Important People

• robert brown discovered the nucleus

• robert hooke was the first to discover the cell

• Anton von leuwenhuek was the first to discover cells in living tissue

new cells are always formed from the pre-existing cells

cells are structural and functional units of life

• cell theory was postulated by Matthias Schleiden and Theodore Schwann.

  • Theodore Schwann looked at animal cells

Inside the Nucleus

• cells - nucleus - chromatin - chromosome - histone and dna - gene

• during cell division, chromatin structure condenses to become chromosome

• two protein structures in chromosome; histone protein and DNA.

• The dna is coiled around the histone protein. This is the chromosome.

Inside Chloroplast:

Thylakoid- contains chlorophyll; Light reaction takes place

Stroma - enzymes are present; helps dark reaction and synthesis of food

Magnification

light microscopes have limited resolution and magnification

Magnification = size of img/size of real object