milestone last term 9

Question 1

Photosynthesis

Answer 1

A chemical reaction in which plants make their own food (glucose)

Using sunlight absorbed by chloroplasts
Endothermic – takes in energy from the surroundings

Question 2

Uses of glucose

Answer 2

>Respiration – releasing energy
• Converted into starch for storage
• Produce fat or oil for storage
• Produce cellulose cell walls
• Produce amino acids for protein synthesis

Question 3

Light increases photosynthesis because?

Answer 3

More energy for the

reaction

Question 4

Carbon dioxide increases photosynthesis because?

Answer 4

More reactants (provided
there is no limiting reactant)

Question 5

Amount of chlorophyll increases photosynthesis because?

Answer 5

More energy for the

reaction

Question 6

Temperature increases photosynthesis because?

Answer 6

Initially more energy but

then enzyme denatures (higher temperature = higher rate till it gets too hot)

Question 7

Aerobic Respiration physical breathing

Answer 7

A chemical reaction in all living cells all of the time
Releases energy – exothermic reaction
Transfer energy for:
• Chemical reactions
• Movement
• Warmth

Question 8

Anaerobic

Answer 8

Respiring Without oxygen

Releases a lot less energy than aerobic respiration

Question 9

Anaerobic respiration in

muscle cells

Answer 9

glucose → lactic acid

Question 10

Anaerobic respiration in
yeast cells
(fermentation)

Answer 10

glucose → ethanol + carbon dioxide

Used to make bread and alcohol

Question 11

Lactic acid

Answer 11

A chemical that when built up in

muscles causes fatigue

Question 12

Metabolism

Answer 12

The sum of all the reactions in a cell or the
body

Includes: • Conversion of glucose to starch,
glycogen and cellulose
• Formation of lipids from glycerol and 3
fatty acids
• Use of glucose and nitrates to make
proteins (PLANTS)
• Respiration
• Breakdown of protein to form urea.