A nucleolus is a substructure composed of nucleic acids and proteins that is found within the nucleus of a cell. Known as the ribosome production factory, malfunction of the nucleolus has been found to cause disease in humans.Continue Reading
A nucleolus is a non-membranous structure found within a cell's nucleus. It is composed of proteins and nucleic acids and is the site of rRNA (ribosomal ribonucleic acid) assembly and transcription. Nucleoli have three essential components: the fibrillar centers, the dense fibrillar components and the granular component; all of which aid in the transcription and assembly of ribosomes and RNA. Plant nucleoli have a different structure called a vacuole.
Due to its important role in ribosome production and genetic transcription, mutation or malfunction inside a nucleolus can lead to the development of disease as observed in the testing field.Learn more about Cells
A cell without a nucleus is classified as a prokaryotic cell. The genetic material of prokaryotic cells is free inside the cytoplasm. Prokaryotic cells do not have a need for compartmentalization, unlike more complex cells.Full Answer >
Lysosomes function much in the same way as the digestive system, in that they contain digestive enzymes that break down biological molecules, including carbohydrates, proteins, nucleic acids and lipids. They also destroy dead organelles inside the cell, allowing them to be replaced with more effective ones, a process known as autophagy.Full Answer >
Ribosomes join amino acids to synthesize proteins for the cell. Free ribosomes exist in the cell's cytoplasm, and bound ribosomes are part of the rough endoplasmic reticulum.Full Answer >
Human cells are a combination of water, proteins, carbohydrates, nucleic acids and fats contained in a lipid-based membrane. The precise composition of human cells varies widely, depending on a given cell's function in the body.Full Answer >