Photosynthesis

Question 1

Define chlorophyll

Answer 1

They are the green pigment found in the chloroplast in the plant. They trap in the energy from the light which they use to make food ( glucose)

Question 2

Define Producer

Answer 2

Producer is an organism that makes it’s own food

Question 3

Define consumer

Answer 3

Consumer is an organism that eats other organism to survive

Question 4

Draw a labelled diagram of palisade cell (plant cells located on the leaves).

Answer 4

Check, should contain these labelled parts:

1- Chloroplast
2- Nucleos
3- Mitochondria
4- Cytoplasm
5- Vacuole
6- Cell wall
7- Cell membrane

Question 5

What is the function of the chloroplast?
What is the function of Chlorophyll?

Answer 5

Chloroplast contains chlorophyll.

Chlorophyll is a green pigment that is found in chloroplasts
Chlorophyll transfers energy from light into energy in chemicals, for the synthesis of carbohydrates

Question 6

What is the function of cell membrane

Answer 6

Controls what goes in and out of the cell

Question 7

What is the function of the nucleus

Answer 7

Controls what the cell does

Question 8

What is the function of the cytoplasm

Answer 8

The place where the cell’s reactions occur

Question 9

function of chloroplast

Answer 9

Contain chlorophyll and are where photosynthesis occurs

Question 10

Function of vacuole

Answer 10

A storage place containing cell sap

Question 11

function of cell wall

Answer 11

Supports and protects the cell

Question 12

Define photosynthesis

Answer 12

Photosynthesis is the process in which plants manufacture carbohydrates ( sugar) from raw material using energy from light

Question 13

Define catalyst

Answer 13

Catalyst is a substance that increases the rate ( helps with) a chemical reaction without it undergoing any permanent change

Question 14

What are the raw material in photosynthesis

Answer 14

1- Water
2- Carbon dioxide

Question 15

What is the catalyst in photosynthesis

Answer 15

Chloroplast

Question 16

What are the products in phtotosynthis

Answer 16

Main product: Glucose
By product: Oxygen

Question 17

What is the source of energy in photosynthesis

Answer 17

Light

Question 18

1.Three things plants need to make their own food

Answer 18

1- Carbon dioxide
2- Water
3- Sunlight

Question 19

What does photosynthesis produce?

Answer 19

Glucose and oxygen

Question 19

2.What is photosynthesis?

Answer 19

Photosynthesis is the process in which plants manufacture carbohydrates ( sugar) from raw material using energy from light

Question 19

4.How is water transported to the leaf?

Answer 19

Transported to the leaf via the xylem

Question 20

5.Where does photosynthesis occur?

Answer 20

Chloroplast which contains chlorophyll

Question 21

Draw a flow diagram of photosynthesis

Answer 21

Check

Question 22

Write down one adaptation of root hair cell

Answer 22

1- Large surface area to increase absorption of water.

Question 23

Word equation for photosynthesis reaction

Answer 23

Chlorophyll Carbon dioxide + Water ————–>
sunlight
Glucose+oxygen

Question 24

Symbol equation for photosynthesis reaction-

Answer 24

6CO2 + 6H2O ➔ C6H12O6 + 6O2

Question 25

What happens to excess glucose

Answer 25

Excess glucose is stored as starch in other parts of the plant for when it need to use it. It turn iodine BLUE-BLACK. It is used for ENERGY and BIOMASS

Question 26

Suggest how the structure of the palisade cell is adapted for photosynthesis.

Answer 26

1- Contains lots of chloroplast
2- Closely packed
3- Upper part of the leaf

Question 27

Name the gas given off by the plant

Answer 27

Oxygen

Question 28

Explain what would happen to the number of bubbles (gas produced) if the plant was placed in the dark ( 3 marks)

Answer 28

1- No light
2- No photosynthesis
3- Number of bubbles will decrease/stop

Question 28

Explain what would happen to the number of bubbles (gas produced) if the plant was placed in the dark ( 3 marks)

Answer 28

1- No light
2- No photosynthesis
3- Number of bubbles will decrease/stop

Question 29

Describe the role of stomata

Answer 29

Stomata allows gases to diffuse in and out of the cell

Question 30

Distance between lamp and beaker (cm)
Number of bubbles released per minute
10
15
20
7
30
3
40
1
50
0

1. Describe the trend you notice
2. Explain the trend

Answer 30

1- As the distance between the lamp and beaker in cm increases, the number of bubbles released per minute decreases.

2- When the light is pushed further away, less light is being trapped in by the chloroplast. This means less energy is being used to make oxygen and glucose. As it moves further away, less and less energy is used until there is not enough energy from the light to have photosynthesis and if there is no photosynthesis then there is no glucose and oxygen.