Form&Function of the EukaryoticCell
By: Mick Carmona
The Nucleus is separated from the cell cytoplasm by an external boundary called a nuclear envelope. The envelope is composed of two parallel membranes separated by a narrow space, and it is perforated with small, regularly spaced openings, or pores, formed at sites where the two membranes unite. The pores are passageways where macromolecules migrate from the nucleus to the cytoplasm, and vice versa. In the nucleus is a substance called the nucleolus, it is the site for ribosomal RNA synthesis and a collection area for ribosomal subunits. The subunits are transported through the nuclear pores into the cytoplasm for final assembly into ribosomes.
It is a microscopic series of tunnels used in transport and storage. There are two types of ER, there is RER and SER. The RER comes from the outer membrane of the nuclear envelope and goes through the cell cytoplasm. It transports materials from the nucleus to the cytoplasm.
The site where proteins are modified and then sent to there final destination. This organelle consist of several flattened sacs. Its the same as the ER in location and function.
It is the powerhouse of the cell, without it non of the cellular activities it commands would proceed. The cristae membranes hold enzymes and electron carriers of aerobic respiration. This is and oxygen-using process that extracts chemical energy contained in nutrient molecules and stores it in the form of ATP.
They are found in plants and algae, they help turn sunlight into chemical energy through photosynthesis. They're the primary producers of organic nutrients.