Biology Fsc Part 1 Online Test With Answers

Biology Fsc Part 1 Online Test

Sr. # Questions Answers Choice
1 Glucose and galactose have a difference in the orientation of one OH grop at. C3 C4 C5 C6
2 The primary energy sgrogage molecule is glucose, and the numebr of CH-bonds in it are 6 6 7 4
3 Which one of the following is NOT a hexose. Glucose Fructose Erythrose Galactose
4 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
5 Ice floating protects aquatic ecosystems by  Forming a insulating layer that traps heat Making compartments in sea Reflecting sunlight Evaporation prevention 
6 Water exhibits its maximum density at. 4 oC 0 oC 100 oC -100 oC
7 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
8 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
9 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
10 The specific het of vaporization of water is. 570 Kcal/kg 374cal /moles 574 Kcal/kg 717.6 kcal/gram
11 Water's high heat capacity benefits livng tissues by Provinding protection against sudden thermal changes Preventing ionization  Making emollient sensation Providing cooling effect
12 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 
13 Which one of the following is not a hydrophilic molecule. Sugars Lipids Salts Amino acids
14 The concentrtion of water in differente organisms, varies from 65 to 89% 40- 89% 80- 90% 50- 60%
15 Breakdown of maltose into two glucose monomers by the sddition of water molecules in an example of. Hydrolysis Condensation  Dehydration synthesis Redox reaction
16 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 
17 The bond which helps in maintationg the structur eof large molecules the proteins, nucleic acids, as well as DNA replication is. Hyrrophobic interaction  Hydrogen bond Hydrophilic interaction  Ionic bond
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