water

Question 1

explain five properties that make water important for organisms.

Answer 1

1) metabolite in condensation + hydrolysis reactions
2) high specific heat capacity : acts as a buffer for sudden temperature change
3) strong cohesion: so produces surface tension supporting small organisms.
4) cohesion: allows water to pass through the xylem as ‘ transpiration stream’.

Question 2

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

Answer 2

property: high specific heat capacity

explanation: buffer changes in temperature

Question 3

Water and inorganic ions have important biological functions within the cells

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

Answer 3

property 1 : polar molecule
Biological importance within cells: acts as a universal solvent

Property 2 : Reactive
Biological importance within cells: takes place in condensation reaction

Question 4

describe the roles of iron ions, sodium ions, and phosphate ions in cells.

Answer 4

Iron ions:
Haemoglobin binds to the oxygen