Unit 1.3 Task 1a
Cell membrane – The cell membrane is a biological membrane that’s job is to separate the interior of a cell from all of the cells in the outside environment. It is selectively permeable to ions and organic molecules. It also controls the movement of substances in and out of a cell. The function of the cell membrane is to protect the cell from its surroundings. The cell membrane can be found in plants and animal cells.
Cell wall – The cell wall is a very flexible but tough layer that surrounds some types of cells. It can be found on the outside of a cell on the outer layer of the cell membrane. It provides cells with structural support and protection. The major function of the cell wall is to act as a pressure vessel. This prevents …show more content…
Within the nucleus most of a cells genetic material is stored and organised as long linear DNA molecules of which there are many. Its function is to maintain the integrity of these genes and to control the activities of the cell. The nucleus acts as the control centre of the cell like a brain. A nucleus can be found in eukaryotic cells for example in animal cells.
Nucleolus – The nucleus is an organelle that can be locate in the nucleus of eukaryotic cells. It is made up of proteins and RNA. Its job is to transcribe and modify ribosomal RNA and to integrate ribosomal proteins to form immature ribosomes. It also acts as a stress sensor for eukaryotic cell as it is able to regulate ribosomal RNA synthesis based on a cellular. It is found within the nucleus and occupies about 25% of the volume of the nucleus.
Cytoplasm – The cytoplasm comprises cytosol which is a gel-like substance that is located within the cell membrane and the organelles. All of the cells contents are contained within the cytoplasm. Unless it’s a eukaryotic cell in which case the cytoplasm is separated from the cell’s nucleus. The cytoplasm is made up of about 80% water and is usually colourless. Within the cytoplasm many of the cellular activities take place such as cell