Plant Organeel

Question 1

Cell wall

What kind if layer is this

Answer 1

It is a non living layer

Question 2

Waht do the large spaces in cell make it

Answer 2

large spaces in the cell wall make it porous/permeable

Question 3

It has pores which allows wat

Answer 3

• has pores allowing cytoplasmic threads, (plasmodesmata),

to connect the cytoplasm of neighbouring cells

Question 4

When mature it jas how many layers

Name thise layers

Answer 4

It has 3 layers when mature

> middle lamella (pectin)
primary cell wall (cellulose)
secondary cell wall (cellulose and lignin)

Question 5

What is the function of cell wall

Answer 5

• rigid and gives shape to plant cells
• protects cell contents and prevents the plant cell from
bursting
• enables water and dissolved substances to pass freely
through it.

Question 6

Name the 3 plastids

Answer 6

Chloroplast
Chromoplast
Leucoplast

Question 7

What does chloroplast contain

Answer 7

They contain the green pigment chlorophyll which absorbs sunlight (radiant energy) during photosynthesis:

CO2+ H2O + sunlight -> glucose + O2

Question 8

What are chromoplast

Answer 8

They are plastids that contain contain red, orange and yellow pigments.

They give colour to flowers and fruits

Question 9

What are leucoplast

Answer 9

They are colourless plastids found mainly in cells of roots, tubers such as
Potatoes, corms and some fruits.

They store startch

Question 10

What is the cytosol

Answer 10

• site of most chemical reactions

• transports minerals, dissolved nutrients and
gases by diffusion

it is the fluid in which organelles are found

Question 11

What does the cytosol consist of

Answer 11

consists of 90% water with dissolved substances like

> inorganic
“ gases (02, CO2)
› minerals (sodium, magnesium…)

› organic
› carbohydrates (glucose)
› proteins (enzymes)
› fats
› vitamins