Photosynthesis 14/11/23

Question 1

what is the word equation for photosynthesis?

Answer 1

carbon dioxide + water –> glucose + oxygen

Question 2

what is the symbol equation for photosynthesis?

(balanced)

Answer 2

6CO2 + 6H2O –> C6H12O6 + 6O2

Question 3

what are the reactants of photosynthesis?

Answer 3

carbon dioxide and water

Question 4

what are the products of photosynthesis?

Answer 4

glucose and oxygen

Question 5

photosynthesis produces glucose. what can this glocuse be used for? (3 marks)

Answer 5

any 3 from:
* used for respiration
* stored as an insoluble starch
* used to make cellulose for cell walls
* converted into amino acids (nitrate ions are needed)
* can be converted into lipids

Question 6

where are they taken from?

what is needed for glucose to be converted into amino acids?

Answer 6

nitrate ions from the soil

Question 7

how does carbon dioxide enter the plant?

Answer 7

diffuses from air into leaves via the stomata

Question 8

how does water enter the plant?

Answer 8

absorbed from soil by root hair cells by the process of osmosis

Question 9

where does photosynthesis take place?

Answer 9

in the chloroplasts of palisade cells found in the leaf

Question 10

what do chloroplasts contain that’s needed for photosynthesis?

Answer 10

a green pigment called chlorophyll

Question 11

what does chlorophyll do?

Answer 11

absorbs sunlight

Question 12

how does oxygen leave the leaf?

Answer 12

diffuses out of the leaf via the stomata

Question 13

what are the limiting factors of photosynthesis?

Answer 13

• carbon dioxide concentration
• temperature
• light intensity
• chlorophyll availability

Question 14

what is a limiting factor?

Answer 14

a limiting factor is a condition that, when in shortage, slows down the rate of a reaction.