Organelles

Question 1

Cell wall

Answer 1

Rigid outer layer made of cellulose
Maintains cell shape
Protects from mechanical damage
Plant cells only

Question 2

Plasma membrane

Answer 2

Flexible phospholipid bilayer surrounding the cell
Selectively permeable membrane/barrier between the inside and outside of the cell
Plant and animal cells

Question 3

Cytoplasm (cytosol)

Answer 3

Semifluid jellylike substance containing other dissolved substances
Organelles and other components found inside
Plant and animal cells

Question 4

Cytoskeleton

Answer 4

Network of fibres throughout the cell (microtubules, micro filaments, intermediate filaments)
Give mechanical support
Help maintain cells shape
Animal and plant cells

Question 5

Centrosomes and centrioles

Answer 5

Cylindrical structures located just outside the nucleus
Help organize microtubule assembly
Play an important role in cell division
Animal cells only

Question 6

Cilia (cilium singular)

Answer 6

Tiny hair like extensions that move in a back and forth motion to propel the cell

Question 7

Flagella (flagellum singular)

Answer 7

Long whip like tails that use a snake like motion to propel the cell

Question 8

Nucleus

Answer 8

Contains chromatin (DNA and proteins), the genetic material of the cell and directs all cellular activities