The Golgi apparatus collects simple chemicals in the cell and assembles them into large, complex structures such as proteins. It also plays a role in the process of simple chemical secretion by forming closed vesicles around the substance to be transported. These vesicles then pinch off from the Golgi apparatus and drift to the cell's plasma membrane where the transported substance is released from the cell.Know More
The Golgi apparatus, also known as the Golgi complex or body, performs the essential role of sifting through the fragments of various macromolecules in the process of synthesis by the rough endoplasmic reticulum. It gathers these components together, stores some components and transfers others farther along its length for further synthesis before their eventual release. Once the macromolecules are assembled, the Golgi apparatus can either store them until needed or release them immediately for secretion through the cell membrane.
The transport vesicles released by the Golgi apparatus do not pass through the plasma membrane of the cell. Instead, they merge with the membrane, opening as they do so, and simply expose their contents to the bloodstream. This method of cellular transport is highly efficient and, after the initial separation from the complex, does not require the consumption of adenosine triphosphate, or ATP.Learn more in Molecular Biology & DNA
A ribosome plays a vital role in protein synthesis, a process by which proteins are produced from individual amino acids. A ribosome is a cytoplasmic granule consisting of RNA and protein. Ribosomes are one of the requirements for the protein synthesis to take place. A ribosome is a tiny particle composed of protein and up to 62 percent RNA.Full Answer >
Enzymes are proteins that act as biological catalysts. The function of an enzyme is to increase the rate of a biological reaction. When an enzyme is in contact with a compatible reactant called a substrate, a reaction can occur.Full Answer >
Channel proteins are proteins that enable the transportation of certain substances and materials across cell membranes. Channel proteins consist of a wide group of more than 20 different organic compounds and, although they share the umbrella title of channel proteins, these substances play different roles. Channel proteins are formed in long chains of amino acids; the sequence of these chains dictates the function and shape of each channel protein.Full Answer >
The most important polymers located within the nucleus of a cell are proteins and DNA molecules. Proteins exist as enzymes and structural components of a cell, and DNA functions as the blueprint for cellular reproduction processes that transfer hereditary information from cell to cell.Full Answer >