Biology Fsc Part 1 Chapter 4 Online Test With Answers

Biology Fsc Part 1 Chapter 4 Online Test

Sr. # Questions Answers Choice
1 Which of the followign hexoses show stereoisomerism. Glucose and galactose Fructose and galactose Glucose and fructose All of the above
2 Glucose and galactose have a difference in the orientation of one OH grop at. C3 C4 C5 C6
3 The primary energy sgrogage molecule is glucose, and the numebr of CH-bonds in it are 6 6 7 4
4 Which one of the following is NOT a hexose. Glucose Fructose Erythrose Galactose
5 During photosynthesis, when reducton of CO2 occurs, the resulting sugar molecule contains carbon, hydrogen and oxygen in molar ratio. 1:2:1 1:4:1 2:1:2 3:6:8
6 Ice floating protects aquatic ecosystems by  Forming a insulating layer that traps heat Making compartments in sea Reflecting sunlight Evaporation prevention 
7 Water exhibits its maximum density at. 4 oC 0 oC 100 oC -100 oC
8 At rooom temperatue  in a litre of water,out of 550 million water molecules, only..........gets ionized. 100 molecules 10,000 molecules 550 million moleclules Only 1 molecule
9 Surface tension allows water strides to walk on water due to. High specific heat capcity Plarity of water moleclues Cohesive force between water molecules all of the above
10 Evaporation of 2 ml of water out of  1 litre lower the temperature of remaining 998 ml water by  1 oC 2 oC 3 oC 4 oC
11 The specific het of vaporization of water is. 570 Kcal/kg 374cal /moles 574 Kcal/kg 717.6 kcal/gram
12 Water's high heat capacity benefits livng tissues by Provinding protection against sudden thermal changes Preventing ionization  Making emollient sensation Providing cooling effect
13 When oil is dropped into water , oil is ecluded from water forming strong associations among themeslees,this phenomenon is called. Hydrophobic exclusion  Hydrophobic interaction  Hydrogen bonding Hydrophilic interaction 
14 Which one of the following is not a hydrophilic molecule. Sugars Lipids Salts Amino acids
15 The concentrtion of water in differente organisms, varies from 65 to 89% 40- 89% 80- 90% 50- 60%
16 Breakdown of maltose into two glucose monomers by the sddition of water molecules in an example of. Hydrolysis Condensation  Dehydration synthesis Redox reaction
17 Non -polar molecules tend to cluster together in aqueous environments to minimize contact with water molecules. This phenomenon is termed as. Hydrophobic internation  Hydrogen bonding Hydrophiclic interaction  Condensation 
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