Vitamin K is involved in posttranslational modification of the blood clotting factors by acting as cofactor for the enzyme (A) Carboxylase (B) Decarboxylase (C) Hydroxylase (D) Oxidase

Vitamin K is involved in posttranslational modification of the blood clotting  factors by acting as cofactor for the enzyme

(A) Carboxylase (B) Decarboxylase (C) Hydroxylase (D) Oxidase
by

1 Answer

Answer :

(A) Carboxylase
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Vitamin K is involved in posttranslational modification of the blood clotting factors by acting as cofactor for the enzyme: (A) Carboxylase (B) Decarboxylase (C) Hydroxylase (D) Oxidase

Description : Vitamin K is involved in posttranslational modification of the blood clotting factors by acting as cofactor for the enzyme: (A) Carboxylase (B) Decarboxylase (C) Hydroxylase (D) Oxidase

Last Answer : Answer : A

Biotin is a coenzyme of the enzyme (A) Carboxylase (B) Hydroxylase (C) Decarboxylase (D) Deaminase

Description : Biotin is a coenzyme of the enzyme (A) Carboxylase (B) Hydroxylase (C) Decarboxylase (D) Deaminase

Last Answer : (A) Carboxylase

Biotin is a coenzyme of the enzyme (A) Carboxylase (B) Hydroxylase (C) Decarboxylase (D) Deaminase

Description : Biotin is a coenzyme of the enzyme (A) Carboxylase (B) Hydroxylase (C) Decarboxylase (D) Deaminase

Last Answer : Answer : A

The defective enzyme in histidinemia is (A) Histidine carboxylase (B) Histidine decarboxylase (C) Histidase (D) Histidine oxidase

Description : The defective enzyme in histidinemia is (A) Histidine carboxylase (B) Histidine decarboxylase (C) Histidase (D) Histidine oxidase

Last Answer : Answer : C

β-Carotene, precursor of vitamin A, is oxidatively cleaved by (A) β-Carotene dioxygenase (B) Oxygenase \ (C) Hydroxylase (D) Transferase

Description : β-Carotene, precursor of vitamin A, is oxidatively cleaved by (A) β-Carotene dioxygenase (B) Oxygenase \ (C) Hydroxylase (D) Transferase

Last Answer : (A) β-Carotene dioxygenase

An enzyme involved in catabolism of catecholamines is (A) Dopa decarboxylase (B) Aromatic amino acid decarboxylase (C) Monoamine oxidase (D) Catechol oxidas

Description : An enzyme involved in catabolism of catecholamines is (A) Dopa decarboxylase (B) Aromatic amino acid decarboxylase (C) Monoamine oxidase (D) Catechol oxidas

Last Answer : Answer : C

The enzyme involved in variegate porphyria is (A) Protoporphyrinogen oxidase (B) Coproporphyrinogen oxidase (C) Uroporphyrinogen decarboxylase (D) ALA decarboxylase

Description : The enzyme involved in variegate porphyria is (A) Protoporphyrinogen oxidase (B) Coproporphyrinogen oxidase (C) Uroporphyrinogen decarboxylase (D) ALA decarboxylase

Last Answer : Answer : A

One of the main functions of Vitamin K is the cofactor for (A) Carboxylase for the formation of γ--carboxy glutamate (B) Methylation by S-adenosyl methionine (C) Carboxylation by biotin (D) One carbon transfer by tetra hydrofolate

Description : One of the main functions of Vitamin K is the cofactor for (A) Carboxylase for the formation of γ--carboxy glutamate (B) Methylation by S-adenosyl methionine (C) Carboxylation by biotin (D) One carbon transfer by tetra hydrofolate

Last Answer : Answer : A

Which ot the following vitamin is involved in coenzyme function in tansaminations? (A) Nicotinamide (B) Pyridoxine (C) Thiamine (D) Riboflavin

Description : Which ot the following vitamin is involved in coenzyme function in tansaminations? (A) Nicotinamide (B) Pyridoxine (C) Thiamine (D) Riboflavin

Last Answer : B) Pyridoxine

Vitamin B1 coenzyme (TPP) is involved in (A) Oxidative decarboxylation (B) Hydroxylation (C) Transamination (D) Carboxylation

