Biochemistry or Metabolism (CC-104) Past Paper 2022 PDF

# UM(1)-Zool(CC-104) Biochem or Metabolism ## 2022 **Full Marks:** 70 **Time:** 3 hours ### Instructions - Q.No. 1 is compulsory. - There are two groups of long answer type questions. - Candidates are required to answer three questions, not selecting more than two from each group. - The figures in...

# UM(1)-Zool(CC-104) Biochem or Metabolism ## 2022 **Full Marks:** 70 **Time:** 3 hours ### Instructions - Q.No. 1 is compulsory. - There are two groups of long answer type questions. - Candidates are required to answer three questions, not selecting more than two from each group. - The figures in the right-hand margin indicate marks. - Candidates are required to answer in their own words as far as practicable. ## Question 1: Choose the correct answer: (1x10) ### (i) In a protein amino acids are linked together by: - (a) Hydrogen bond - (b) Glycosidic bond - **(c) Peptide bond** - (d) Sulphide bond ### (ii) In which of the following process, a glucose molecule splits into two pyruvate molecules? - (a) Glycogenesis - **(b) Glycolysis** - (c) Gluconeogenesis - (d) Glycogenolysis ### (iii) "Lock and key" theory of enzyme action was proposed by - **(a) Fischer** - (b) Kuhne - (c) Arrhenius - (d) Koshland ### (iv) Identify the purine base of nucleic acids in the following - (a) Cytosine - (b) Thymine - (c) Uracil - **(d) Adenine** ### (v) Which of the following are examples of disaccharides? - (a) Starch and Glycogen - (b) Glucose and Galactose - **(c) Sucrose and Maltose** - (d) None of these ### (vi) α-helix and β-pleated sheet are observed in which of the following structure of protein? - (a) Tertiary structure - **(b) Secondary structure** - (c) Primary structure - (d) Quaternary structure ### (vii) What is the composition of nucleotides? - (a) a sugar + a phosphate - (b) a base + a sugar - (c) a base + a phosphate - **(d) a base + a sugar + phosphate** ### (viii) Group of adjacent nucleotide joined by - **(a) Phosphodiester bond** - (b) Peptide bond - (c) Glycosidic bond - (d) Covalent bond ### (ix) Blocking enzyme action by blocking its active site is called as: - **(a) Allosteric inhibition** - (b) Feedback inhibition - (c) Competitive inhibition - (d) Non-competitive inhibition ### (x) Which of the following hormone is responsible for increasing gluconeogenesis in the liver during prolonged starvation? - (a) TSH - (b) Insulin - (c) Thymine - **(d) Glucagon** ## Long Answer Type Questions: (20x3) ### Group A - 2. What are proteins? Give a general account of the structure of proteins. - 3. Give a brief account of the structure and location of carbohydrates. - 4. Describe about the structure of nucleic acids. ### Group B - 5. Give a brief account of the structure and function of the electron transport chain. - 6. Describe about the steps involved in gluconeogenesis. What is the main function of Gluconeogenesis? - 7. What are enzymes? What are the functions of enzymes? What does it mean by lowering of activation energy? - 8. What is β-oxidation of fatty acids? How fatty acids get synthesized? - 9. Describe the mechanism, function, and significance of Glycogenesis.