Photosynthesis Process And Leaf Structure

Question 1

State the chemical equation for photosynthesis

Answer 1

6CO2 + 6H2O ——> C6H12O6 + 6O2

Question 2

What is photosynthesis?

Answer 2

Process which plant manufactures carbohydrates in the presence of light using carbon dioxide and water.

Question 3

Where does photosynthesis take place.

Answer 3

In the palisade mesophyll and spongy mesophyll. (Organs that contain chloroplasts/chlorophyll).

Question 4

What is the purpose of photosynthesis?

Answer 4

To create a carbohydrate called glucose, which is food for the plant

Question 5

State the difference between chloroplast and chlorophyll?

Answer 5

-Chloroplast contains green pigments called chlorophyll to trap sunlight for photosynthesis process

Question 6

What is granum?

Answer 6

A stack of Thylokoids in a chloroplast

Question 7

State all parts of the leaf form up to down

Answer 7

-Waxy cuticle
-Upper epidermis
-Palisade mesophyll
-Spongy mesophyll
-Vascular bundle (xylem and phloem)
-Lower epidermis
-Guard cells
-Stomata

Question 8

What is the function of the leaves?

Answer 8

Contains chlorophyll for photosynthesis process

Question 9

What is the function of the roots?

Answer 9

Absorbs water and minerals and water from the soil.

Question 10

What is the function of the stem?

Answer 10

Transports glucose and water within the plant.

Question 11

State one adaptive feature and one function of waxy cuticle

Answer 11

Adaptive feature: made up of wax
Function: act as a water proof to reduce water loss

Question 12

State one adaptive feature and one function of Upper epidermis

Answer 12

Adaptive feature: transparent media
Function:For protection/ or allow sunlight to penetrate through the leaf

Question 13

State one adaptive feature and one function of palisade mesophyll

Answer 13

Adaptive feature: large number of chloroplasts, tightly packed together
Function: trap sunlight for photosynthesis process

Question 14

State one adaptive feature and one function of spongy mesophyll layer

Answer 14

Adaptive feature: contains air space
Function: allow air particles to diffuse

Question 15

State one adaptive feature and one function of Vascular bundle

Answer 15

Xylem: transports water form root up to the leaf
Phloem: translocation products of photosynthesis

Question 16

State one function of guard cells

Answer 16

Open and close stomata and for protection

Question 17

State on function of stomata

Answer 17

Allow gas exchange

Question 18

State the difference between stomata and air space

Answer 18

Stomata are the external access point to the internal air space.

Question 19

How do plants utilize the products of photosynthesis ?

Answer 19

-Stored as starch
-Used by the plant as a source of energy
- Transport as a sucrose.

Question 20

List the steps to test for starch and their reasons.

Answer 20

1) Heat the leaf in boiling water
Why: To destroy all the leaf cells or denature of enzymes

2) Heat the leaf in Ethanol
Why: To remove chlorophyll and since ethanol is flammable

3)Wash the leaf with water
Why: To soften the leaf

4) Add iodine solution
Why: To test for starch

Question 21

What colour will the leaf turn if Stacy is present in a starch test?

Answer 21

Blue/black

Question 22

Which solution produces carbon dioxide and which absorbs it?

Answer 22

NaHCO3 solution ( Sodium hydro carbonate) produces carbon dioxide.
NaOH solution (sodium hydroxide) absorbs carbon dioxide

Question 23

Which colour will an indicator turn into when carbon dioxide is present?

Answer 23

Yellow

Question 24

Which colour will an indicator turn into in the presence of oxygen?

Answer 24

Purple

Question 25

Why do plants need transport systems?

Answer 25

They are cellular, which means they have a huge demand of resources.

Question 26

List the aspects of xylem

Answer 26

-Carries water and minerals to the leaves - made out of dead cells -Cell wall made of lignin -No cytoplasm -Thick cell wall -flow is upward -Has a hollow tube

Question 27

List the aspects of phloem

Answer 27

-Carries (glucose) to growing parts and storage organs -made of living cells -Cell wall made of cellulose -Permeable cell walls -Thin cell wall -Flow is up and down

Question 28

List the Adaptive features of root hair cells to its function

Answer 28

-Cellulose cell wall: maintain the shape of the cell -Vacuole: maintain osmotic pressure -Nucleus: Maintain the cell activity -Long projection: To increase surface area for absorbing water and minerals

Question 29

What is meant by transpiration?

Answer 29

-Water vapor evaporates form the cell lining the air spaces and then passes out of the leaf through the stomata by diffusion .

Question 30

Describe the function of the guard cells

Answer 30

Guard cells control the size of the stomata. When they are swollen this means the stoma is opening . When they are shrunken this means the stoma is closing.