KEY POINTS THAT ARE HARD TO REMEMBER

Question 1

4 functions of proteins?

Answer 1

Structural components of tissue
Hormones
Antibodies
Catalysts

Question 2

3 functions of enzymes?

Answer 2

Build larger molecules from smaller ones e.g. starch from glucose
Break down large molecules into smaller ones e.g. digestion
Turn one molecule into another e.g. turning one sugar into another

Question 3

Enzymes in industry? 4

Answer 3

Protease and amylase used in biological detergents to digest stains
Protease used to pre-digest baby food
Isomerase converts glucose into fructose
Carbohydrates converts starch into syrup for foods

Question 4

Disadvantages of using enzymes in industry?4

Answer 4

People may have allergic reactions
Enzymes may get into sewage systems
Enzymes denature at the high temperatures needed to kill pathogens
Some fabrics can be digested by proteases

Question 5

Energy released in respiration is used for what? 4

Answer 5

Build larger molecules from smaller ones
Enable muscle contraction
Constant body temperature
In plants to turn nutrients into amino acids

Question 6

5 ways plants use glucose?

Answer 6

Converted to starch for storage
Converted to fats and oils for storage
Used in respiration
Used to make proteins
Used to make cell walls

Question 7

Limiting factors for photosynthesis? 3

Answer 7

Shortage of light
Low temp
Shortage of carbon dioxide

Question 8

Digestive system components and their functions? 5

Answer 8

Glands (pancreas and salivary) produce digestive juices
Stomach where digestion occurs
Liver produces bile
Small intestine absorbs soluble food
Large intestine absorbs water from undigested food