2.3 Photosynthesis

Question 1

What is the word equation for photosynthesis?

Answer 1

Carbon dioxide + water -> glucose + oxygen

Question 2

What is the balanced symbol equation for photosynthesis?

Answer 2

6CO2 + 6H2O -> C6H12O6 + 6O2

Question 3

How is carbon dioxide obtained to be used in photosynthesis?

Answer 3

It is obtained from the atmosphere via diffusion through the stomata

Question 4

How is water obtained to be used in photosynthesis?

Answer 4

It is obtained from the soil via osmosis through root hair cells

Question 5

What other factor is needed in photosynthesis?

Answer 5

Sunlight

Question 6

What absorbs the sunlight?

Answer 6

The green pigment chlorophyll found in chloroplasts

Question 7

What is glucose stored as?

Answer 7

Insoluble starch or sugar

Question 8

What is glucose used to make and do in a plant?

Answer 8

Proteins
Fats for storage
Cellulose to strengthen the cell wall

Respiration

Question 9

What is the test for photosynthesis?

Answer 9

Use iodine to test for starch

Question 10

What is a variegated plant?

Answer 10

One that doesn’t photosynthesis everywhere

As chlorophyll and starch are only found in some parts of the leaf

Question 11

What are the three limiting factors of photosynthesis?

Answer 11

Light intensity
Carbon Dioxide concentration
Temperature

Question 12

What are also used to produce proteins in plants?

Answer 12

Nitrate ions

Absorbed from the soil