Structure and Function of Eukaryotic Cell Organelles

The nucleus of a eukaryotic cell holds the majority of the cells DNA material, the nucleus is often referred to as the ‘control centre’ of the cell as it uses the DNA to direct all other activities within the cell.

Although both of these cells contain DNA, only eukaryotic cells contain a nucleus. The nucleus is the largest organelle, surrounded by a double membrane (nuclear envelope) containing lots of pores. The nuclear membrane protects contents of the nucleus and controls the transport of substances in and out. The nucleus contains linear DNA in chromatin which protects the DNA from damage. Chromatin is formed of DNA which controls the activities of the cell. The nucleus often contains a structure called the nucleolus. This structure produces ribosomes which enter the cytoplasm in the cell through the nuclear pores, as well as transcribing DNA into RNA.

A nucleus is what stores newly made proteins, this would be false. The nucleus store chromosomes. The organelle that stores newly made proteins are golgi

There are several different organelles which allow the cell to carry out its function which is reproduction and growth. There are important organelles that the eukaryotic cell needs, one of which is that the nucleus is present. The nucleus acts as the brain of the eukaryotic cell. DNA is found in the nucleus which holds all the genes and also controls the cell. The cells function is to reproduce, which needs the nucleus to do this. To carry out another function which is to reproduce, the chromosomes which are found in the DNA are needed and copied. The cell also needs a lot of energy for this. The energy is created by the eukaryotic cell’s other organelle which is mitochondria. The mitochondria make energy out of food and then give the cell the energy it needs to carry out its function. The lysosome then digests enzymes which breaks down the

The nucleus creates mRNA and the mRNA goes through the nuclear pores into the cytoplasm. The mRNA is transcribed the from the DNA. Once the mRNA enters the cytoplasm it is translated by ribosomes, than the corresponding amino acids come and form proteins.

Nucleus- which is an organelle is found eukaryotic cells. The nucleus is the control point of the cell which helps control movement, eating, reproduction and also contains genetic material. The nucleus and the other organelles are surrounded by the nuclear envelope; it is similar to the cell membrane. The nucleus contains something called chromatin which is made of RNA, DNA and nuclear proteins. DNA contains genetic material and also instructions to how to make our body work properly. DNA is tied up by chromosomes. As the DNA cannot travel outside the nucleus to give instructions, it makes a smaller copy of it self which is known as RNA. The RNA which does travel from the nucleus then gets read by the ribosomes, which then proceeds on to make proteins. The main function of the nucleus is to control gene expression and to help the replication of DNA which takes place during the cell cycle.

Act as all the activity is instructed by the nucleus, it instructed to build proteins, but as the nucleus not function well, nucleolus would not able to produce the RNA for ribosomes. Furthermore, ribosomes give all the cells source

Lysosomes: Lysosomes contain enzymes that break down and digest large molecules into smaller molecules. To me this sounds like the function of the stomach, which also digests large materials into smaller materials to send into the body as nutrients and proteins. The stomach and lysosomes also share an acidic environment for the material to be digested in.

The largest organelle, the nucleus is a membrane-bound organelle that contains the vast majority of the cell’s DNA. The nucleus is considered the defining feature of a eukaryotic cell because its presence separates eukaryotes from the more ancient prokaryotic cell. The nucleus is often referred to as “the control center” of the cell because the DNA that it contains directs all aspects of cellular function (18). While most cells only have one nucleus, some cells (red blood cells) lack a nucleus and are therefore unable to divide and produce daughter cells. In humans, some types of skeletal muscle cells have multiple nuclei during their development; however multinucleated cells can also be associated with inflammation (19) and tumor development (20).

Upon binding the virus enters human cells via receptor-mediated endocytosis and forms a vesicle known as an endosome.

The nucleus is critical to cell biology. In an academic analogy, it acts as the principle. It is the control center and it stores DNA. There are three major parts to the nucleus which are the nuclear envelope, nucleolus, and DNA. The Nucleus is within eukaryotic cells and is protected by a nuclear envelope. The envelope has pores that allow substances, like proteins and ribosomal subunits, to travel in and out of the nucleus. On the inside of the nuclear envelope, is nucleoplasm. Nucleoplasm is a jelly like matter were subtances are dissolved. The Nucleolus is a small, ball-like structure that sits inside the nucleus and produces subunits of ribosomes. The DNA in a nucleus is found in chromatin. It is a stringy substance that surrounds the

The nucleus houses most of the genes in a eukaryotic cell. The genetic instructions are housed within a cell, and the instructions are carried out by the ribosomes. The nucleus directs protein synthesis by synthesizing messenger RNA according to instructions provided by the DNA. The mRNA is then transported to the cytoplasm via nuclear pores.

Are organelles that have digestive enzymes. They help get rid of unnecessary organelles, food pieces, and viruses or bacteria. They pretty much get rid of the thigs your body doesn’t need. Whatever is damaged or old in your body, this cell stores it on the outside section of the lysosome. Then the membrane opens and the particle is moved to the lysosome. Inside, the enzymes that are made break down whatever particles were transferred to the lysosome. Finally, after everything has been broken up the lysosome opens and sends the remains into the cell in the form of a vesicle.

Lysosome: An organelle that is enclosed in a membrane. It contains digestive enzymes that are able to break down polymers such as nucleic acids, proteins, lipids and carbohydrates. They are shaped like a dense sphere but vary in size depending on what material they have taken in to digest.

The nucleus contains chromosomes in which the DNA encodes proteins. The mRNA molecules transcribed from the DNA leave through the nuclear pores in the nuclear envelope to attach to free ribosomes or ribosomes on the rough Endoplasmic Reticulum (rER). mRNA molecules try to bind to ribosomes as they contain ribosomal RNA (rRNA) transcribed from DNA in the nucleolus. The attachment of mRNA allows protein synthesis to occur at the ribosome, producing proteins in their primary structure. These polypeptide chains then travel through the rER where they are packaged and pinched off into little vesicles and carried to the Golgi complex. They are then chemically modified and folded into newly synthesised proteins which can then leave the cell (exocytosis) through secretory vesicles produced at the Golgi complex.