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Biomolecules (GATE - XL)

Comprehensive quiz on biomolecules including carbohydrates, proteins, enzymes, metalloproteins, amino acids, coenzymes, and natural products for GATE - XL Life Sciences exam preparation.

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is a pair of ketohexoses?

  1. Mannose and talose
  2. Sorbose and psicose
  3. Arabinose and xylose
  4. Ribulose and xylulose
  5. Erythrose and erythrulose
Question 2 Multiple Choice (Single Answer)

In which of the following is the coordination number of iron 6?

  1. Cytochrome complex
  2. Rubredoxin
  3. Ferredoxin
  1. Only 1
  2. Only 2
  3. Only 3
  4. Both 1 and 2
  5. Both 2 and 3
Question 3 Multiple Choice (Single Answer)

Identify the incorrect statement(s) about peptide linkage.

  1. C-N bond length in peptide link is intermediate in length between typical carbon-nitrogen single bond and carbon-nitrogen double bond.
  2. Peptide bond is planar.
  3. The two alpha carbon atoms attached to C-N are always cis to each other.
  1. Only 1
  2. Only 2
  3. Only 3
  4. Both 1 and 2
  5. Both 2 and 3
Question 4 Multiple Choice (Single Answer)

Which of the following is an example of copper-containing metalloprotein?

  1. Ferritin
  2. Alcohol dehydrogenase
  3. Calmodulin
  4. Dinitrogenase
  5. Plasocyanin
Question 5 Multiple Choice (Single Answer)

Match the entries in column I (protein) and column II (isoelectric point) and select the correct answer.

 
Column I 
        </strong>|<strong> Column II</strong>|

|P. Urease|1. 5.0|
|Q. Haemoglobin|2. 6.8|
|R. Chymotrypsinogen|3. 9.5|
|S. Lysozyme|4. 11.0|

  1. P - 1; Q - 2; R - 3; S - 4
  2. P - 2; Q - 1; R - 3; S - 4
  3. P - 3; Q - 2; R - 4; S - 1
  4. P - 3; Q - 2; R - 1; S - 4
  5. P - 4; Q - 3; R - 2; S - 1
Question 6 Multiple Choice (Single Answer)

Which among the following proteins is made up of five polypeptide chains?

  1. Myoglobin
  2. Haemoglobin
  3. Chymotrypsinogen
  4. RNA polymerase
  5. Titin
Question 7 Multiple Choice (Single Answer)

Which among the following proteins has the largest number of polypeptide chains?

  1. Ribonuclease A
  2. Lysozyme
  3. Chymotrypsin
  4. Hexokinase
  5. Glutamine synthase
Question 8 Multiple Choice (Single Answer)

Which of the following is a pair of zinc-containing enzymes?

  1. Carboxypeptidase and ATPase
  2. Carbonic anhydrase and phosphoglucomutase
  3. Carbonic anhydrase and carboxypeptidase
  4. ATPase and phosphoglucomutase
  5. Phosphoglucomutase and carboxypeptidase
Question 9 Multiple Choice (Single Answer)

Match the following:

 
Column I (Enzyme) 
        </strong>|<strong>Column II (Metal ion)</strong>|

|P. Cytochrome oxidase|1. Ni2+|
|Q. Hexokinase|2. Cu2+|
|R. Arginase|3. Mg2+|
|S. Urease|4. Mn2+|

  1. P - 1; Q - 3; R - 2; S - 4
  2. P - 2; Q - 3; R - 4; S - 1
  3. P - 3; Q - 1; R - 4; S - 2
  4. P - 4; Q - 2; R - 3; S - 1
  5. P - 4; Q - 1; R - 2; S - 3
Question 10 Multiple Choice (Single Answer)

Match the following Fe containing proteins with the corresponding function and oxidation state of Fe.

   
Fe containing proteins 
        </strong>|<strong>Function 
        </strong>|<strong> Oxidation state of Fe</strong>|

|P. Haemoglobin|i. Plasma O2 transport|a. 2|
|Q. Myoglobin|ii. Muscle O2 storage|b. 3|
|R. Transferrin|iii. Plasma Fe transport| |
|S. Catalase|iv. H2O2 metabolism| |

  1. P - ii - a, Q - iv - b, R - i - b, S - iii - b
  2. P - iii - a, Q - iv - a, R - ii - b, S - i - b
  3. P - i - a, Q - ii - a, R - iii - b, S - iv - a
  4. P - ii - b, Q - iii - b, R - iv - a, S - i - a
  5. P - i - b, Q - iii - b, R - ii - a, S - iv - b
Question 11 Multiple Choice (Single Answer)

Which of the following enzymes contains both zinc as well as magnesium ions?

  1. Inorganic pyrophosphatase
  2. Alkaline phosphatase
  3. Collagenase
  4. ATPase
  5. Alcohol dehydrogenase
Question 12 Multiple Choice (Single Answer)

Match the entries in column I (amino acid) and column II (single letter code) and select the correct answer.

 
Column I 
        </strong>|<strong>  Column II</strong>|

|P. Aspartate|1. N|
|Q. Glutamate|2. Q|
|R. Asparagine|3. D|
|S. Glutamine|4. E|

  1. P - 1; Q - 2; R - 3; S - 4
  2. P - 2; Q - 1; R - 4; S - 3
  3. P - 3; Q - 2; R - 4; S - 1
  4. P - 3; Q - 4; R - 1; S - 2
  5. P - 4; Q - 3; R - 2; S - 1
Question 13 Multiple Choice (Single Answer)

Match the entries in column I and column II and select the correct answer.

 
Column I 
        </strong>|<strong> Column II</strong>|

|P. Immunoglobulin G|1. Hemoprotein|
|Q. Casein|2. Flavoprotein|
|R. Succinate dehydrogenase|3. Phosphoprotein|
|S. Haemoglobin|4. Glycoprotein|

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

Match the entries in column I (coenzyme) and column II (its dietary precursor in mammals) and select the correct answer.

 
Column I 
        </strong>|<strong>Column II</strong>|

|P. Coenzyme A|1. Vitamin B1|
|Q. Flavin adenine dinucleotide|2. Vitamin B6|
|R. Thiamine pyrophosphate|3. Vitamin B12|
|S. Pyridoxal phosphate|4. Vitamin B5|

  1. P - 1; Q - 3; R - 2; S - 4
  2. P - 2; Q - 4; R - 1; S - 3
  3. P - 3; Q - 4; R - 1; S - 2
  4. P - 4; Q - 3; R - 1; S - 2
  5. P - 4; Q - 3; R - 2; S - 1
Question 15 Multiple Choice (Single Answer)

Match the following drugs with their plant sources and medical uses.

   
Drug 
        </strong>|<strong>Source plant
        </strong>|<strong> Medical use</strong>|

|P. Colchicine|i. Opium|1. Cough|
|Q. Taxol|ii. Autumn crocus|2. Gout|
|R. Digoxin|iii. Pacific yew|3. Heart disease|
|S. Codeine|iv. Foxglove|4. Cancer treatment|

  1. P - ii - 3; Q - iv - 1; R - i - 2; S - iii - 4
  2. P - iii - 1; Q - iv - 2; R - ii - 4; S - i - 3
  3. P - i - 2; Q - ii - 4; R - iii - 2; S - iv - 3
  4. P - ii - 2; Q - iii - 4; R - iv - 3; S - i - 1
  5. P - i - 4; Q - iii - 1; R - ii - 3; S - iv - 2
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