Description : Vitamin B1 coenzyme (TPP) is involved in (A) Oxidative decarboxylation (B) Hydroxylation (C) Transamination (D) Carboxylation

Last Answer : (A) Oxidative decarboxylation

Antirachitic vitamin is (A) Vitamin A (B) Vitamin D (C) Vitamin E (D) Vitamin K

Description : Antirachitic vitamin is (A) Vitamin A (B) Vitamin D (C) Vitamin E (D) Vitamin K

Last Answer : (D) Vitamin K

Creatinuria is caused due to the deficiency of vitamin (A) A (B) K (C) E (D) D

Description : Creatinuria is caused due to the deficiency of vitamin (A) A (B) K (C) E (D) D

Last Answer : (C) E

Platelets contain an enzyme which has important role in clotting in blood. This enzyme is known as (A) Cholinesterase (B) Transaminase (C) Decarboxylase (D) Thrombokinase

Description : Platelets contain an enzyme which has important role in clotting in blood. This enzyme is known as (A) Cholinesterase (B) Transaminase (C) Decarboxylase (D) Thrombokinase

Last Answer : Answer : D

In the synthetic pathway of epinephrine, disulfiram (antabuse) inhibits the enzyme: (A) Tyrosine hydroxylase (B) Dopamine β-hydroxylase (C) DOPA decarboxylase (D) N-methyl transferase

Description : In the synthetic pathway of epinephrine, disulfiram (antabuse) inhibits the enzyme: (A) Tyrosine hydroxylase (B) Dopamine β-hydroxylase (C) DOPA decarboxylase (D) N-methyl transferase

Last Answer : Answer : B

For Catecholamine biosynthesis the rate limiting enzyme is (A) DOPA decarboxylase (B) DOPAMINE β-hydroxylase (C) Tyrosine hydroxylase (D) Phenylalanine hydroxylase

Description : For Catecholamine biosynthesis the rate limiting enzyme is (A) DOPA decarboxylase (B) DOPAMINE β-hydroxylase (C) Tyrosine hydroxylase (D) Phenylalanine hydroxylase

Last Answer : Answer : C

An inborn error, maple syrup urine disease is due to deficiency of the enzyme: (A) Isovaleryl-CoAhydrogenase (B) Phenylalnine hydroxylase (C) Adenosyl transferase (D) α-Ketoacid decarboxylase

Description : An inborn error, maple syrup urine disease is due to deficiency of the enzyme: (A) Isovaleryl-CoAhydrogenase (B) Phenylalnine hydroxylase (C) Adenosyl transferase (D) α-Ketoacid decarboxylase

Last Answer : Answer : D

The rate limiting enzyme in the synthesis of catecholamines is: A. Tyrosine hydroxylase B. Dopa decarboxylase C. Dopamine β-hydroxylase D. Noradrenaline N-methyl transferase

Description : The rate limiting enzyme in the synthesis of catecholamines is: A. Tyrosine hydroxylase B. Dopa decarboxylase C. Dopamine β-hydroxylase D. Noradrenaline N-methyl transferase

Last Answer : A. Tyrosine hydroxylase

The rate limiting enzyme in the synthesis of catecholamines is: A. Tyrosine hydroxylase B. Dopa decarboxylase C. Dopamine β-hydroxylase D. Noradrenaline N-methyl transferase

Description : The rate limiting enzyme in the synthesis of catecholamines is: A. Tyrosine hydroxylase B. Dopa decarboxylase C. Dopamine β-hydroxylase D. Noradrenaline N-methyl transferase

Last Answer : A. Tyrosine hydroxylase

Concentration of pyruvic acid and lactic acid in blood is increased due to deficiency of the vitamin (A) Thiamin (B) Riboflavin (C) Niacin (D) Pantothenic acid

Description : Concentration of pyruvic acid and lactic acid in blood is increased due to deficiency of the vitamin (A) Thiamin (B) Riboflavin (C) Niacin (D) Pantothenic acid

Last Answer : (A) Thiamin

Conversion of uroporphyrinogen III to coprophyrinogen III is catalysed by the enzyme.: (A) Uroporphyrinogen decarboxylase (B) Coproporphyrinogen oxidase (C) Protoporphyrinogen oxidase (D) Ferrochelatase

