Quick Questions

Question 1

Organisms that make their own food

Answer 1

Autotrophs

Question 2

Process of adding hydrogen to carbon dioxide

Answer 2

Reduction

Question 3

Incorporation of inorganic co2 into an organic molecule

Answer 3

Fixation

Question 4

Part of leaf able to change the orientation of the leaf lamina to face the sun

Answer 4

Leaf blade

Question 5

Layer of cell containing the most chloroplasts and how they’re adapted to aid photosynthesis

Answer 5

Palisade cell layer

Tall and closely packed together. Cylindrical shape for maximum absorption of light by chloroplasts.

Question 6

Why is a leaf so thin?

Answer 6

For efficient gas exchange and larger surface area for photosynthesis

Question 7

Function of the stomata

Answer 7

Like a valve for gas exchange whilst preventing loss of water

Question 8

How does the spongy mesophyll layer help photosynthesis

Answer 8

Allows lots of co2 into the leaf for photosynthesis

Question 9

Vascular tissue in a plant

Answer 9

Xylem and phloem

Question 10

How xylem helps photosynthesis

Answer 10

Transports h2o from roots to leaves

Question 11

How phloem helps photosynthesis

Answer 11

Transports glucose produced in photosynthesis to the rest of the plant

Question 12

Features of epidermal cells that assist the leaf photosynthesising

Answer 12

Thin+ transparent to allow light to reach the palisade cells

Question 13

Word equation for photosynthesis

Answer 13

Carbon dioxide + water = glucose + oxygen

Question 14

Chemical equation for photosynthesis

Answer 14

6CO2 + 6H2O -> C6H12O6 + 6O2

Question 15

Why do all living organisms need a source of energy

Answer 15

Movement 
Respiration 
Growth 
Reproduction 
Excretion 
Nutrition 
Sensitivity

Question 16

Autotrophic organisms 3 kingdoms

Answer 16

Prokaryotes
Protoctista
Plantae

Question 17

Heterotrophic nutrition.

Answer 17

Consumes food/ nutrition from other organisms

Question 18

Autotrophic nutrition

Answer 18

Creates own food energy from photosynthesis

Question 19

Energy source for photosynthesis

Answer 19

Solar energy

Question 20

Raw materials required for photosynthesis

Answer 20

CO2
H2O
Chlorophyll

Question 21

Waste product of photosynthesis. Why is it a useful byproduct?

Answer 21

Oxygen

Organisms need it to respire

Question 22

Photosystems

Answer 22

Photosynthetic pigments are arranged as Photosystems in the thylakoid membranes

Question 23

Two types of Photosystems

Answer 23

PS11 = P680 form (granal lamellae)

PS1 = P700 form (intergranal lamellae)

Question 24

Function of accessory pigments

Answer 24

Transfer energy to chlorophyll a by absorbing light at other wavelength ranges

Question 25

Examples of accessory pigments

Answer 25

Chlorophyll b | Carotenoids

Question 26

Purpose of photosynthetic pigment

Answer 26

To absorb light so that the plant can use its energy

Question 27

Why do plants use more than one pigment?

Answer 27

So it can absorb different colours of light and collect more energy

Question 28

The overall rate is determined by

Answer 28

The slowest reaction in the pathway

Question 29

Ways to measure the rate of photosynthesis

Answer 29

Oxygen production over time Carbon dioxide use per unit time