11th class (FSc) Biology Unit 2 MCQs
26. The specific heat of vaporization of water is:
a. 547 kcal/kg
b. 457 kcal/kg
c. 475 kcal/kg
d. 574 kcal/kg
27. Human tissues have 85% water in cells of:
a. Blood
b. Brain
c. Liver
d. Bone
28. Carbon is:
a. Monovalent
b. Divalent
c. Tetravalent
d. Trivalent
29. The amount of heat absorbed by a liquid when it changes into gas is called:
a. Specific heat
b. Heat capacity
c. Absorbed heat
d. Heat of vaporization
30. Water is an excellent solvent for polar substances due to its:
a. Solidarity
b. Molarity
c. Polarity
d. Normality
31. Nonpolar organic molecules, such as fats, are insoluble in:
a. Benzene
b. Alcohol
c. Chloroform
d. Water
32. The number of calories required to raise the temperature of 1g of water by 10C from 15 to 160C is called:
a. Specific gravity
b. Specific heat capacity
c. Specific aqueous capacity
d. Specific heat absorption
33. The specific heat capacity of water is:
a. 4
b. 2
c. 3
d. 1
34. Evaporation of only two mi out of one litre of water, lowers the temperature of the remaining 998 ml by:
a. 30C
b. 10C
c. 40C
d. 20C
35. At 250C the concentration of each of H and OH ions in pure water is about:
a. 10-7mole/litre
b. 6-7mole/litre
c. 12-7mole/litre
d. 8-7mole/litre
36. Almost all the reactions of a cell occur in the presence of
a. Alcohol
b. Coenzymes
c. Proteins
d. Water
37. In different organisms, water varies from:
a. 40 to 80%
b. 55 to 79 %
c. 56 to 66 %
d. 65 to 89 %
38. The specific heat of vaporization of water is ………Kcal/kg.
a. 574
b. 374
c. 674
d. 474
39. Human tissues have 85 percent water in:
a. Bladder cells
b. Human tissues have85 percent water in:
c. Brain cells
d. Blood cells
40. The most abundant compound in all organisms:
a. Water
b. Proteins
c. Nucleic acids
d. Lipids
41. Human tissues have 20 percent water in:
a. Kidney cells
b. Brain cells
c. Bone cells
d. Blood cells
42. The bond formed between two Monosaccharide to form oligosaccharide is:
a. Glycosidic bond
b. H-bond
c. C-C bond
d. Peptide bond
43. Dextrin, Agar , pectin and Chitin are:
a. Protein
b. Carbohydrate
c. Nucleic Acid
d. Lipid
44. Substances, which on hydrolysis, yield polyhydroxy aldehyde or ketone sub-units:
a. Carbohydrates
b. Acylgyeerol
c. Nucleic acids
d. Polypeptides
45. The amount of solar energy required to synthesize the 10gm of glucose during photosynthesis is:
a. 716.6 k cal
b. 717.6 k cal
c. 816.6 k cal
d. 817.6 k cal
46. Most abundant carbohydrate in nature is:
a. Cellulose
b. Starch
c. Agar
d. Glycogen
47. Glycogen gives colour with iodine:
a. Blue
b. Black
c. Green
d. Red
48. Which one of the following is not a polysaccharide?
a. Starch
b. Glycogen
c. Dextrin
d. Lactose
49. Starch with iodine give color:
a. Green
b. Blue
c. Yellow
d. Red
50. In free state, glucose is present in:
a. Glycogen
b. Dates
c. Cellulose
d. Amylose