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Biology · BIOMOLECULES
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Biology · BIOMOLECULES
Match List-I with List-II: List-I (Protein) List-II (Function/Characteristic) A Collagen I Enables glucose transport into cells B GLUT-4 II Sensory reception (smell, taste, hormone) C Antibody III Intercellular ground substance D Receptor IV Fights infectious agents Choose the correct answer from the options given below:
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Consider the structural formulas of palmitic acid and arachidonic acid. Which of the following statements regarding the carbon counts in these fatty acids is correct?
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During chemical analysis of living tissue, which of the following features explains why lipids are recovered in the macromolecular (acid-insoluble) fraction despite having molecular weights not exceeding 800 Da?
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A comparative elemental analysis of non-living matter (Earth's crust) and living matter (Human body) reveals distinct percentage abundances by weight. Which of the following elements exhibits a percentage weight of approximately 27.7% in the Earth's crust but is virtually negligible in the human body?
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Refer to the given potential energy profile diagram for an enzyme-catalysed reaction. Which of the following statements is correct regarding this reaction coordinate?
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Given below are two statements: Statement I: Inorganic catalysts work efficiently at high temperatures and high pressures, whereas most enzymes get damaged at temperatures above 40°C. Statement II: Enzymes isolated from thermophilic organisms living in hot vents retain their catalytic activity even at temperatures up to 80°-90°C. In the light of the above statements, choose the most appropriate answer from the options given below:
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Which of the following compounds is a nucleotide, and how does it structurally differ from a nucleoside?
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What is 'activation energy' in the context of an enzymatic reaction?
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Adult human haemoglobin (Hb) exhibits a quaternary protein architecture. Which of the following statements correctly describes its subunit composition?
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Why do lipids, despite having a molecular weight that does not exceed 800 Da, appear in the acid-insoluble fraction during tissue fractionation?
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A general rule of thumb states that the rate of a physical or chemical process changes with temperature. If the temperature of an enzymatic reaction occurring at 25 °C is raised to 35 °C (below the denaturation threshold), the rate of the reaction will:
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Consider the following statements regarding amino acids and lipids: (A) Tyrosine, phenylalanine, and tryptophan are aromatic amino acids. (B) Glutamic acid is an acidic amino acid, whereas valine is a neutral amino acid. (C) Arachidonic acid possesses 16 carbon atoms including the carboxyl carbon. (D) Lecithin is a phospholipid found in cell membranes and possesses a choline group. (E) Oils have higher melting points than fats and solidify easily in winter. Which of the above statements are correct?
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Adult human hemoglobin (Hb) molecule exhibits which level of protein structural organization, and what is its specific subunit composition?
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Which of the following correctly pairs an amino acid with the exact chemical nature of its substituent 'R' group as described in living systems?
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Consider the structural formulas of palmitic acid and arachidonic acid. What is the total number of carbon atoms present in palmitic acid and arachidonic acid, respectively, including the carboxyl carbons?
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In the reaction: \( \text{CO}_2 + \text{H}_2\text{O} \xrightarrow{\text{Carbonic anhydrase}} \text{H}_2\text{CO}_3 \), how many molecules of \( \text{H}_2\text{CO}_3 \) are produced per second in the presence of the enzyme compared to uncatalyzed conditions?
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Given below are two statements: Statement I: Primary metabolites have identifiable functions and play known roles in normal physiological processes of the host organism. Statement II: All secondary metabolites are strictly waste products with no ecological importance or utility to humans. In the light of the above statements, choose the most appropriate answer from the options given below:
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Consider the following statements regarding amino acids: (A) Amino acids are organic compounds containing an amino group and an acidic group on the same \( \alpha \)-carbon. (B) The R group in serine is a methyl group, while in alanine it is a hydroxy methyl group. (C) Tyrosine, phenylalanine, and tryptophan are aromatic amino acids. (D) In solutions of different pH, the structure of an amino acid changes, and at a particular pH it exists as a zwitterion with zero net charge. Which of the above statements are correct?
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