4.1.3 Uses of glucose from photosynthesis

Question 1

Uses of glucose: (5p)

Answer 1

• used for respiration
• converted into insoluble starch for storage
• used to produce fat or oil for storage
• used to produce cellulose, which strengthens the cell wall
• used to produce amino acids for protein synthesis

Question 2

How does glucose create proteins? (2p)

Answer 2

• Use nitrate ions to make amino acids
• Glucose is broken down by respiration and the energy released is used for protein synthesis

Question 3

Where is starch stored? (3p)

Answer 3

• Roots
• Stems
• Leaves: for overnight respiration

Question 4

Why does glucose need to be stored as starch for storage? (2p)

Answer 4

• because starch is insoluble in water, while glucose is soluble
• prevent osmosis occurring into the cell, causing it to burst

Question 5

How are lipids used in plants (2p)

Answer 5

• To make cell membrane
• Stores fats in seeds