Biology 2 core practical

Question 1

What is the osmosis practical

Answer 1

Take samples of potatoe same diameter
set up 3 different concentrations
Weigh mass
Use distilled water , surgery Water , more surgry water
10ml
Measure the length and mass
Calaculate difference

Question 2

Practical for photosynthesis

Answer 2

+ water = oxygen + gluscose
Investigate have factored affect photosynthesis
Use a plant eg pondweed
Pop into boiling tube as sodium hydrate carbon solution to photosynthesis
Cut the stem in water
Count number of bubbles of oxygenI’n 1 min

Question 3

What is respiration practical

Answer 3

Put soda lime at the bottom of tube
Add cotton wool ad organisms to tube
Place into water ball wait for 5 mins to adjust
Pour colour liquid into beaker
Place capillary tube into beaker
Mark postiom
Time
Mark after and distance travelled
Repeat a different temperatures

Question 4

What is Enzyme practical

Answer 4

Take starch solution , buffer slloitiom and the enzyme place separately in tube place in water bath
Measure temp
Get spotting panned
Add iodine
Transfer soloutiom into one test tube
Enzyme will starch digesting starch
Every ten seconds add soloutiom to idioms till there is no longer starch