Biology End Of Year Y8 Flashcards
What substances are made during aerobic respiration?
Carbon dioxide and water
glucose+oxygen->
carbon dioxide+water
What is a carbon dioxide in terms of respiration?
A waste product
Why can’t all the energy be released from glucose molecules in anaerobic respiration?
Because the oxidation is incomplete
What is oxidation?
A chemical reaction that involves a substance coming into contact with oxygen
What are the 5 food groups?
Fruit and veg, carbohydrates, proteins, dairy, lipids
What do fruit and veg provide our bodies?
Vitamins and fibre
What do carbohydrates provide our bodies?
Slow-release energy
What do proteins provide our bodies?
Growth, bone repair and muscle building
What does diary provide our bodies?
Calcium
Why do we need calcium from dairy?
To strengthen teeth and bones
Why do we need lipids?
To store energy
As well as a healthy diet, what else do we need?
Water and exercise
What do we need to add to food to test for starch?
Iodine
What will happen if a test for starch is positive?
It will go blue/black
What do we need to do to test for glucose?
Add a few drops of Benedict’s and then put the test tube in a hot water bath for 5 minutes
What will happen if a test for glucose is positive?
It will go green to orange to brick red precipitate
What do we need to do to test for protein?
Add a few drops of Biruet working solution
What will happen if a test for protein is positive?
It will go purple
What do we need to do to test for lipids?
Add 2cm cubed of ethanol and shake, add 2cm cubed of water and shake again and allow to settle