21- Which of the following statements concerning abnormalities of the haemoglobin molecule is true?
1) Alpha thalassaemia is due to a deficiency of beta-chain production
2) HbS is caused by a single base mutation on the beta-chain
3) genes for the alpha and beta chains are located on the same chromosome
4) in thalassaemia persistance of HbF is an adverse prognostic sign
5) oliguneoclitide probes may assist in the diagnosis of haemoglobinopathies
Answers-2
Alpha Thalassaemia is due to abnormalities of the alpha chain. Persistence of HbF has survival advnatages in severely affected subjects. C-alpha 16, beta 11. e-Hb
electrophoresis(Dr Shu Ho)
22- The action of noradrenaline released at sympathetic nerve endings is terminated by
1) enzymatic decarboxylation
2) enzymatic inactivation by catechol-O-methyl transferase
3) re-uptake of noradrenaline by the axonal terminals
4) oxidative deamination by monoamine oxidase
5) Removal by the circulating blood
Answers-3
23-A man presents with generalised fatigue and weakness. A diagnosis of Eaton Lambert syndrome is made. An antibody to what cellular component is found in this condition?
1 ) Anti-cholinesterase
2 ) Mitochondria
3 ) Sodium channels
4 ) Potassium channels
5 ) Voltage gated calcium channels
Answer-5
More Questions & Answers:-
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1) Alpha thalassaemia is due to a deficiency of beta-chain production
2) HbS is caused by a single base mutation on the beta-chain
3) genes for the alpha and beta chains are located on the same chromosome
4) in thalassaemia persistance of HbF is an adverse prognostic sign
5) oliguneoclitide probes may assist in the diagnosis of haemoglobinopathies
Answers-2
Alpha Thalassaemia is due to abnormalities of the alpha chain. Persistence of HbF has survival advnatages in severely affected subjects. C-alpha 16, beta 11. e-Hb
electrophoresis(Dr Shu Ho)
22- The action of noradrenaline released at sympathetic nerve endings is terminated by
1) enzymatic decarboxylation
2) enzymatic inactivation by catechol-O-methyl transferase
3) re-uptake of noradrenaline by the axonal terminals
4) oxidative deamination by monoamine oxidase
5) Removal by the circulating blood
Answers-3
23-A man presents with generalised fatigue and weakness. A diagnosis of Eaton Lambert syndrome is made. An antibody to what cellular component is found in this condition?
1 ) Anti-cholinesterase
2 ) Mitochondria
3 ) Sodium channels
4 ) Potassium channels
5 ) Voltage gated calcium channels
Answer-5
More Questions & Answers:-
Page1 Page2 Page3 Page4 Page5
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