Description : Conversion of uroporphyrinogen III to coprophyrinogen III is catalysed by the enzyme.: (A) Uroporphyrinogen decarboxylase (B) Coproporphyrinogen oxidase (C) Protoporphyrinogen oxidase (D) Ferrochelatase

Last Answer : Answer : A

Pantothenic acid is a constituent of the coenzyme involved in (A) Decarboxylation (B) Dehydrogenation (C) Acetylation (D) Oxidation

Description : Pantothenic acid is a constituent of the coenzyme involved in (A) Decarboxylation (B) Dehydrogenation (C) Acetylation (D) Oxidation

Last Answer : (C) Acetylation

A deficiency of copper effects the formation of normal collagen by reducing the activity of which of the following enzyme? (A) Prolyl hydroxylase (B) Lysyl oxidase (C) Lysyl hydroxylase (D) Glucosyl transferase

Description : A deficiency of copper effects the formation of normal collagen by reducing the activity of which of the following enzyme? (A) Prolyl hydroxylase (B) Lysyl oxidase (C) Lysyl hydroxylase (D) Glucosyl transferase

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Selenium is a constituent of the enzyme: (A) Glutathione peroxidase (B) Homogentisate oxidase (C) Tyrosine hydroxylase (D) Phenylalanin hydroxylase

Description : Selenium is a constituent of the enzyme: (A) Glutathione peroxidase (B) Homogentisate oxidase (C) Tyrosine hydroxylase (D) Phenylalanin hydroxylase

Last Answer : Answer : A

The deficiency of copper decreases the activity of the enzyme: (A) Lysine oxidase (B) Lysine hydroxylase (C) Tyrosine oxidase (D) Proline hydroxylase

Description : The deficiency of copper decreases the activity of the enzyme: (A) Lysine oxidase (B) Lysine hydroxylase (C) Tyrosine oxidase (D) Proline hydroxylase

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Albinism is due to deficiency of the enzyme: (A) Phenylalanine hydroxylase (B) Tyrosinase (C) p-Hydroxyphenylpyruvic acid oxidase (D) Tyrosine dehydrogenase

Description : Albinism is due to deficiency of the enzyme: (A) Phenylalanine hydroxylase (B) Tyrosinase (C) p-Hydroxyphenylpyruvic acid oxidase (D) Tyrosine dehydrogenase

Last Answer : Answer : C

Alkaptonuria occurs due to deficiency of the enzyme: (A) Maleylacetoacetate isomerase (B) Homogentisate oxidase (C) p-Hydroxyphenylpyruvate hydroxylase (D) Fumarylacetoacetate hydrolase

Description : Alkaptonuria occurs due to deficiency of the enzyme: (A) Maleylacetoacetate isomerase (B) Homogentisate oxidase (C) p-Hydroxyphenylpyruvate hydroxylase (D) Fumarylacetoacetate hydrolase

Last Answer : Answer : B

Aside from vitamin pills how can I get vitamin e?

Description : Aside from vitamin pills how can I get vitamin e?

Last Answer : Avocados, tofu, almonds, to name a few.

Is it significant if a B-complex vitamin stains urine?

Description : Is it significant if a B-complex vitamin stains urine?

Last Answer : B-vitamins are water soluble and you will piss bright yellow any surplus. If you feel improvement, consider taking a lower dosage and seeing if that is adequate.

What would happen if I accidentally took an extra vitamin dose for the day?

Description : What would happen if I accidentally took an extra vitamin dose for the day?

Last Answer : Nothing

What is the point in taking Vitamin supplements?

Description : What is the point in taking Vitamin supplements?

Last Answer : Most diets are missing some of the vitamins. Just don’t go overboard on the fat soluble vitamins, they can have side affects. And, Welcome to fluther.

What vitamin brand makes small calcium pills?

Description : What vitamin brand makes small calcium pills?

