PhD Nest

Eukaryotic Cells: Definition, Parts, Structure, Examples

Eukaryotic Cells: Definition, Parts, Structure, Examples

Definition of Eukaryotic Cells Eukaryotic cells feature a membrane-bound, well-defined nucleus as well as several membrane-bound organelles, making them complicated in structure as well as function. The term “eukaryote” comes from the Greek words “eu” as well as “karyon,” which mean “true” as well as “nucleus,” respectively. When compared to prokaryotes, eukaryotic cells have a … Read more

Cilia and Flagella: Definition, Structure, Functions and Diagram

Cilia and Flagella: Definition, Structure, Functions and Diagram

Flagella and Cilia Definition Cilia and Flagella are cytoplasmic filamentous structures which protrude through the cell wall. They are the cell’s minute, highly distinct appendages. An entire cell is propelled by its flagella (singular form: flagellum), which are long, hair-like projections that protrude from the plasma membrane. Small hairlike structures called cilia (singular = cilium) … Read more

Nucleosome Model of Chromosome

Nucleosome Model of Chromosome

Nucleosome Model of Chromosome Chrosomes are self-replicating nucleic acid molecules that have particular organisational and functional characteristics and are essential for inheritance, mutation, variety and evolutionary advancement. Every chromosome’s structure is supported by many layers of DNA wrapped around proteins. Histones and non-histone chromosomal proteins are the traditional classifications for proteins which attach to DNA … Read more

Microtubules- Definition, Structure, Functions and Diagram

Microtubules- Definition, Structure, Functions and Diagram

Definition of Microtubules (What are Microtubules?) Microtubules are located within the cytoplasm of every eukaryotic cells, with the exception of human erythrocytes. Microtubules are small, empty, bead-like tubular structures that aid in cell shape maintenance. These are small hollow tubes present within cells that also serve as the cell’s motor. Figure: Diagram of Microtubules Image … Read more

Membrane Carbohydrate: Types, Structure and Functions

Membrane Carbohydrate: Types, Structure and Functions

Membrane Carbohydrate Individual cells as well as cellular compartments remain separated by cell membranes, which are selected boundaries. Membranes are made up of binding forces that hold carbohydrates, proteins, and lipids together. Carbohydrates are covalently bonded to proteins or lipids (glycolipids) and are a major constituent of cell membranes, where they serve as cell adhesion … Read more

Prokaryotic Cells: Characteristics, Components, Division, Examples

Prokaryotic Cells: Characteristics, Components, Division, Examples

Prokaryotic Cells Definition Prokaryotic cells are single-celled organisms that lack a membrane-bound nucleus and other organelles, making them primitive in form and function. The name “prokaryote” comes from two Greek words: “pro” for “before” and “karyon” for “nucleus.” Prokaryotes, the simplest form of life, are thought to be the first living species on the planet. … Read more