Chapter 1.7 Photosynthesis Flashcards Preview

FULL COURSE National 5 Biology > Chapter 1.7 Photosynthesis > Flashcards

Flashcards in Chapter 1.7 Photosynthesis Deck (14):
1

Photosynthesis is the

chemical process by which green plants make carbohydrate.

2

Photosynthesis is a series of

enzyme-controlled reactions in two stages

3

The first stage of photosynthesis is

photolysis (light-dependent stage)

4

In photolysis light energy from the sun is

trapped by the chlorophyll in the chloroplasts and is converted into chemical energy in molecules of ATP

5

In photolysis water molecules are

split to produce hydrogen and oxygen.

6

Excess oxygen from photolysis is

diffused out from chloroplasts and out of the cell

7

The second stage of photosynthesis is the

carbon-fixation stage.

8

In the carbon fixation stage, hydrogen from photolysis is

combined with carbon dioxide to produce sugar

9

In the carbon fixation stage, energy from

ATP id used in the production of sugar

10

The chemical energy in sugar can be released during

respiration

11

Sugar not used in respiration can be converted to plant products such as

starch or cellulose

12

Starch acts as a store of energy in plants while cellulose is a main chemical component of

plant cell walls

13

A limiting factor is a variable that

when in short supply can limit the rate of a chemical reaction such as photosynthesis.

14

The rate of photosynthesis is limited by various factors such as

temperature, light intensity and the concentration of carbon dioxide available.