The function of an onion cell is to organize the biological processes of an onion. The onion, like other complex organisms, has different cells. There are cells that make up its leaves and flowers, cells that make up the onion bulb and cells that make up its roots.Continue Reading
The type of onion cell in the plant is determined by the proteins the cell produces. As in most living things, the onion's DNA creates the blueprint for all the proteins the plant produces.
As a plant cell, the onion cell is different from the cell of an animal. For one thing, it has a cell wall that surrounds the cell membrane, which an animal cell lacks. At least some kinds of onion cells have chloroplasts, which is where photosynthesis takes place. Photosynthesis creates fuel for the plant.
An onion cell also has mitochondria, which are the power plants for the cell. Onion cells also have nuclei, which contains proteins, DNA and nucleoli. There are also Golgi bodies, which are flat bodies that prepare carbohydrates and proteins to be exported out of the cell. There are large, watery spaces called vacuoles and ribosomes. Ribosomes contain RNA, which copy the blueprints of proteins made by the DNA. Everything floats in a jelly-like substance called cytoplasm.Learn more about Cells
The cell wall of plants maintains the shape of plant cells, supports and strengthens plants, resists water pressure, controls cell growth, regulates metabolic processes for the plant, acts as a physical barrier for the plant, stores carbohydrates and helps with cell to cell signaling. The cell wall is a tough, yet flexible layer that surrounds the cell membrane of plant cells.Full Answer >
According to the Encyclopedia Brittanica, the cell membrane has two main functions: regulating which molecules go in and out of the cell and separating incompatible processes occurring within organelles. Without the cell membrane, toxins would inevitably enter the cell and cause damage.Full Answer >
Diffusion allows the cell to replenish chemicals needed for cellular metabolic processes. Chemicals are able to pass both in and out of the cell membrane without the cell expending any energy when diffusion occurs. Movement across the cell membrane without the expenditure of energy is known as passive transport.Full Answer >
Both the processes of mitosis and meiosis divide the cell nucleus and its contents. Mitosis occurs in all cells of the body, whereas meiosis happens only in the sex cells.Full Answer >