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Biology MCQ Question - Biological Molecules

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1. Which bond provides stability to complex carbohydrate molecules?




2. % of water in brain cells is




3. Which statement is true about an aqueous medium:




4. Which of the following substance is most favorable to form structural component of biological membranes?




5. The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called?




6. The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is:




7. Specific heat of vaporization of water is:




8. A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called:




9. Cn(H2O)n. is a general formula of :




10. Which of the statement is not true for compounds like glycoprotein and glycolipids?




11. Which one are most complex sugar:




12. Which of the following carbohydrate is tasteless?




13. Which of the following carbohydrate can not be hydrolysed?




14. Ribose is an example of




15. % of Glucose normally present in our blood is




16. Starch cellulose and glaycogen yield ________ on complete hydrolysis.




17. For the synthesis of 10g of glucose ______ of energy is required:




18. Which one is abundant in animals?




19. Which one is soluble in hot water?




20. The covalent bond between two monosaccharide subunits is called:




21. Which one gives blue colour with iodine?




22. Which of the following polysaccharide is called animal starch?




23. _________ is example of pure form of cellulose




24. Lipids are soluble in which of the following :




25. Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of




26. A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called:




27. Fatty acids containing 18 C atoms and a single double bond is




28. Which one the following fatty acid is more soluble in an organic solvent and has higher melting point?




29. Which of the following statement is incorrect5 for fats containing unsaturated fatty acid?




30. Animals obtain carbohydrates mainly from




31. Peptide bond is:




32. Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbodydrates (iii) proteins (iv) DNA




33. Proteins comprise of _____% of the total dry weight of a cell.




34. Proteins are polymers of




35. The element in basic structure of proteins which differentiate them from carbohydrates is




36. Total number of amino acids discovered so far in cells and tissues are




37. In Glycin an amino acid R group is replaced by




38. A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called




39. Total number of amino acids in a hemoglobin molecule are:




40. An insulin molecule consists of _____ polypeptide chains.




41. Which structure of protein gives information aboutnumber and sequence of amino acids in it?




42. In an aqueous environment the most stable tertiary conformation is that in which ______ amino acids are buried inside the conformation.




43. Hemoglobin molecule exhibits which structural organization of proteins




44. ?- helical structure is kept by the formation of _____ bonds among amino acids molecules.




45. Which of the following does not show quaternary structure?




46. Which structural organization is most common in globular proteins?




47. Actin and myosin are the basic proteins involved in contractile machinery of our body to which type of proteins do they belong?




48. Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong?




49. ATP is a an important molecule for its major function




50. Each turn of DNA contain _______ nitrogenous base pairs