Mineral Metabolism - Mock Test 15

Question 141

Haem synthetase is congenitally deficient in?

A) Congenital erythropoietic porphyria B) Protoporphyria C) Hereditary coproporphyria D) Variegate porphyria

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Question 142

In thalassemia, an amino acid is substituted in?

A) Alpha chain B) Beta chain C) Alpha and beta chains D) Any chain

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Question 143

Cyanmethaemoglobin can be formed from?

A) Oxy Hb B) Met Hb C) Carboxy Hb D) All of these

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Question 144

Sigmoidal oxygen dissociation curve is a property of?

A) Haemoglobin B) Carboxyhaemoglobin C) Myoglobin D) Methaemoglobin

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Question 145

Regulation of haem synthesis occurs by?

A) Covalent modification B) Repression - derepression C) Induction D) Allosteric regulation

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Question 146

The regulatory enzyme for haem synthesis is?

A) ALA synthetase B) haem synthetase C) Both 1⃣ and 2⃣ D) None of these

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Question 147

Which of the following coenzyme is required for porphyrin synthesis?

A) Coenzyme A B) Pyridoxal phosphate C) Both 1⃣ and 2⃣ D) None of these

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Question 148

An amino acid required for porphyrin synthesis is?

A) Proline B) Glycine C) Serine D) Histidine

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Question 149

The porphyrin present in haem is?

A) Uroporphyrin B) Protoporphyrin I C) Coproporphyrin D) Protoporphyrin II

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Question 150

Hydrogen peroxide may be detoxified in the absence of an oxygen acceptor by?

A) Peroxidase B) Catalase C) Both 1⃣ and 2⃣ D) None of these

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