The nucleolus contains all of the information needed for DNA replication, flow of proteins and RNA, all while controlling the synthesis of protein and cell replication. The nucleolus has several parts: the nuclear envelope, the chromatin and the actual DNA.Know More
The nuclear envelope is full of pores that the cell uses to regulate the flow of material in and out of the nucleus. This material can be macromolecules, such as protein or RNA. These materials are limited in how much is allowed to come in and out of the nucleus.
There are exceptions to this process, which apply to things like water, ATP and ions. These exceptions are small molecules which do not carry information like the macromolecules. This is just one way of the nucleus controlling the information that flows in and out of it.
Most important in the nucleus is the DNA, which is made up of long chains called chromosomes. These are protected by the nucleus envelope and are required for the process of transcription or protein synthesis. It is also the crucial element of cell division, both the mitosis and meiosis. The cell being able to access the DNA and reproduce itself is key in many aspects of the health and growth of organisms.Learn more in Cells
Although an animal cell has life and a car is lifeless, the two have some structural and functional similarities. Both a cell and a car move, are enclosed, have storage functionality and have facilities for moving fuel or nutrients.Full Answer >
Animal cells aren't all shaped the same way; the shape of a specific animal cell depends on its function and where it is in the body. Unlike plant cells, animal cells do not have rigid cell walls that limit them to a rectangular shape.Full Answer >
A lysosome is an organelle in an animal cell that contains enzymes to break down outside materials that enter the cell, as well as obsolete cell material. The lysosome acts as the digestive system for the cell, consuming proteins, carbohydrates and lipids.Full Answer >
An animal cell is defined as a eukaryotic cell in which all the organelles are contained in membranes. Organelles included in an animal cell are a nucleus, the centrioles, an endoplasmic reticulum, a golgi complex, lysosomes, the mitochondria and ribosomes.Full Answer >