SB6a

Question 1

What is the word equation for photosynthesis?

Answer 1

carbon dioxide + water —-> glucose + oxygen

Question 2

What is the symbol equation for photosynthesis?

Answer 2

6CO2 + 6H20 —-> C6H12O6 + 6O2

Question 2

What are the uses of glucose within the plant?

Answer 2

 Convert it into starch and store it.
 Convert it into sucrose and transport it around plant.
 Convert it into cellulose to build cell walls.
 Convert it into lipids to make cell membranes or store it.
 Use it to make proteins and chlorophyll.

Question 2

In what part of the plant does Photosynthesis?

Answer 2

Photosynthesis happens in the
chloroplasts.

Question 3

What are all the parts of the leaf structure?

Answer 3

Palisade cells
Cuticle (waxy coating)
Guard cells
Spongy mesophyll layer (air spaces)
Xylem and phloem
Stomata

Question 3

What are chloroplasts?

Answer 3

Chloroplasts are green discs found
in plant cells that contain
chlorophyll.

Question 4

What is chlorophyll?

Answer 4

Chlorophyll is a pigment that traps
light energy from the Sun.

Question 5

Describe the function of all the parts of the structure of the leaf.

Answer 5

Palisade cells are located near the top and packed with chloroplasts so they maximum light and do MOST photosynthesis

Cuticle prevents water loss and stops entry of microorganisms

Stomata allow carbon dioxide to enter and oxygen, water vapour to exit the leaf by diffusion

Guard cells open and close the stomata in order to conserve water if necessary

Spongy mesophyll layer Allows gases to diffuse easily to and from cells

Xylem and phloem transport water and sugars around plant

Question 6

Describe how the structure of a leaf is adapted for photosynthesis. (6)

Answer 6

Leaves are broad which Increase the surface area exposed to light so more energy can be absorbed.

Leaves are thin CO2 and water vapour can diffuse easily (short distance)

Guard cells open and close the stomata in order to conserve water if necessary

Spongy mesophyll layer Allows gases to diffuse easily to and from cells

Stomata allow carbon dioxide to enter and oxygen, water vapour to exit the leaf by diffusion

Cuticle prevents water loss and stops entry of microorganisms

Question 7

Parts of a plant cell.

Answer 7

chloroplast
vacuole
mitochondrion
cell wall
cell membrane

Question 8

What determines if the stomata are open or closed?

Answer 8

Stomata open and shut depending on the amount of light