biological molecules- properties of water

Question 1

liquid

Answer 1

low viscosity- easily flows
provides habitats- seas, lakes
forms major components of tissue of living organisms
provides reaction medium for chemical reactions
provides effective transport medium, in blood

Question 2

density

Answer 2

ice less dense than water
aquatic organisms have stable environment to live during winter
bodies of water well insulated

Question 3

solvent

Answer 3

water is polar
molecules and ions can move around and react together in water
molecules and ions can be transported around living things whilst dissolved in water

Question 4

cohesion and surface tension

Answer 4

water molecules at surface are all hydrogen bonded to molecule beneath them, more attracted to water molecules than air molecules- water contracts and gives water ability to resist force applied to it.
columns of water in plant vascular tissue are pulled up xylem tissue from the root

Question 5

high specific heat capacity

Answer 5

high specific heat capacity
prokaryotes and eukaryotes need stable temperature for enzyme controlled reactions
aquatic organisms need stable environment to live in.