T1: Water

Question 1

state and explain the property of water that helps to prevent temperature increase in a cell

Answer 1

high specific heat capacity buffers changes in temperature

Question 2

give and explain two properties of water that are important in the cytoplasm of cells

Answer 2

polar molecule SO acts a solvent
reactive, takes part in condensation and hydrolysis
solvent, metabolic reactions occur faster in solution

Question 3

explain the 6 properties of water

Answer 3

metabolite in many reactions e:g condensation, hydrolysis, photosynthesis and respiration

it is a solvent, the cytoplasm is 70-95% water

has a high heat capacity SO acts as a thermal buffer, requires lots of energy to change the temperature by 1C

strong cohesion between water molecules SO supports columns of water in plants

has a large latent heat of vaporisation SO provides a cooling effect through evaporation