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 about Molecular Biology & DNA
Active transport requires energy because it is pumping particles, such as proteins, ions and sugar molecules, against a concentration gradient: from areas of lower to higher solute concentration. The main energy source for active transport is adenosine triphosphate, or ATP, although electrochemical and light energy are also used.Full Answer >
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 >
The pattern of base pairs in the DNA double helix encodes the instructions for building the proteins necessary to construct an entire organism. DNA, or deoxyribonucleic acid, is found within most cells of an organism, and most organisms have their own unique DNA code. One exception to this is cloned organisms, which have the same exact DNA code as their parents do.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 >