Biology Cells And Cell Structure

Cell and Cell Structure

Human and Animal Cells have...

• Nucleus -   contains genetic material that controls activities of cell
• Cytoplasm - where most chemical reactions take place. Enzymes control these reactions
• Cell Membrane - control passage of substances in and out of cell an holds cell together
• Mitochondria - where most energy is released in respiration
• Ribosomes - where proteins are made

Plant ALSO have..

• Chloroplasts - absorb light energy to make food. Where photosynthesis happens. Contains green substance called chlorophyll
• Permanent Vacuole - filled with cell sap (weak solution of sugar and salt)
• Rigid Cell Wall - made of cellulose. Supports cell and strengthens it

Bacteria Cell... (Single celled organism)

• Has Cytoplasm And a cell membrane surrounded by a cell wall
• Genetic material floats in the cell because it has no nucleus.

Yeast... (single-celled organism) 

• nucleus, cytoplasm and a membrane surrounded by a cell wall

Specialised Cells (Specific for Function)

Palisade Leaf Cells (Photosynthesis)

• Lots of chloroplasts near top of cell so they are nearer light for photosynthesis
• Tall shape so they have more surface area on the side…