Features of methylcobalamin include the following: A. It is an active coenzyme form of vit B12 B. It is required for the synthesis of S-adenosyl methionine C. It is specifically indicated for correcting neurological defects of vit B12 deficiency D. All of the above

Features of methylcobalamin include the following:
A. It is an active coenzyme form of vit B12
B. It is required for the synthesis of S-adenosyl
methionine
C. It is specifically indicated for correcting
neurological defects of vit B12 deficiency
D. All of the above
by

1 Answer

Answer :

D. All of the above
by

Related questions

The following calcium channel blocker is specifically indicated to counteract cerebral vasospasm and neurological sequelae following subarachnoid haemorrhage: A. Lacidipine B. Nimodipine C. Nicardipine D. Nitrendipine

Description : The following calcium channel blocker is specifically indicated to counteract cerebral vasospasm and neurological sequelae following subarachnoid haemorrhage: A. Lacidipine B. Nimodipine C. Nicardipine D. Nitrendipine

Last Answer : B. Nimodipine

Neogenesis of methyl group is (A) The availability of methyl group form δ adenosyl methionine (B) The availability of methyl group from betaine (C) Interaction between N5 N10 methylene tetra hydrofolate with a NAD+ dependent reductase (D) Availability of methyl group from methyl B12

Description : Neogenesis of methyl group is (A) The availability of methyl group form δ adenosyl methionine (B) The availability of methyl group from betaine (C) Interaction between N5 N10 methylene tetra hydrofolate with a NAD+ dependent reductase (D) Availability of methyl group from methyl B12

Last Answer : Answer : C

Hydroxocobalamin differs from cyanocobalamin in that: A. It is more protein bound and better retained B. It is beneficial in tobacco amblyopia C. It benefits haematological but not neurological manifestations of vit B12 deficiency D. Both ‘A’ and ‘B’ are correct

Description : Hydroxocobalamin differs from cyanocobalamin in that: A. It is more protein bound and better retained B. It is beneficial in tobacco amblyopia C. It benefits haematological but not neurological manifestations of vit B12 deficiency D. Both ‘A’ and ‘B’ are correct

Last Answer : C. It benefits haematological but not neurological manifestations of vit B12 deficiency

The metabolic reaction requiring vitamin B12 but not folate is: A. Conversion of malonic acid to succinic acid B. Conversion of homocysteine to methionine C. Conversion of serine to glycine D. Thymidylate synthesis

Description : The metabolic reaction requiring vitamin B12 but not folate is: A. Conversion of malonic acid to succinic acid B. Conversion of homocysteine to methionine C. Conversion of serine to glycine D. Thymidylate synthesis

Last Answer : A. Conversion of malonic acid to succinic acid

Methylcobalamin is required for formation of (A) Serin from glycine (B) Glycine from serine (C) Methionine from homocysteine (D) All of these

Description : Methylcobalamin is required for formation of (A) Serin from glycine (B) Glycine from serine (C) Methionine from homocysteine (D) All of these

Last Answer : Answer : C

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

The daily dietary requirement of vit B12 by an adult is: A. 1-3 μg B. 50-100 μg C. 0.1-0.5 mg D. 1-3 mg

Description : The daily dietary requirement of vit B12 by an adult is: A. 1-3 μg B. 50-100 μg C. 0.1-0.5 mg D. 1-3 mg

Last Answer : A. 1-3 μg

One of the main functions of Vitamin K is cofactor for (A) Carboxylate for the formation of γ carboxyglutamate (B) Methylation of δ-adenosyl methionine (C) Carboxylation of biotin (D) One carbon transfer by tetrahydrofolate

Description : One of the main functions of Vitamin K is cofactor for (A) Carboxylate for the formation of γ carboxyglutamate (B) Methylation of δ-adenosyl methionine (C) Carboxylation of biotin (D) One carbon transfer by tetrahydrofolate

Last Answer : Answer : A

The only known physiological methylating agents in the animal organism are (A) Choline and betaine (B) Choline and δ-adenosyl methionine (C) Betaine and δ-adenyosyl methionine (D) Dimehtyl glycine and betaine

Description : The only known physiological methylating agents in the animal organism are (A) Choline and betaine (B) Choline and δ-adenosyl methionine (C) Betaine and δ-adenyosyl methionine (D) Dimehtyl glycine and betaine

Last Answer : Answer : C

That sulfonamides act by inhibiting folate synthesis in bacteria is supported by the following findings except: A. Paraaminobenzoic acid antagonises the action of sulfonamides B. Methionine antagonises the action of sulfonamides C. Purines and thymidine present in pus antagonise the action of sulfonamides D. Bacteria that utilise folic acid taken up from the medium are insensitive to sulfonamides

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Folinic acid is specifically indicated for: A. Prophylaxis of neural tube defect in the offspring of women receiving anticonvulsant medication B. Counteracting toxicity of high dose methotrexate C. Pernicious anaemia D. Anaemia associated with renal failure

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Last Answer : C. Pernicious anaemia

The following drug/drugs does/do not produce any overt CNS effect in normal individuals but exert(s) clear cut therapeutic effect at the same dose in the presence of a specific neurological/psychiatric disorder: A. Chlorpromazine B. Levodopa C. Imipramine D. All of the above

Description : The following drug/drugs does/do not produce any overt CNS effect in normal individuals but exert(s) clear cut therapeutic effect at the same dose in the presence of a specific neurological/psychiatric disorder: A. Chlorpromazine B. Levodopa C. Imipramine D. All of the above

Last Answer : B. Levodopa

Both folic acid and methyl cobalamin (vitamin B12) are required in (A) Deamination of serine (B) Deamination of threonine (C) Conversion of pyridoxal phosphate to pyridoxamine phosphate (D) Methylation of homocystein to methionine

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Last Answer : Answer : D

Features of clindamycin include the following: A. It is primarily active against aerobic gram negative bacilli B. It can be used topically to treat infected acne vulgaris C. It is not absorbed orally D. It is used to treat pseudomembranous enterocolitis

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Last Answer : B. It can be used topically to treat infected acne vulgaris

Features of phenoxymethyl penicillin include the following: A. It is acid stable and orally active B. Its antibacterial spectrum is similar to that of benzyl penicillin C. It is used for less serious penicillin G sensitive infections D. All of the above are correct

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Last Answer : D. All of the above are correct

ndications of piracetam include the following except: A. Apnoea in preterm infant B. Learning defects in children C. Confusional states in the elderly D. Memory impairment following electroconvulsive therapy

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A patient of megaloblastic anaemia was treated with oral folic acid 5 mg daily. After 2 weeks he reported back with cognitive deficit, sensory disturbance, depressed knee jerk, while blood picture and haemoglobin level were improved. What could be the most likely explanation: A. Folic acid was not adequately absorbed resulting in partial response B. Folate therapy has precipitated vitamin B12 deficiency in the neural tissue C. Folate therapy has unmasked pyridoxine deficiency D. Patient has folate reductase abnormality in the nervous system

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Megaloblastic anaemia developing under the following condition is due entirely to folate deficiency not associated with vitamin B12 deficiency: A. Malnutrition B. Blind loop syndrome C. Phenytoin therapy D. Pregnancy

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A 60-year-old patient presented with anorexia, weakness, paresthesia and mental changes. His tongue was red, tendon reflexes were diminished, haemoglobin was 6 g% with large red cells and neutrophils had hypersegmented nuclei. Endoscopy revealed atrophic gastritis. Deficiency of which factor is likely to be responsible for his condition: A. Folic acid B. Vitamin B12 C. Pyridoxine D. Riboflavin

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