Biomolecules GRBPradip BhattaAugust 18, 2026 Welcome to your Biomolecules GRB Name Email 1. Identify the basic amino acid from the following. Tyrosine Glutamic Acid Lysine Valine None 2. The two functional groups characteristic of sugars are hydroxyl and methyl carbonyl and methyl carbonyl and phosphate carbonyl and hydroxyl. None 3. A typical fat molecule is made up of one glycerol and one fatty acid molecule three glycerol and three fatty acid molecules three glycerol molecules and one fatty acid molecule one glycerol and three fatty acid molecules. None 4. A phosphoglyceride is always made up of a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached a saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. None 5. Uridine, present only in RNA is a nucleoside nucleotide purine pyrimidine. None 6. Which one of the following biomolecules is correctly characterized? Lecithin-a phosphorylated glyceride found in cell membrane. Palmitic acid - an unsaturated fatty acid with 18 carbon atoms. Adenylic acid - adenosine with a glucose phosphate molecule. Alanine amino acid - contains an amino group and an acidic group anywhere in the molecule. None 7. About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and sulphur and magnesium magnesium and sodium calcium and phosphorus phosphorus and sulphur. None 8. Which of the following is the simplest amino acid? Alanine Asparagine Glycine Tyrosine None 9. The major role of minor elements inside living organisms is to act as co-factors of enzymes building blocks of important amino acids constituent of hormones binder of cell structur None 10. Lipids are insoluble in water because lipid molecules are hydrophilic hydrophobic neutral zwitter ions. None 11. Spoilage of oil can be detected by which fatty acid? Oleic acid Linolenic acid Linoleic acid Erucic acid. None 12. Essential amino acid is phenylalanine glycine aspartic acid serine None 13. What are the most diverse molecules in the cell? Lipids Minerals Proteins Carbohydrates None 14. The four elements that make up 99% of all elements found in a living system are C, H, O and P C, N, O and P H, O, C and N C, H, O and S. None 15. Amino acids are mostly synthesised from mineral salts fatty acids volatile acids α-ketoglutaric acid. None 16. Living cell contains 60 – 95% water. Water present in human body is 60 – 65% 50 – 55% 75 – 80% 65 – 70%. None 17. Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their nutritive value growth response defence action effect on reproduction. None 18. Concanavalin A is a pigment an alkaloid an essential oil a lectin. None 19. Which one of the following is the most abundant protein in the animals? Haemoglobin Collagen Lectin Insulin None 20. Which of the following glucose transporters is insulin-dependent? GLUT IV GLUT I GLUT II GLUT III None 21. Which one is the most abundant protein in the animal world? Trypsin Haemoglobin Collagen Insulin None 22. Which of the following have carbohydrate as prosthetic group? Glycoprotein Chromoprotein Lipoprotein Nucleoprotein None 23. Which one of the following statements is wrong? Uracil is a pyrimidine. Glycine is a sulphur containing amino acid. Sucrose is a disaccharide. Cellulose is a polysaccharide. None 24. The chitinous exoskeleton of arthropods is formed by the polymerisation of N - acetyl glucosamine lipoglycans keratin sulphate and chondroitin sulphate D - glucosamine. None 25. Which one of the following is a non - reducing carbohydrate? Maltose Sucrose Lactose Ribose 5-phosphate None 26. Macromolecule chitin is sulphur containing polysaccharide simple polysaccharide nitrogen containing polysaccharide phosphorus containing polysaccharide. None 27. Cellulose is the major component of cell walls of Pseudomonas Saccharomyces Pythium Xanthomonas None 28. Carbohydrates, the most abundant biomolecule on earth, are produced by some bacteria, algae and green plant cells fungi, algae and green plant cells all bacteria, fungi and algae viruses, fungi and bacteria. None 29. Which of the following is a reducing sugar? Galactose Gluconic acid β-methyl galactoside Sucrose None 30. Cellulose the most important constituent of plant cell walls is made up of branched chain of glucose molecules linked by β-1, 4 glycosidic bond in straight chain and α-1, 6 glycosidic bond at the site of branching unbranched chain of glucose molecules linked by β-1, 4 glycosidic bond branched chain of glucose molecules linked by α-1, 6 glycosidic bond at the site of branching unbranched chain of glucose molecules linked by α-1, 4 glycosidic bond. None