Last Answer : answer:We give my very old mother “Citracal Petites” because they are small. http://www.citracal.com/Product/Tablets-Caplets.aspx

Sterilized milk is devoid of (A) Vitamin A (B) Vitamin B1 (C) Vitamin C (D) Vitamin D

Description : Sterilized milk is devoid of (A) Vitamin A (B) Vitamin B1 (C) Vitamin C (D) Vitamin D

Last Answer : (C) Vitamin C

Deficiency of vitamin B12 can be diagonised by (A) Carr-Price reaction (B) Ames assay (C) Watson-Schwartz test (D) Schilling test

Description : Deficiency of vitamin B12 can be diagonised by (A) Carr-Price reaction (B) Ames assay (C) Watson-Schwartz test (D) Schilling test

Last Answer : (D) Schilling test

‘Xanthurenic acid index’ is a reliable criterion for the deficiency of the vitamin (A) Pyridoxal (B) Thiamin (C) Pantothenic acid (D) Cobalamin

Description : ‘Xanthurenic acid index’ is a reliable criterion for the deficiency of the vitamin (A) Pyridoxal (B) Thiamin (C) Pantothenic acid (D) Cobalamin

Last Answer : (A) Pyridoxal

Magenta tongue is found in the deficiency of the vitamin (A) Riboflavin (B) Thiamin (C) Nicotinic acid (D) Pyridoxine

Description : Magenta tongue is found in the deficiency of the vitamin (A) Riboflavin (B) Thiamin (C) Nicotinic acid (D) Pyridoxine

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The most potent Vitamin D metabolite is (A) 25-Hydroxycholecalciferol (B) 1,25-Dihydroxycholecalciferol (C) 24, 25-Dihydroxycholecalciferol (D) 7-Dehydrocholesterol

Description : The most potent Vitamin D metabolite is (A) 25-Hydroxycholecalciferol (B) 1,25-Dihydroxycholecalciferol (C) 24, 25-Dihydroxycholecalciferol (D) 7-Dehydrocholesterol

Last Answer : (B) 1,25-Dihydroxycholecalciferol

Carr-Price reaction is used to detect (A) Vitamin A (B) Vitamin D (C) Ascorbic acid (D) Vitamin E

Description : Carr-Price reaction is used to detect (A) Vitamin A (B) Vitamin D (C) Ascorbic acid (D) Vitamin E

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Deficiency of Vitamin A causes (A) Xeropthalmia (B) Hypoprothrombinemia (C) Megaloblastic anemia (D) Pernicious anemia

Description : Deficiency of Vitamin A causes (A) Xeropthalmia (B) Hypoprothrombinemia (C) Megaloblastic anemia (D) Pernicious anemia

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Vitamin A or retinal is a (A) Steroid (B) Polyisoprenoid compound containing a cyclohexenyl ring (C) Benzoquinone derivative (D) 6-Hydroxychromane

Description : Vitamin A or retinal is a (A) Steroid (B) Polyisoprenoid compound containing a cyclohexenyl ring (C) Benzoquinone derivative (D) 6-Hydroxychromane

Last Answer : (B) Polyisoprenoid compound containing a cyclohexenyl ring

Vitamin K regulates the synthesis of blood clotting factors. (A) VII (B) IX (C) X (D) All of these

Description : Vitamin K regulates the synthesis of blood clotting factors. (A) VII (B) IX (C) X (D) All of these

Last Answer : Answer : D

Vitamin K regulates the synthesis of blood clotting factors: (A) VII (B) IX (C) X (D) All of these

Description : Vitamin K regulates the synthesis of blood clotting factors: (A) VII (B) IX (C) X (D) All of these

Last Answer : Answer : D

What is the organ where most of the clotting factors are produced? What is the role of vitamin K in the blood coagulation?

Description : What is the organ where most of the clotting factors are produced? What is the role of vitamin K in the blood coagulation?

Last Answer : Most of the clotting factors are produced in the liver. Vitamin K participates in the activation of several clotting factors and it is fundamental for the well-functioning of the blood coagulation.

