A lysosome is a membrane-bound cell organelle that contains digestive enzymes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria. If the cell is damaged beyond repair, lysosomes can help it to self-destruct in a process called programmed cell death, or apoptosis.

The nucleolus organizes the cell’s activity just like a mayor does for a city. The nuclear membrane is like a cities border because they control what goes in and out. The golgi body receives, sorts, and sends proteins away just like the post office does with packages.

The cytoplasm would be like the lawns in a city because they act like the fluid that fills a cell, its function is to contains all organelles and cell parts. The energy plants of charlotte would be the mitochondria of the city. They both play a critical parts in creating energy for a cell or for a city.

Cytoplasm consists of all of the contents outside of the nucleus and enclosed within the cell membrane of a cell. It is clear in color and has a gel-like appearance. Cytoplasm is composed mainly of water but also contains enzymes, salts, organelles, and various organic molecules.

Receptors provide information to nervous system about missing cells. Explanation: Your body know when cells are missing due to nervous system. So receptors are responsible to provide information to nervous system about missing cells.

Mutations are essential to evolution; they are the raw material of genetic variation. Without mutation, evolution could not occur.

A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation.

Neutral mutations do not help or harm the organism. Certain kinds of mutations are more likely to lead to a neutral mutation. For example, silent mutations (described below) are by definition neutral, because they do not result in a change to the phenotype.

​Mutation. A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.

These mutations are called neutral mutations. Examples include silent point mutations, which are neutral because they do not change the amino acids in the proteins they encode. Cells have multiple repair mechanisms to fix mutations in DNA.

Why is a cell’s membrane similar to a city wall? In the cell, an outer membrane – the plasma membrane, performs a similar function to the City Wall or City Ring Road. It completely surrounds the cell and provides the boundary between one cell and the next.

A city border is like a cell membrane because it allows what comes in and out of the city. The cell membrane is inside the cell wall just like a city border. Steel grinders are like a cytoskeleton because they are the structure of the city. Also plumbing can be like the cytoskeleton of the “cell”.

Indeed, many diseases have now been associated with abnormalities in cytoskeletal and nucleoskeletal proteins, including several cardiovascular disease syndromes, neurodegeneration, cancer (invasion), liver cirrhosis, pulmonary fibrosis, and blistering skin diseases.

Consequently, a variety of inherited diseases are accompanied by cytoskeletal malfunctions, including spastic paraplegias, spinocerebellar ataxias, and mental retardation.

(NOOR-oh-dee-JEH-neh-ruh-tiv dis-OR-der) A type of disease in which cells of the central nervous system stop working or die. Neurodegenerative disorders usually get worse over time and have no cure. They may be genetic or be caused by a tumor or stroke.

Zellweger syndrome is a genetic disorder passed from parents to children. It disturbs cellular function and causes serious problems soon after birth. Newborns can have brain, liver and kidney problems, as well as difficulty feeding or moving. There is no cure or treatment.