Cell nucleus

On Earth there are two major type of cells. Prokaryote and Eukaryote Prokaryote Cell – simplest and most ancient type of cells. There where the only form of life in Earth for billions of years before eventually giving rise to Eukaryote cells (2.7 billion years ago). If you take a look at Prokaryote and Eukaryote side by side, you can see a number of differences. To begin with, prokaryote cells are a lot smaller than Eukaryote cells and have a simpler structure. But bare in mind that this simple…

Eukaryotic and Prokaryotic cell components by FATIMA MOHIDIN Eukaryotic Cell Eukaryotic cells are cells that contain a nucleus and have membrane bound organelles they are multicellular cells and undertake reproduction by the process cell division known as meiosis and mitosis. There are 2 types of eukaryotic cell: plant and animal cells. They contain organelles such ribosomes, smooth and rough endoplasmic reticulum, mitochondria, nucleolus, centrioles, cell membrane, flagella, cilia,…

Every cell in the body has a nucleus. The nucleus is the largest organelle and is contained within a membrane. The nucleus contains the body’s genetic material, which directs the activities, like the brain of the cell. This is built from DNA and proteins called histones coiled together forming a fine network of threads called chromatin. When under the microscope the most prominent part of the cell is the nucleus. The most visible structure within the nucleus is the nucleolus, which is where…

INTRODUCTION TO THE CELL The cell is defined as the smallest unit of life. It is originated from a Latin word cella meaning ‘small room’ a word used by Hooke (in the year 1665 while observing a cell with the microscope he built by himself) to describe the cells. The cell is considered as a living thing because it has the ability to metabolize, grow and reproduce. Before the invention of microscope, it was difficult to talk about cells as they were tiny and so not visible with the naked eyes but…

The simple definition of Eukaryotes is that they are any organism whose cells contain a nucleus and other membrane enclosed organelles. Taxonomically, Eukaryotes belong to the taxon Eukarya. The three types of eukaryotic microbes are fungi, protozoa, and algae. Because the three types of eukaryotic microbes are all composed of eukaryotic cells, they have basic similarities in cellular structure, including the presence of a nucleus. However, these types of microbes do differ in many significant…

Cell membrane- A cell membrane is a fine structure that can also be referred to as a plasma membrane. Both Eukaryotic and prokaryotic cells are enclosed by a cell membrane. The functions are to keep a steady shape of the cell and to control particles moving into and out of the cell. These particles may be ions or molecules. Cell wall- Prokaryotic cells have a cell wall whereas eukaryotic cells don’t. The cell wall is what provides shape and protects the cell components. Nucleus- Nucleus is only…

The nucleus is in the center of all eukaryotic cells and is a very important part. The function of the nucleus is to be the control center of the cell and contains most of the cells DNA. Chromatin and chromosomes are also contained within the nucleus. The nucleolus is a small, dense region that is located at the center of the nucleus. The nucleolus' function is to make ribosomes, "the beginning". The nuclear envelope is made up of two membranes, which surround the nucleus. The nuclear envelope…

• The nucleolus is a darker staining region of the nucleus. It is non-membrane bound structure composed of ribonucleic acids (RNA) and proteins. It makes ribosomes inside the nucleus and contains all the DNA of the cell. It is also used for cellular reproduction and it is often referred to as the brain of the cell as it controls what goes on. Golgi apparatus A group of fluid-filled flattened membrane bound sacs located close to the nucleus. Vesicles are regularly seen at the sacs' edges.…

A cell is the lowest level or organisation that can perform all activities required for life and is capable of independent reproduction, unlike a virus which is not a cell because it cannot independently reproduce and requires a host cell to do so. Both prokaryotes and eukaryotes are types of cell but vary in terms of structure. A prokaryotic cell is a cell which lacks a defined nucleus, meaning there is a nucleoid which is not bounded by a membrane. Prokaryotes and usually unicellular, but…

Mitochondria’s role within the cell is to perform aerobic respiration (respiration in the presence of oxygen) to create ATP (adenosine 5′‐triphosphate) which is then transported around the cell to be used as chemical energy. The enzyme used to make the ATP is housed within the inner membrane which is why the convoluted shape is necessary. This shape maximises the surface area, and therefore maximises the amount of ATP that is generated. Within cells that are highly active such as muscle cells,…