B8 - Photosynthesis Flashcards Preview

AQA GCSE Biology > B8 - Photosynthesis > Flashcards

Flashcards in B8 - Photosynthesis Deck (8)
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1
Q

What kind of reaction is photosynthesis?

A

Endothermic

2
Q

Symbol equation for photosynthesis?

A

6CO2 + 6H20 ~ C6H12O6 + 6O2

3
Q

How are leaves adapted for photosynthesis? (6)

A
  • Broad = Large SA for light to fall on
  • Thin = diffusion distances for gases are short
  • Contain chlorophyll to absorb light
  • Veins to bring water and remove produce of photosynthesis (xylem + phloem)
  • Air spaces to allow CO2 to get to cells and oxygen to leave by diffusion
  • Guard cells open and close stomata to regulate gas exchange.
4
Q

Limiting factors of photosynthesis?

A

Light, temperature and CO2 conc. and amount of chlorophyll

5
Q

Equation for light intensity?

A

L.I = 1/distance2

6
Q

What do plants convert spare glucose into?

Why?

A

Starch.

Because it’s insoluble.

7
Q

Uses of glucose for a plant?

A
  • Produce lipids
  • Produce cellulose to strengthen cell walls
  • Produce amino acids for protein synthesis
8
Q

Inverse square law of light?

A

If the distance is doubled, the intensity of reduced by 4 times.

If distance is trebled, the intensity if reduced by 9 times