However, are also of great importance, as sources of food (mushrooms) and antibiotics (penicillin); they are also used in brewing alcohol, baking, making soy sauce, Quorn, tempeh and blue cheese. Fungi are eukaryotic, this means that their DNA is enclosed within a nucleus and that their cells contain membrane bound organelles. They also have cell walls which contain chitin and store carbohydrates as glycogen. Fungi can reproduce asexually and sexually. One form of asexual reproduction is budding. This is when the parent cell forms a bud, the bud elongates and the DNA in the nucleus replicates. The cell nucleus then divides into two and one nucleus migrates into the bud. A wall forms between the bud and the parent cell with the bud eventually breaking away. Protozoa Protozoa are unicellular eukaryotic organisms. Protozoa, as traditionally defined, are mainly microscopic organisms, ranging in size from 10 to 52 micrometres. Some, however, are significantly larger. Most protozoa can be seen with a light microscope. They are a subgroup of the kingdom Protista which contains organisms which do not fit into the other four kingdoms (prokaryotes, fungi, animals and plants). Protozoans are pathogens and infections can cause malaria, sleeping sickness and amoebic dystentry.
However, are also of great importance, as sources of food (mushrooms) and antibiotics (penicillin); they are also used in brewing alcohol, baking, making soy sauce, Quorn, tempeh and blue cheese. Fungi are eukaryotic, this means that their DNA is enclosed within a nucleus and that their cells contain membrane bound organelles. They also have cell walls which contain chitin and store carbohydrates as glycogen. Fungi can reproduce asexually and sexually. One form of asexual reproduction is budding. This is when the parent cell forms a bud, the bud elongates and the DNA in the nucleus replicates. The cell nucleus then divides into two and one nucleus migrates into the bud. A wall forms between the bud and the parent cell with the bud eventually breaking away. Protozoa Protozoa are unicellular eukaryotic organisms. Protozoa, as traditionally defined, are mainly microscopic organisms, ranging in size from 10 to 52 micrometres. Some, however, are significantly larger. Most protozoa can be seen with a light microscope. They are a subgroup of the kingdom Protista which contains organisms which do not fit into the other four kingdoms (prokaryotes, fungi, animals and plants). Protozoans are pathogens and infections can cause malaria, sleeping sickness and amoebic dystentry.
unit_17_learning_aim_a.docx