Without a nucleus, multicellular life forms, called eukaryotes, would not exist. According to the Molecular Expressions website from Florida State University, the nucleus acts as the administrative center and information processor for the cell by storing its genetic material and coordinating its activities.Know More
Molecular Expressions explains that simple, one-celled organisms, or prokaryotes, such as bacteria, do not have a nucleus. Instead, their genetic material is dispersed throughout the cell. Eukaryotes, on the other hand, require a greater degree of cellular organization because they perform more complicated functions. These functions include cell reproduction, growth, protein synthesis and intermediary metabolism. A membrane separates the nucleus' contents, which include strings of genetic material called DNA, from the rest of the cell. Each nucleus within a human cell contains nearly 6 feet of DNA arranged into a compact structure known as chromatin. This chromatin organizes to form chromosomes during cell division.
Each nucleus also contains at least one nucleoli, an organelle responsible for synthesizing ribosomes, which produce proteins along with other small cell components. The membrane of the nucleus is full of small holes that allow necessary molecules to pass between the nucleus and the rest of the cell, such as building blocks for DNA and RNA and energy-supplying components, notes Molecular Expressions.Learn More
Transcription occurs in the nucleus of the cell. The process involves making a strand of messenger ribonucleic acid (RNA) using deoxyribonucleic acid (DNA) as a template. Transcription is the first step in making a protein.Full Answer >
Although most chromosomes are found in the nucleus of a cell, some are also found in the cell's mitochondria. These organelles are responsible for changing energy into a form the cell can use.Full Answer >
Spirogyra cells contain chloroplasts, a large vacuole, a cell nucleus, cytoplasmic strands holding the nucleus in place and two cell walls. They are simple plants, with no specialized cells for absorbing water, transporting nutrients or reproduction.Full Answer >
In an animal cell, the cytoplasm is a semi-liquid substance that holds all the cell's organelles except the nucleus. It also acts as a repository for amino acids, sugars and other important nutrients used in the regular life of the cell. Finally, the cytoplasm stores a cell's waste until it is flushed from the cell.Full Answer >