Title Biological Molecules.pdf ✅

Note: Humans learn from Mistakes - If you find any error in Key , Must Whatsapp us that MCQs - We,ll make Correction Topic: Bio Elements 1. Second most abundant bio element in human body is: (SZABMU-2023 by Medix) A. Oxygen B. Carbon C. Hydrogen D. Nitrogen --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: B Explanation: (Ftb 1st year pg#31 table) Topic: Acylglycerol 2. Three hydrophobic fatty acid tails and a glycerol molecule join to form a: (SZABMU-2023 by Medix) A. Monoglyceride B. Diglyceride C. Triglyceride D. Phospholipid --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- UHS - SZABMU PAST PAPERS 2008-2023 Join us - Whatsapp 0326-5590305 www.medixprep.com FREE MDCAT - NUMS - AFNS - AMC - PMA -PAF - Nursing Preparation BIOLOGY
Answer: C Explanation: (1st year ptb pg#24) Topic: Riboneucleic Acid 3. The sugar which is part of ribonucleic acid is: (SZABMU-2023 by Medix) A. Ribulose B. Ribose C. Deoxyribulose D. Deoxyribose --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: B Explanation: (Pg#49 ftb 1st year) Topic: Uses of Protein 4. Select the protein providing support for the connective tissues: (SZABMU-2023 by Medix) A. Histones B. Elastin C. Keratin D. Collagen --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: B Explanation: (Ftb 1st year pg#45) Topic: Uses of Fibrous Protein 5. Fibrous proteins 'DO NOT' take part in: (SZABMU-2023 by Medix) A. Blood clotting B. Formation of nails C. Muscle contraction D. Oxygen transport in blood --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: D Explanation: Oxygen transport is done by hemoglobin, which is a globular, not fibrous, protein (1st year ptb pg#30).
Topic: Classification of Proteins 6. Select an example of fibrous protein: (SZABMU-2022 by Medix) A. Enzymes B. Collagen C. Hemoglobin D. Hormones --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: B Explanation: Fibrous proteins are involved in maintaining structures. A, C, and D are all functional, globular proteins while collagen is structural, fibrous protein. Topic: Proteins 7. Which function is not performed by proteins? (SZABMU-2022 by Medix) A. Providing structural support to cells B. Catalyzing biochemical reactions C. Transporting material across membranes D. Providing insulation against heat loss --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: D Explanation: A, B, and C are functions of proteins, while D is not. Topic: Lipids 8. Three hydrophobic fatty acid tails and a glycerol molecule join to form a: (SZABMU-2022 by Medix) A. Monoglyceride B. Diglyceride C. Triglyceride D. Phospholipid --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: C Explanation: When three fatty acids form an ester bond with a glycerol molecule, triglyceride is formed. Topic: Lipids 9. Which bond is the potential source of energy for cellular activities? (SZABMU-2022 by Medix)
A. C=O B. C—H C. C—R D. C—N --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: B Explanation: Lipids are a great source of energy due to the abundance of C—H bonds. Topic: Properties of Water 10. Which property of water enables it to act as a temperature stabilizer in living organisms? (SZABMU-2022 by Medix) A. High Polarity B. Being non-polar C. High specific heat capacity D. High heat of vaporization --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: C Explanation: Water has a very high specific heat capacity, meaning it can absorb large amounts of heat with little temperature change, helping to stabilize temperature in living organisms. Topic: Carbohydrates 11. Which of the following carbohydrates is the most sweet among all? (SZABMU-2022 by Medix) A. Monosaccharides B. Disaccharides C. Oligosaccharides D. Polysaccharides --- ✶★✶ --- Medix ♥ A.R --- ✶★✶ --- Answer: A Explanation: Monosaccharides are the sweetest and the simplest sugars. Topic: Conjugated Molecules 12. Competitive inhibitors are: (UHS-2023 by Medix) A. Homologous to substrate