Atp

Question 1

(b) Give two ways in which the hydrolysis of ATP is used in cells.

Answer 1

To provide energy for other reactions/named process;

2. To add phosphate to other substances and make them more reactive/change their shapes

Question 2

Cells constantly hydrolyse ATP to provide energy.
(a) Describe how ATP is resynthesised in cells.

Answer 2

From ADP and phosphate;

By ATP synthase;
During respiration/photosynthesis;

Question 3

ATP is an energy source used in many cell processes. Give two ways in which ATP is a suitable energy source for cells to use.

Answer 3

Releases relatively small amount of energy / little energy lost as heat;
(Key concept is that little danger of thermal death of cells)
Releases energy instantaneously;

Phosphorylates other compounds, making them more reactive;
Can be rapidly re-synthesised;
Is not lost from / does not leave cells.

Question 4

Describe how an ATP molecule is formed from its component molecules.

Answer 4

. adenine, ribose, three phosphates;;

3. Condensation (reaction);
   Ignore phosphodiester
4. ATP synthase;

Question 5

water is used to hydrolyse ATP.
Name the two products of ATP hydrolysis.

Answer 5

Adenosine diphosphate
And pi / phosphate