Biomolecules MCQs Mock Test of Class 12th Chemistry

Question 1. Which compound can exist in a dipolar (zwitter ion) structure?

Question 2. Which of the following is an acidic amino acid?

Question 3. The melting points of amino acids are higher than the corresponding hal-acids because

Question 4. Most common types of secondary structures of proteins are

Question 5. Mark the incorrect example

Question 6. During acetylation of glucose it needs ,v moles of.acetic anhydride. The value of x would be

Question 7. On oxidation with a mild oxidising agent like Br2/H20, the glucose is oxidized to

Question 8. Invert sugar is

Question 9. Which of the following compounds is found abundatly in nature?

Question 10. Glycosidic linkage is an

Question 11. Starch is composed of two polysaccharides which arc

Question 12. Which reagent is used to convert glucose into saccharic acid?

Question 13. Maltose is made up of

Question 14. What is the basic formulae for starch?

Question 15. Whicn of the following is an example of an aldopentose?

Question 16. Which of the following treatment will convert starch directly into glucose?

Question 17. The general formula of carbohydrates is

Question 18. The a-and p-forms of glucose are

Question 19. The conversion of maltose into glucose is possible by the enzyme

Question 20. Which of the following is a non-reducing sugar?

Question 21. Which one of the following is not correct?

Question 22. In cellulose, D-glucose units are joined by

Question 23. The anomeric carbon in D (+) glucose is

Question 24. How many C-atoms are there is a pyranose ring?

Question 25. Cellulose is a

Question 26. Amino acids generally exist in the form of Z witter ions. This means they contain

Question 27. Globular proteins are present in

Question 28. The letter ‘D’ in carbohydrates signifies

Question 29. A diabetic person carries a packet of glucose with him always, because

Question 30. Among the naturally occurring carbohydrates, furanose ring is found in the

Question 31. Which one of the amino acids can be synthesised in the body?

Question 32. Which of the following is not true about amino acids?

Question 33. A compound which contains both ………… and ………… is called amino acid. The amino acids is polypeptide chain are joined by ………/ bonds.

Question 34. Denaturation of protein leads to loss of its biological activity by

Question 35. Proteins are condensation polymers of

Question 36. Mark the wrong statement about denaturation of proteins

Question 37. In fibrous proteins, polypeptide chains are held together

Question 38. Which type of interactions are responsible for making the a-helix structure stable?

Question 39. Secondary structure of protein refers to

Question 40. What are the hydrolysis products of sucrose?

Question 41. Carbohydrates are stored in human body as the polysaccharide

Question 42. The glycosidic linkage involved in linking the glucose units in amylose part of starch is

Question 43. Which of the following B group vitamins can be stored in our body?

Question 44. Which of the following bases is not present in DNA?

Question 45. Which of the following reactions of glucose can be explained only by its cyclic structure?

Question 46. Glycogen is a branched chain polymer of α-D-glucose units in which chain is formed by C1—C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to _____________________ .

Question 47. Which of the following polymer is stored in the liver of animals?

Question 48. Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives

Question 49. Proteins are found to have two different types of secondary structures viz. α-helix and β-pleated sheet structure. α-helix structure of protein is stabilised by:

Question 50. Which of the following acids is a vitamin?