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Metalloenzymes and Metal-Containing Biomolecules (GATE)

Questions cover metal-containing enzymes, proteins, and biological metal ions, focusing on their structure, function, and roles in biological systems

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is a tungsten-containing metalloenzyme?

  1. Formaldehyde ferredoxin oxidoreductase
  2. Carboxypeptidase A
  3. Carbon monoxide dehydrogenase
  1. Only 1
  2. Only 2
  3. Only 3
  4. 1 and 2
  5. 2 and 3
Question 2 Multiple Choice (Single Answer)

Iron is an extremely important transition metal in biology. It helps to perform many different biological functions, such as

  1. transport of O2 to tissues
  2. release of O2 to muscle cells
  3. cofactor to some enzymes
  1. Only 1
  2. Only 2
  3. Only 3
  4. 1 and 2
  5. 1, 2 and 3
Question 3 Multiple Choice (Single Answer)

Which of the following statements is/are correct about haemoglobin?

  1. Each haemoglobin molecule can combine with two oxygen molecules.
  2. Each haemoglobin molecule contains two globin units with two heme units.
  3. Deoxy- and oxyhaemoglobin have different colours.
  1. Only 1
  2. Only 2
  3. Only 3
  4. 1 and 2
  5. 2 and 3
Question 4 Multiple Choice (Single Answer)

Pernicious anaemia is one of the obvious symptoms of ________ deficiency.

  1. molybdenum
  2. calcium
  3. nickel
  4. cobalt
  5. magnesium
Question 5 Multiple Choice (Single Answer)

Which of the following is a selenium-containing enzyme?

  1. Glutathione peroxidase
  2. Carbonic anhydrase
  3. Urease
  4. Dopamine beta-hydroxylase
  5. Tyrosinase
Question 6 Multiple Choice (Single Answer)

Which of the following is/are copper-containing enzyme(s)?

P. Carbonic anhydrase
Q. Urease
R. Catechol dioxygenase
S. Galactose oxidase

  1. Only P
  2. Q and R
  3. Only R
  4. R and S
  5. Only S
Question 7 Multiple Choice (Single Answer)

Which of the following are biological functions of Mg(II)?

  1. Present in chlorophyll and helps in photosynthesis
  2. Activation of enzymes
  3. Information carrier
  4. Osmotic balance
  1. 1 and 2
  2. 1, 2 and 3
  3. 1, 2 and 4
  4. 2 and 4
  5. 2, 3 and 4
Question 8 Multiple Choice (Single Answer)

Match the following:

 
Column I Column II
P. Arginase 1. Zn
Q. Phosphotransferase 2. Mn
R. Cytochrome Oxidase 3. Mg
S. Alcohol dehydrogenase 4. Cu
  1. P - 1, Q - 2, R - 3, S - 4
  2. P - 1, Q - 3, R - 4, S - 2
  3. P - 2, Q - 4, R - 3, S - 1
  4. P - 2, Q - 3, R - 4, S - 1
  5. P - 3, Q - 1, R - 4, S - 2
Question 9 Multiple Choice (Single Answer)

Which of the following drugs is used to cure cancer?

  1. Amoxicillin
  2. Cefuroxime
  3. Budotitane
  4. Atenolol
  5. Bismuth subsalicylate
Question 10 Multiple Choice (Single Answer)

Which of the following is used as anti-copper agent in Wilson’s disease?

  1. Tetrathiomolybdate
  2. Selenium sulphide
  3. Silver sulfadiazine
  4. Technetium
  5. Barium sulphate
Question 11 Multiple Choice (Single Answer)

Match the entries:

 
Elements Used in the treatment
P. Li 1. Gastritis
Q. Pt 2. Rheumatoid arthritis
R. Au 3. Bipolar disorder
S. Bi 4. Cancer
  1. P - 4, Q - 2, R - 1, S - 3
  2. P - 3, Q - 4, R - 2, S - 1
  3. P - 2, Q - 3, R - 4, S - 1
  4. P - 1, Q - 4, R - 2, S - 3
  5. P - 1, Q - 3, R - 2, S - 4
Question 12 Multiple Choice (Single Answer)

Which of the following are copper-containing proteins involved in electron transfer?

  1. Plastocyanins
  2. Ceruloplasmins
  3. Amicyanins
  1. Only 1
  2. 1 and 3
  3. Only 2
  4. 2 and 3
  5. 1, 2 and 3
Question 13 Multiple Choice (Single Answer)

Which of the following matchings is/are incorrect?

P. Tyrosinase : Copper
Q. Urease : Copper
R. Dopamine β-hydroxylase : Nickel
S. Catechol dioxygenase : Iron

  1. P and Q
  2. P and S
  3. Q and R
  4. Q and S
  5. R and S
Question 14 Multiple Choice (Single Answer)

Match the following:

 
Column I Column II
P. Selenium 1. Anti-dandruff
Q. Magnesium 2. Antacid
R. Antimony 3. Antileishmaniasis
S. Tin 4. Anti-caries
  1. P - 1, Q - 2, R - 3, S - 4
  2. P - 1, Q - 3, R - 2, S - 4
  3. P - 2, Q - 1, R - 4, S - 3
  4. P - 2, Q - 3, R - 1, S - 4
  5. P - 4, Q - 3, R - 2, S - 1
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