OCR gateway science - b3

Plants and animals have similarities and differences.

• energy for life processes is provided by respiration
• most of these reactions involved take place in mitochondria
• mitochondria are organelles surrounded by two membranes
• they break down food molecules to make ATP
• they provide the energy a cell need to move,divide,and produce secretory products and contract
• the mitochondria are located in the cytoplasm of a cell
• an organelle is a small structure within a cell

dna is found in the nucleus of every cell

it is a double stranded helix, each of the two strands is made up of lots of small groups of nucleotides

each nucleotides