Photosynthesis

Question 1

What colour are the outside cells of a leaf?

Answer 1

Transparent

Question 2

What are the Palisade and spongy mesophyll cells full of?

Answer 2

Chloroplasts

Question 3

What do Chloroplasts contain?

Answer 3

Chlorophyll and other pigments that absorb light for photosynthesis.

Question 4

What do stomata pores allow to pass into and out of the leaf?

Answer 4

Gases

Question 5

What protects stomata?

Answer 5

Guard cells which open and close when needed.

Question 6

What do plants need to photosinphesys?

Answer 6

Sunlight and Chlorphyll

Question 7

What is the word equation for photosynthesis?

Answer 7

Carbon Dioxide + water = glucose + oxygen

Question 8

What is the balanced symbol equation for photosynthesis?

Answer 8

6CO(2) +6H(2)O -> C(6)H(12)O(6) + 6O(2)

Question 9

What does plants take up as food?

Answer 9

Nutrients from the soil.

Question 10

What diffuses into and out of plants during photosynthesis and respiration?

Answer 10

Oxygen and Carbon dioxide.

Question 11

What three conditions can increase the rate of photosynthesis?

Answer 11

• More Carbon Dioxide
• More light
• Warmer temperatures

Question 12

What is glucose used for?

Answer 12

Respiration

Question 13

What is starch used for?

Answer 13

Storage is tubers.

Question 14

What are amino acids used for?

Answer 14

Proteins for growth.

Question 15

What are fats and oils used for?

Answer 15

Energy storage in seeds.

Question 16

What colour does iodine turn in the presence of starch?

Answer 16

From Orange-red to Blue-Black

Question 17

Is starch soluble?

Answer 17

No, it is insoluble.

Question 18

Does starch affect the water balance in plant cells?

Answer 18

No.

Question 19

Is starch stored in cells found in a leaf?

Answer 19

Yes.

Question 20

Can iodine solution be used to detect the presence of starch?

Answer 20

Yes.

Question 21

Is most of the glucose made in photosynthesis converted to starch?

Answer 21

Yes.

Question 22

Do all plants store starch in tubers?

Answer 22

No.

Question 23

What are the green parts of a leaf called and what do they contain?

Answer 23

Chloroplasts which contain chlorophyll.

Question 24

Why do plants have broad leaves?

Answer 24

Large surface area for absorption of light.

Question 25

Why do plants contain chlorophyll?

Answer 25

To absorb light energy.

Question 26

Why do plants have air spaces?

Answer 26

To allow gas exchange.

Question 27

Why do plants have thin leaves?

Answer 27

Short diffusion distances for gases.

Question 28

Why do plants have veins?

Answer 28

To transport water and remove products of photosynthesis?

Question 29

What substances are needed for photosynthesis?

Answer 29

Chlorophyll, Light, Carbon dioxide and water.

Question 30

Does increasing room temperature always increase the rate of photosynthesis?

Answer 30

No.

Question 31

Are photosynthetic enzymes denatured at low temperatures?

Answer 31

No.

Question 32

What are the main limiting factors of of photosynthesis?

Answer 32

Temperature, Light intensity and carbon dioxide concentration.

Question 33

Are chlorophyll levels a limiting factor?

Answer 33

Yes.

Question 34

Does temperature affect all chemical reactions?

Answer 34

Yes.

Question 35

Is too much carbon dioxide toxic for plants?

Answer 35

No.

Question 36

What are the products of photosynthesis?

Answer 36

Both glucose and oxygen.

Question 37

To make proteins, plants need to combine glucose with which other substance?

Answer 37

Nitrates.

Question 38

What is meant by a hydroponic system?

Answer 38

Plants grow in water with a perfect balance of nutrients.

Question 39

Where do plants get the nutrients required to make their cell walls?

Answer 39

They make their own nutrients from raw materials.

Question 40

What adaption means that cells inside the leaf get a good supply of carbon dioxide?

Answer 40

Large air spaces in the leaf.

Question 41

During the day, what is the movement of gasses into and out of the leaf?

Answer 41

Carbon dioxide moves into the leaf and oxygen moves out of the leaf.

Question 42

What is an endothermic reaction?

Answer 42

A reaction that require an input of energy from the environment.