Chapter 2 Biology

Question 1

Cell membrane?

Answer 1

The cell membrane is a very thin layer of protein and fat. It is important becuase it controls what goes out and in the cell

Question 2

Cell wall?

Answer 2

All plant cells are surrounded by a cell wall made mainly of cellulose. If the cell absorbs a lot of water and swells the cell wall will stops it bursting

Question 3

Cytoplasm?

Answer 3

It is a clear jelly. It is nearly all water (70%) it contains many substances dissolved in it. Especially proteins

Question 4

Chloroplasts?

Answer 4

They are never found on animal cells. Most of the green parts of the cell have them. Becuase it has a green pigment called chlorophyll

Question 5

Mitochondria?

Answer 5

They are tiny structures that are almost invisible and can only be seen by electro micro graphs, mitochondria can be found in all type of cell except for those of prokaryotes

Question 6

Ribosomes?

Answer 6

Tinier structures than mitochondria and can be seen by an electron microscope , can be found in all type of cells