animal plant bacteria cells

• is a animal cell

  
• is a plant cell

  
• cell membrane controls what enters and leaves the cell e.g. oxygen ,carbon dioxide , glucose
• the nucleus is a large structure that contains genes that control the activities of the cell
• cytoplasm is a jelly like substance that fills the cell - many reactions take place here
• chloroplasts contain chlorophyll which absorbs light energy to make sugars during photosynthesis
• mitochondria are organelles found within cells, they produce energy from food molecules by respiration.
• vacuoles store water, waste products or pigments
• ribosomes are present in cytoplasm but not visible and is where proteins are made (protiensynthesis)
• cell wall provides support and protection
• animal cells and plant cells are eukaryotic cells but bacterial cells are prokaryotic cells
• Eukaryotic cells and prokaryotic cells have:

  • a cell membrane
  • cytoplasm
• Only prokaryotic cells have

  • a cell wall surrounding them
  • do not have a nucleus
• In bacteria a single loop of chromosomal DNA lies free in the cytoplasm this carries most of the bacterial gene
• Some bacteria have a flagellum (tail) to help them move
• Many bacteria have a cell wall for protection but it is made of a different substance to that of plant cell walls
• Some bacteria have extra circles of DNA called plasmid DNA . Plasmids contain additional genes that are not found in chromosomes
• The nucleus of a cell contains chromosomes made of DNA molecules which carry a large number of genes the chromosomes are normally found in pairs in body cells.