Photosythesis Flashcards Preview

GCSE Biology > Photosythesis > Flashcards

Flashcards in Photosythesis Deck (25):
1

What is the word equation for photosynthesis?

Carbon dioxide + water → glucose + oxygen

2

What is the balanced symbol equation for photosynthesis?

CO2 + H20 → C6H1206 + 02

3

Where does the energy for photosynthesis come from?

The sun

4

What type of reaction is photosynthesis?

Endothermic (takes heat in)

5

Where is the energy stored in the plant?

In chlorophyll found in chloroplats

6

What is the energy converted to?

Chemical energy in form as glucose

7

What is the limiting factor?

The factor that stops the reaction

8

As the temperature increases...

More energy is given to the reaction

9

At what temperature does the rate drop to zero?

45°C

10

Why does the rate drop to zero at 45°C?

The enzymes controlling the reaction are destroyed

11

As the CO2 concentration increases...

The rate increases

12

When the increase in CO2 has no effect...

C02 is no longer the limiting factor

13

As light intensity increases...

Rate increases as has more energy

14

When more light has no effect...

Light is no longer the limiting factor

15

What does the graph for light intensity look like?

Steady increase then levels off

16

What does the graph for CO2 look like?

Steady increase then levels off

17

What does the graph for temperature look like?

An n shape, increase peak then decrease

18

What is glucose used for?

Energy

19

What 4 things can glucose be changed into?

1) Insoluble starch
2) Fat or oil
3) Cellulose
4) Proteins

20

Where is insoluble starch stored?

Stem, leaves or roots

21

Where is fat stored?

In seeds

22

What is cellulose used for?

Strengthen cell wall

23

What are proteins used for?

Growth and repair and enzymes

24

How do plants make proteins?

Use nitrate ions absorbed from soil

25

Why do plants use nitrate ions instead of glucose?

Amino acids contain nitrogen but glucose does not