What are the functional groups of adenosine?

What are the functional groups of adenosine?
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The genetic defect–adenosine deaminase (ADA) deficiency may be cured permanently by (a) administering adenosine deaminase activators (b) introducing bone marrow cells producing ADA into cells at early embryonic stages (c) enzyme replacement therapy (d) periodic infusion of genetically engineered lymphocytes having functional ADA cDNA

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Which kind of therapy was given in 1990 to a four year old girl with adenosine deaminase (ADA) deficiency?

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Insoinic acid is the biological precursor of (A) Cytosine and Uric acid (B) Adenylve acid and Glucine floc acid (C) Orotic acid and Uridylic acid (D) Adenosine acid Thymidine

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A common substrate of HGPRTase, APRTase and PRPP glutamyl amidotransferase is (A) Ribose 5 phosphate (B) Phosphoribosyl pyrophosphate (C) Hypoxanthine (D) Adenosine

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Trials for gene therapy in human beings were first carried out, with considerable success, in a genetic disease called (A) Cystic fibrosis (B) Thalassemia (C) Adenosine deaminase deficiency (D) Lesch-Nyhan syndrome

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The common features of introns include all the following except (A) The base sequence begins with GU (B) The base sequence ends with AG (C) The terminal AG sequence is preceded by a purine rich tract of ten nucleotides (D) An adenosine residue in branch site participates in splicing

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Mammals other than higher primates do not suffer from gout because they (A) Lack xanthine oxidase (B) Lack adenosine deaminase (C) Lack purine nucleoside phosphorylase (D) Possess uricase

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Inherited deficiency of adenosine deaminase causes (A) Hyperuricaemia and gout (B) Mental retardation (C) Immunodeficiency (D) Dwarfism

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The enzyme common to catabolism of all the purines is (A) Adenosine deaminase (B) Purine nucleoside phosphorylase (C) Guanase (D) None of these

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Salvage of purine bases is regulated by (A) Adenosine phosphoribosyl transferase (B) Hypoxanthine guanine phosphoribosyl transferase (C) Availability of PRPP (D) None of these

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Adenosine kinase can salvage (A) Adenosine (B) Adenosine and deoxyadenosine (C) Adenosine and guanosine (D) Adenine and adenosine

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Deoxycytidine kinase can salvage (A) Adenosine (B) Adenosine and deoxyadenosine (C) Adenosine and guanosine (D) Adenine and adenosine

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The mushroom poison amanitin is an inhibitor of (A) Protein synthesis (B) mRNA synthesis (C) DNA synthesis (D) Adenosine synthesis

Description : The mushroom poison amanitin is an inhibitor of (A) Protein synthesis (B) mRNA synthesis (C) DNA synthesis (D) Adenosine synthesis

Last Answer : Answer : B

5’-Terminus of mRNA molecule is capped with (A) Guanosine triphosphate (B) 7-Methylguanosine triphophate (C) Adenosine triphosphate (D) Adenosine diphosphate

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Last Answer : Answer : B

Enzymic deficiency in β-aminoisobutyric aciduria is (A) Adenosine deaminase (B) Xanthine oxidase (C) Orotidylate decarboxylase (D) Transaminase

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Last Answer : Answer : D

An autosomal recessive disorder, xanthinuria is due to deficiency of the enzymes: (A) Adenosine deaminase (B) Xanthine oxidase (C) HGPRTase (D) Transaminase

Description : An autosomal recessive disorder, xanthinuria is due to deficiency of the enzymes: (A) Adenosine deaminase (B) Xanthine oxidase (C) HGPRTase (D) Transaminase

Last Answer : Answer : B

Lesch-Nyhan syndrome, the sex linked recessive disorder is due to the lack of the enzyme: (A) Hypoxanthine-guanine phosphoribosyl transferse (B) Xanthine oxidase (C) Adenine phosphoribosyl transferase (D) Adenosine deaminase

