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Biochemistry

Gas Chromatography – Section 1

1. Which of the following is not used for detection in GC? A. Infrared spectroscopy B. NMR C. Flame ionisation D. Electrical conductivity Answer: Option B 2. Which of these effects result from slow injection of a large sample volume? A. Increased resolution B. Decreased resolution C. Non-linear detector response …

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FT IR Spectroscopy – Section 1

1. Which of the following is the basis of first dimension of separation for two-dimensional electrophoresis? A. Molecular mass B. Solubility C. Isoelectric point D. Folding Answer: Option C 2. What is meant by rotating frame of reference? A. That the sample is spun rapidly in the applied field B. …

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NMR Spectroscopy – Section 1

1. What is shielding in NMR? A. Using a curved piece of metal to block an opponents attack B. Putting metal around an Rf source C. When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei D. Blocking parts of a molecule from Rf …

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Minerals – Section 1

1. Which of the following mineral is involved in protein metabolism and oxidation reactions? A. Molybdenum B. Manganese C. Magnesium D. calcium Answer: Option A 2. Which of the following mineral deficiency may result into impaired growth and development, skin lesions and loss of appetite? A. Zinc B. Cobalt C. …

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Amino Acid Metabolism – Section 1

1. Histidine is degraded to α-ketoglutarate and is described as a A. gluco amino acid B. glucogenic amino acid C. ketogenic amino acid D. keto-gluco amino acid Answer: Option B 2. Which of the following amino acids is considered as both ketogenic and glucogenic? A. Valine B. Tryptophan C. Lysine …

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Photosynthesis and Respiration – Section 1

1. Which of the following is the reduced form of a temporary electron carrier molecule? A. FADH2 B. ATP C. NADP+ D. CO2 Answer: Option A 2. Which one of the following is a product of both cyclic and noncyclic photophosphorylation? A. NADPH B. O2 C. ATP D. Carbohydrate Answer: …

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TCA Cycle – Section 1

1. How many molecules of ATPs are synthesized per NADH oxidation? A. 2 B. 1 C. 3 D. 4 Answer: Option C 2. Why is the TCA cycle the central pathway of metabolism of the cell? A. It occurs in the center of the cell B. Its intermediates are commonly …

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Lipid – Section 1

1. The key enzyme in the regulation of fatty acid synthesis is A. acetyl CoA carboxylase B. AMP activated proteinkinase C. protein phosphatase D. none of these Answer: Option A 2. Arachidonate has 20 carbon atoms with A. 3 double bonds B. 2 double bonds C. 4 double bonds D. …

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Carbohydrate – Section 2

1. Patients suffering from Von Gierke’s disease are unable to perform gluconeogeneis because they have a defective A. lactate dehydrogenase B. glucose 6 phosphatase C. pyruvate carboxylase D. none of these Answer: Option B 2. The multistep pathways of metabolism are efficient because they A. locate all of the enzymes …

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Carbohydrate – Section 1

1. Fructose is metabolized by A. fructose 1-phosphate pathway B. fructose 6-phosphate pathway C. glyceraldehyde 3-phosphate pathway D. both (a) and (b) Answer: Option D 2. A common way that cells capture the energy released during the breakdown of large molecules is to add electrons to smaller, specialized molecules that …

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