Category Archives for "Cell Biology"

Epithelium: Definition, Characteristics, Types and Functions

The animal body consists of the some elementary tissues. These are epithelium or epithelial tissue or integumentary tissue, connective tissue or tissue of internal environment, muscular tissue and nervous tissue. The tissue which forms a limiting and lining membrane (epithelial membrane) and covers the free surface of an organ is known as epithelial tissue or […]

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Difference Between Plant Mitosis and Animal Mitosis

The cell division is the process by which organisms generate new cells. By this process, a single parent cell divides and creates identical daughter cells. During cell division, the parent cell duplicates its genetic material (DNA) and transmits to the daughter cells. There are three types of cell division such as amitosis, mitosis and meiosis. In […]

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Meiosis: Definition, Types, Stages and Significance

Dividing cell is one of the important events in our life which divide each day, each hour, each seconds. In this process, a single cell divides to form two cells and again two cells produce four cells and so on. This process is known as cell division or cell reproduction.  The cells of the particular […]

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RNA: Definition, Types, Structure and Functions

Johannes Friedrich Miescher (a Swiss physician and biologist) first discovered the Nucleic acids as ‘nuclein’ from the nucleus in 1869. Severo Ochoa de Albornoz (a Spanish-American physician and biochemist) discovered the RNA synthesis mechanism in 1959. He won the Nobel Prize jointly with Arthur Kornberg in Physiology or Medicine for his discoveries. In 1965, Robert […]

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Chromosome: Types, Structure and Functions

The word chromosome is derived from the Greek ‘Chroma’ meaning color and Greek ‘soma’ meaning body. The chromosome is the gene bearing rod-shaped structure which became clearly visible during the cell division and typically present in the nucleus that carries hereditary information in the form of genes.In 1942, Karl Nagli observed the rod-like chromosome in […]

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Cilia and Flagella: Structure and Functions

The hair-like extended portion of the cell surface bounded by the cell membrane and containing microtubules and responsible for cell motility are known as cilia and flagella. The cilia and flagella are widely distributed in both the animal and plant cells.Flagella (singular = flagellum) are complex filamentous, long, thread-like structures that extend from the plasma […]

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Microtubules: Structure and Functions

The cytoplasm of the eukaryotic cell contains numerous hollow ultrafine non-membranous tubules made up of tubulin protein and involved in the movement, and determination of cell shape is known as microtubules. Besides tubulin, microtubules also contain many other proteins, such as kinesin and dynein. The combination of microtubules and microfilaments forms the cytoskeleton of the […]

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Cytoplasmic Inclusions

The contents of the cell between the plasma membrane and nuclear envelope are known as cytoplasm. It is a gel-like clear substance that contains living and non-living materials such as water, enzymes, salts, organelles, and various organic molecules. Among them, organelles form the living inclusions, and non-living substances form cytoplasmic inclusions. These substances do not […]

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Cell Related Terms and Definitions

Biology: Biology is a branch of science which deals with the study of living organisms.Cytology: Cytology or cell biology is the study of the structure and function of the cell.Cell: Cell is the functional and fundamental unit of life.Cellular Respiration: Cellular respiration is a process by which cells produce the energy that is stored in […]

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