Science biology paper 1

Eukaryotic cells- complex and in animal and plant cells.

Prokaryotic- small and simple and in bacteria.

Animal Cells

nucleus- controls what the cell does and this is where DNA is stored

cyctoplasm- where chemical reactions happen

cell membrane- controls what goes in and out of the cell

mitochondria- where aerobic respiration happens. Respiration transfers energy

Ribosomes- where protiens are made in the cell

Plant cell

Has everything an animal cell has and more!

cell wall- made of cellulose and supports ans strengthens the cell.

permanent vaccuole- contains cell sap

choloroplasts- where photosynthesis happens.

Photosynthesis makes food for the plant!

Bacterial cells

• a single loop of DNA
• plasmids- small rings of extra DNA
• cell wall
• cyctoplasm
• cell membrane

Estimating the area of subcellular structures...

length x width

Microscopy...

magnification = image size divided by real size