Description : Lesch-Nyhan syndrome, the sex linked recessive disorder is due to the lack of the enzyme: (A) Hypoxanthine-guanine phosphoribosyl transferse (B) Xanthine oxidase (C) Adenine phosphoribosyl transferase (D) Adenosine deaminase

Last Answer : Answer : A

The correct sequence of the reactions of catabolism of adenosine to uric acid is (A) Adenosine→hypoxanthine→xanthine→uric acid (B) Adenosine→xanthine→inosine→uric acid (C) Adenosine→inosine→hypoxanthine→ xanthine uric acid (D) Adenosine→xanthine→inosine→hypoxanthine uric acid

Description : The correct sequence of the reactions of catabolism of adenosine to uric acid is (A) Adenosine→hypoxanthine→xanthine→uric acid (B) Adenosine→xanthine→inosine→uric acid (C) Adenosine→inosine→hypoxanthine→ xanthine uric acid (D) Adenosine→xanthine→inosine→hypoxanthine uric acid

Last Answer : Answer : C

Phosphorylation of adenosine to AMP is catalysed by (A) Adenosine kinase (B) Deoxycytidine kinase (C) Adenylosuccinase (D) Adenylosuccinate synthetase

Description : Phosphorylation of adenosine to AMP is catalysed by (A) Adenosine kinase (B) Deoxycytidine kinase (C) Adenylosuccinase (D) Adenylosuccinate synthetase

Last Answer : Answer : A

Uracil and ribose form (A) Uridine (B) Cytidine (C) Guanosine (D) Adenosine

Description : Uracil and ribose form (A) Uridine (B) Cytidine (C) Guanosine (D) Adenosine

Last Answer : Answer : A

Adrenalin is synthesized from (A) Adenine (B) Adenosine (C) Tyrosine (D) Tryptophan 230 MCQs IN BIOCHEMISTRY

Description : Adrenalin is synthesized from (A) Adenine (B) Adenosine (C) Tyrosine (D) Tryptophan 230 MCQs IN BIOCHEMISTRY

Last Answer : Answer : C

The evaluation of a patient scheduled for elective surgery should always include the following as tests of hemostasis and coagulation: A. History and physical examination. B. Complete blood count (CBC), including platelet count. C. Prothrombin time (PT) and activated partial thromboplastin time (APTT). D. Studies of platelet aggregation with adenosine diphosphate (ADP) and epinephrine.

Description : The evaluation of a patient scheduled for elective surgery should always include the following as tests of hemostasis and coagulation: A. History and physical examination. B. Complete blood count ( ... (APTT). D. Studies of platelet aggregation with adenosine diphosphate (ADP) and epinephrine.

Last Answer : Answer: A DISCUSSION: The evaluation of most patients scheduled for elective surgery who do not have a history of significant bleeding disorders is somewhat controversial. An adequate history and ... suspected of having qualitative defects of platelet function (e.g., von Willebrand's disease)

Which of the following statements are true of oxidants? A. In addition to their pathophysiologic roles in inflammation, injury, and infection, oxidants also have physiologic roles. B. Oxidants may be generated from activated neutrophils and during reperfusion following a period of ischemia. C. The deleterious effects of oxidants include lipid peroxidation and cell membrane damage, oxidative damage to DNA, and inhibition of adenosine triphosphate (ATP) synthesis. D. The mechanism of ischemia-reperfusion injury involved the catalytic production of superoxide anion (O 2•) by the enzyme xanthine oxidase.

Description : Which of the following statements are true of oxidants? A. In addition to their pathophysiologic roles in inflammation, injury, and infection, oxidants also have physiologic roles. B. Oxidants may ... involved the catalytic production of superoxide anion (O 2 ) by the enzyme xanthine oxidase.

Last Answer : Answer: ABCD DISCUSSION: Oxidants are reactive oxygen metabolites that have both physiologic and pathophysiologic roles. As potent oxidizing agents, oxidants are involved in cytochrome P ... leukocyte infiltration and activation, causing further tissue damage by the release of cytotoxic proteases