (D) 1, 25-di OH-Cholecalciferol

Last Answer : Answer : D

Microsomal hydroxylase system contains a (A) Di-oxygenase (B) Mono-oxygenase (C) Both (A) and (B) (D) None of thse

Description : Microsomal hydroxylase system contains a (A) Di-oxygenase (B) Mono-oxygenase (C) Both (A) and (B) (D) None of thse

Last Answer : Answer : B

Which plant hormones have inhibitory effects? -Biology

Description : Which plant hormones have inhibitory effects? -Biology

Last Answer : answer:

Which plant hormones have inhibitory effects? -Biology

Description : Which plant hormones have inhibitory effects? -Biology

Last Answer : answer:

What is the function of a inhibitory synapse?

Description : What is the function of a inhibitory synapse?

Last Answer : What is the answer ?

The following statement(s) is/are true concerning initial microbiologic diagnostic techniques. a. Appropriate expeditious transport of specimens to the microbiology laboratory is essential for obtaining accurate clinical information b. The use of potassium hydroxide in preparing a specimen slide for light microscopy will be useful in identification of anaerobic bacteria c. Antibiotic sensitivity is determined by exposing the specific microorganism to varying amounts of antibiotic with the concentration of the antibiotic inhibiting growth referred to as the MIC (minimal inhibitory concentration) d. Serum levels of antimicrobial agents should achieve in excess of a 4-to 8-fold increase over the MIC to be considered clinically efficacious.

Description : The following statement(s) is/are true concerning initial microbiologic diagnostic techniques. a. Appropriate expeditious transport of specimens to the microbiology laboratory is essential for obtaining accurate ... a 4-to 8-fold increase over the MIC to be considered clinically efficacious.

Last Answer : Answer: a, c, d Because most surgical infections are polymicrobial, specimens should be cultured for aerobic and anaerobic bacteria, as well as fungi. Although aerobic and aerotolerant ... fold increase over MIC during the peak serum level have been demonstrated to be clinically efficacious

Which of the following statements regarding fibroblasts and their function in wound healing are true? a. IL-1 has both inhibitory and promotional effects on fibroblast growth b. TNFa stimulates fibroblast collagen synthesis c. IL-1 and TNFa have opposite effects on the healing of bone d. In human clinical trials, EGF (epithelial growth factor) has been demonstrated to accelerate epidermal regeneration in cutaneous wounds

Description : Which of the following statements regarding fibroblasts and their function in wound healing are true? a. IL-1 has both inhibitory and promotional effects on fibroblast growth b. TNFa ... EGF (epithelial growth factor) has been demonstrated to accelerate epidermal regeneration in cutaneous wounds

Last Answer : Answer: a, d IL-1 appears to be important in the process of normal wound repair. IL-1 has been shown to stimulate skin fibroblast and keratinocyte growth, as well as ... that recombinant EGF enhances keratinocyte migration. EGF is also a potent chemoattractant for granulation tissue fibroblasts

The following are true about the synaptic potential: a. the Na+ and K+ currents occurs simultaneously b. is a graded potential c. the channel is ligand-gated d. the post-synaptic potential is inhibitory when depolarizing

Description : The following are true about the synaptic potential: a. the Na+ and K+ currents occurs simultaneously b. is a graded potential c. the channel is ligand-gated d. the post-synaptic potential is inhibitory when depolarizing

Last Answer : the Na+ and K+ currents occurs simultaneously

Inhibitory transmitters may be a. glycine b. GABA c. both d. none of them

Description : Inhibitory transmitters may be a. glycine b. GABA c. both d. none of them

Last Answer : both

Fruit colour in squash is an example of (a) recessive epistasis (b) dominant epistasis (c) complementary genes (d) inhibitory genes.

Description : Fruit colour in squash is an example of (a) recessive epistasis (b) dominant epistasis (c) complementary genes (d) inhibitory genes.

Last Answer : (a) recessive epistasis

Which of the following statements is correct in relation to the endocrine system? (a) Non-nutrient chemicals produced by the body in trace amounts that act as intercellular messenger are known as hormones. (b) Releasing and inhibitory hormones are produced by the pituitary gland. (c) Adenohypophysis is under direct neural regulation of the hypothalamus. (d) Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones.

Description : Which of the following statements is correct in relation to the endocrine system? (a) Non-nutrient chemicals produced by the body in trace amounts that act as intercellular messenger are known as ... in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones.

Last Answer : (a) Non-nutrient chemicals produced by the body in trace amounts that act as intercellular messenger are known as hormones.

Which of the following is not an inhibitory substance governing seed dormancy? (a) Gibberellic acid (b) Abscisic acid (c) Phenolic acid (d) Para-ascorbic acid

Description : Which of the following is not an inhibitory substance governing seed dormancy? (a) Gibberellic acid (b) Abscisic acid (c) Phenolic acid (d) Para-ascorbic acid

Last Answer : a) Gibberellic acid

Poisons like cyanide inhibit Na+ efflux and K+ influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that (a) ATP is the carrier protein in the transport system (b) energy for Na+-K+ exchange pump comes from ATP (c) ATP is hydrolysed by ATPase to release energy (d) Na+-K+ exchange pump operates in the cell.

Description : Poisons like cyanide inhibit Na+ efflux and K+ influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that (a) ATP is the carrier protein in the ... is hydrolysed by ATPase to release energy (d) Na+-K+ exchange pump operates in the cell.

Last Answer : (b) energy for Na+-K+ exchange pump comes from ATP