A patient who has been taking quantities of aspirin might show increased post operative bleeding because aspirin inhibits:** A. Synthesis of thromboxane A2 and prevents platelet aggregation B. Synthesis of prostacyclin and prevents platelet aggregation C. Synthesis of prostaglandin and prevents production of blood platelets D. Thrombin and prevents formation of the fibrin network E. Increase the absorption of vitamin K and prevents synthesis of blood clotting factors

Description : A patient who has been taking quantities of aspirin might show increased post operative bleeding because aspirin inhibits:** A. Synthesis of thromboxane A2 and prevents platelet aggregation B. ... network E. Increase the absorption of vitamin K and prevents synthesis of blood clotting factors

Last Answer : A. Synthesis of thromboxane A2 and prevents platelet aggregation

During deficiency of thiamine the concentration of the following compound rises in blood and intracellular fluid: (A) Glycogen (B) Sugar (C) Amino acids (D) Pyruvic acid

Description : During deficiency of thiamine the concentration of the following compound rises in blood and intracellular fluid: (A) Glycogen (B) Sugar (C) Amino acids (D) Pyruvic acid

Last Answer : (D) Pyruvic acid

Which of the following is/are not a substrate or cofactor for prolyl hydroxylase? A. Alpha-ketoglutarate. B. Ascorbate. C. Biotin. D. Oxygen. E. Copper.

Description : Which of the following is/are not a substrate or cofactor for prolyl hydroxylase? A. Alpha-ketoglutarate. B. Ascorbate. C. Biotin. D. Oxygen. E. Copper.

Last Answer : Answer: CE DISCUSSION: Prolyl hydroxylase is one of the rate-limiting enzymes in collagen synthesis. Substrates and cofactors such as iron, alpha-ketoglutarate, ascorbate, and oxygen are ... broken down. Thus, ascorbate deficiency (scurvy) and hypoxia have similar effects on collagen synthesis

The rate limiting step in catecholamine synthesis is catalysed by (A) Phenylalanine hydroxylase (B) Tyrosine hydroxylase (C) Dopa decarboxylase (D) Phenylethanolamine N-methyl transferase

Description : The rate limiting step in catecholamine synthesis is catalysed by (A) Phenylalanine hydroxylase (B) Tyrosine hydroxylase (C) Dopa decarboxylase (D) Phenylethanolamine N-methyl transferase

Last Answer : Answer : B

The biosynthesis of both Catecholamine and serotonin require (A) Tyrosine hydroxylase (B) N-methyl transferase (C) Aromatic amino acid decarboxylase (D) Tryptophan pyrrolase

Description : The biosynthesis of both Catecholamine and serotonin require (A) Tyrosine hydroxylase (B) N-methyl transferase (C) Aromatic amino acid decarboxylase (D) Tryptophan pyrrolase

Last Answer : Answer : B

In presence of the following cofactor, pyruvate carboxylase converts pyruvate to oxaloacetate: (A) ATP, Protein and CO2 (B) CO2 and ATP (C) CO2 (D) Protein

Description : In presence of the following cofactor, pyruvate carboxylase converts pyruvate to oxaloacetate: (A) ATP, Protein and CO2 (B) CO2 and ATP (C) CO2 (D) Protein

Last Answer : A

The standard management oral anticoagulant therapy for chronic treatment of venous thromboembolism is with the drug warfarin. Which of the following statement(s) is/are true concerning the administration of warfarin? a. An important complication of warfarin therapy is skin necrosis in patients with protein C deficiency b. Warfarin interferes with vitamin K dependent clotting factors II, VII, IX, X c. For effective anticoagulation the prothrombin time (PT) should be kept at 2 control d. It is recommended that warfarin be continued for at least one year after initial episode of deep venous thrombosis

Description : The standard management oral anticoagulant therapy for chronic treatment of venous thromboembolism is with the drug warfarin. Which of the following statement(s) is/are true concerning the administration ... warfarin be continued for at least one year after initial episode of deep venous thrombosis

Last Answer : Answer: a, b Warfarin interferes with the vitamin K dependent clotting factors II, VII, IX and X, protein C, and protein S. An important complication of warfarin is skin ... the benefit from anticoagulant therapy and thus is the basis for discontinuing warfarin administration at this time

Molybdenum is a cofactor for (A) Xanthine oxidase (B) Aldehyde oxidase (C) Sulphite oxidase (D) All of these

Description : Molybdenum is a cofactor for (A) Xanthine oxidase (B) Aldehyde oxidase (C) Sulphite oxidase (D) All of these

Last Answer : Answer : D