GCSE Photosynthesis - starch testing

What DON'T plants use glucose for?

• making cellulose

• respiration

• making amino acids

• photosynthesis

• making cellulose

What colour does iodine go if starch is present

• orange

• purple

• black

• red

What do you boil the leaf in to kill it and remove the waxy cuticle?

• water

• ethanol

• water + sodium hydrogen carbonate

• chlorophyll

What do you boil the leaf in to remove the chlorophyll?

• water

• ethanol

• water + sodium hydrogen carbonate

• chlorophyll

Which areas of the leaf should go black with iodine?

• green bits

• white bits

• both

• neither

Why must you turn off the bunsen burner before getting the ethanol?

• because ethanol boils at a higher temperature than water

• because ethanol boils at a lower temperature than water

• because ethanol is flammable

• because ethanol is corrosive

what is required for photosynthesis?

• light, oxygen and chlorophyll

• light, chlorophyll and heat

• chlorophyll, light and the correct temperature

• chlorophyll, the correct temperature and oxygen

When you light the bunsen burner, you should have

• the hole open

• the hole closed

What are the reactants in photosynthesis?

• oxygen & water

• Oxygen & carbon dioxide

• carbon dioxide & water

• water & glucose

What temperature does photosynthesis occur fastest at?

• 20

• 25

• 30

• 37