Tiêu đề 14.BIOMOLECULES.pdf ✅

User Restrictions: Not authorized to transfer to any third party, Not authorized to go for any resale of this document without permission. Document is protected from being unauthorized use, for any help please contact Mr. SEKHAR , +919206306398. We are not responsible for lose of data while deprotecting the document without any permission from author. Use only for question paper preparation, worksheet preparation... 14.BIOMOLECULES Single Correct Answer Type 1. Which of the following is ketohexose? a) Glucose b) Sucrose c) Fructose d) Ribose 2. Experimental material in the study of DNA replication has been a) Escherichia coli b) Drosophila melanogaster c) Pneumococcus d) Neurospora crassa 3. Which one of the following statements is true? a) Saponification of oil yields a diol b) Drying of oil involves hydrolysis c) Addition of antioxidant to oil minimizes rancidity d) Refining of oil involves hydrogenation 4. Which of the following is not a function of proteins? a) Nail formation b) Skin formation c) Muscle formation d) Providing energy for metabolism 5. Which enzyme convert glucose into alcohol? a) Invertase b) Zymase c) Maltase d) Diastase 6. The charring of sugar when it is treated with conc. H2SO4 is due to a) Oxidation b) Reduction c) Dehydration d) Hydrolysis 7. The sweetest carbohydrate is a) Sucrose b) Glucose c) Fructose d) Lactose 8. Which set of terms correctly identifies the carbohydrate shown? 1. Pentose 2. Hexose 3. Aldose 4. Ketose 5. Pyranose a) 1, 3 and 6 b) 1, 3 and 5 c) 2, 3 and 5 d) 2, 3 and 6 9. Glucose is a/an a) Polyhydroxy ketone b) Alcohol c) Hydrate of carbon d) Pentahydroxy aldehyde 10. All monosaccharides .............. Tollen’s reagent. a) Oxidises b) Condense with c) Reduces d) Add to 11. A compound gives negative test with ninhydrin and positive test with Benedict’s solution. The compound is

User Restrictions: Not authorized to transfer to any third party, Not authorized to go for any resale of this document without permission. Document is protected from being unauthorized use, for any help please contact Mr. SEKHAR , +919206306398. We are not responsible for lose of data while deprotecting the document without any permission from author. Use only for question paper preparation, worksheet preparation... a) A coenzyme b) A hormone c) An enzyme d) An antibiotic 26. Pick out the one which does not belong to the family a) Pepsin b) Cellulose c) Ptyalin d) lipase 27. Which of the following biomolecules contain non-transition metal ion? a) Vitamin B12 b) Chlorophyll c) Haemoglobin d) Insulin 28. The correct statement in respect of protein haemoglobin is that it a) Acts as an oxygen carrier in the blood b) Forms antibodies and offers resistance to diseases c) Function as a catalyst for biological reactions d) Maintains blood sugar level 29. Which of the following doesn’t form an oxime? a) Glucose b) Glucose pentaacetate c) Arabinose d) Galactose 30. If α-D-glucopyranose is reacted with acetic anhydride at 373 K, the major products is the β- isomer of the pentaacetate. It is attributed to a) Isomerisation of α-D into β-D-glucose at 373 K b) Opening of glucopyranose ring c) Both the statements are correct d) None of the statement is correct 31. The nucleic acid base having two possible binding sites is a) Thymine b) Cytocine c) Guanine d) Adenine 32. A tripeptide is composed equally of L-valine, L-tryosine and L-alanine (one molecule of each). How many isomeric tripeptide of this kind may exist? a) 3 b) 4 c) 6 d) 8 33. Iso-electric is a a) Specific temperature b) Suitable concentration of amino acid c) Hydrogen ion concentration that does not allow migration of amino acid under electric field d) Melting point of an amino acid under the influence of electric field 34. Which of the following set consists only of essential amino acids? a) Alanine, tyrosine, cystine b) Leucine, lysine, tryptophane c) Alanine , glutamine, lycine d) Leucine, proline, glycine 35. An organic compound consumes 4 moles of periodic acid to form following compounds, per mole of the starting compounds HCHO, 3HCOOH and CHOCOOH. The organic compound is a) Glucose b) Fructose c) Gluconic acid d) Sorbitol 36. The vector for genetic code is called a) Messenger RNA b) Transfer RNA c) Ribosomal RNA d) Viral DNA 37. Polypeptides having, molecular weights, above 10000 are known as a) Amino acids b) Hormones c) Proteins d) Terminal amino acids 38. The process used in conversion of triolein to tristearin is a) Hrdrolysis b) Hydration c) Hydrogenation d) Dehydrogenation 39. The best source of vitamin A is
User Restrictions: Not authorized to transfer to any third party, Not authorized to go for any resale of this document without permission. Document is protected from being unauthorized use, for any help please contact Mr. SEKHAR , +919206306398. We are not responsible for lose of data while deprotecting the document without any permission from author. Use only for question paper preparation, worksheet preparation... a) Wheat b) Beans c) Carrots d) Oranges 40. A diabetic person carries a packet of glucose with him always because a) Glucose reduces the blood sugar level slowly b) Glucose increases the blood sugar level slowly c) Glucose reduces the blood sugar level d) Glucose increases the blood sugar level almost- instantaneously. 41. The total number of basic groups in the following form of lysine is a) 1 b) 2 c) 3 d) 4 42. An example of a protein which acts as a hormone is a) Casein b) Oxytocin c) Trypsin d) Keratin 43. Which one of the following structure represents the peptide chain? a) b) c) d) 44. In an alkaline medium, Glycine predominantly exists as/in a/an a) Cation b) Anion c) Zwitter ion d) Covalent form 45. The secondary structure of a protein refers to a) α −helical backbone b) Hydrophobic interaction c) Sequence of α −amino acids d) Fixed configuration of the polypeptide backbone 46. When glucose reacts with bromine water the main product is a) Acetic acid b) Saccharic acid c) Glyceraldehydes d) Gluconic acid 47. The α −amino acid which doesn’t give purple colour in the ninhydrin test is a) Proline b) Glycine c) Lysine d) Aspartic acid 48. If one strand of DNA has the sequence ATCGTATG, the sequence in the complementary strand would be a) TAGCTTAC b) TCACATAC c) TAGCATAC d) TACGATAC 49. Which of the following statement (s) is/are true? (i) All amino acids contain one chiral centre (ii) Some amino acids contain one, while some contain more chiral centre or even no chiral centre (iii) All amino acids in protein have L-configuration