Search Results for: membrane protein
Cell membrane
Cell Membrane Definition Just like any non-living body possesses a plastic or paper packaging material that keeps the... Read More
Membrane protein
Definition noun, plural: membrane proteins A type of protein that is attached to, or associated with, a biological... Read More
Plasma membrane
Do all cells have a plasma (or cell) membrane? Yes, all cells have a biological membrane that separates the protoplasm from... Read More
Endomembrane system
Ever wondered how biomolecules are made within the cell and then they are released outside the cell for use by the body?... Read More
Integral membrane protein
Definition noun A protein molecule (or assembly of proteins) that is permanently attached or firmly anchored in the plasma... Read More
Peripheral membrane protein
Definition noun, plural: peripheral membrane proteins A protein that temporarily adheres to the biological membrane, either... Read More
Selectively-permeable membrane
Selectively Permeable Membrane Definition We can define selectively permeable membranes as those that are selectively... Read More
Carrier protein
Carrier protein is a type of cell membrane protein involved in facilitated diffusion and active transport of substances out... Read More
Sarcolemma
Sarcolemma Definition What is the sarcolemma? It is the thin, transparent, extensible plasma membrane of the muscle cell.... Read More
Facilitated diffusion
Facilitated diffusion is the transport of substances across a biological membrane from an area of higher concentration to an... Read More
Movement of Molecules Across Cell Membranes
Diffusion Diffusion is essentially the movement of molecules from a region of higher concentration to a region of lower... Read More
Chemiosmosis
Chemiosmosis Definition What is chemiosmosis? In biology, chemiosmosis refers to the process of moving ions (e.g. protons)... Read More
Endoplasmic reticulum
Definition noun plural: endoplasmic reticula (cell biology) A membrane-bound organelle that occurs as labyrinthine,... Read More
Mitochondrion
Mitochondrion Definition What are mitochondria? The term “mitochondrion” comes from the two words of the Greek... Read More
Cell Structure
The interior of the cell is divided into the nucleus and the cytoplasm. The nucleus is a spherical or oval-shaped structure... Read More
Polypeptide
Polypeptide Definition Biology What are polypeptides? A polypeptide is defined as a polymer of amino acids joined together... Read More
Amphipathic
Amphipathic Definition Amphipathic is a word used to describe a chemical compound containing both polar (water-soluble) and... Read More
Transmembrane protein
Definition noun, plural: transmembrane proteins A protein that spans the entire biological... Read More
Rough endoplasmic reticulum
Definition noun plural: rough endoplasmic reticula (cell biology) A type of endoplasmic reticulum wherein polyribosomes... Read More
Genetic Information and Protein Synthesis
Genetic Code Genes are sequences of DNA nucleotides that carry and transmit the information specifying amino acid sequences... Read More
Resting potential
Resting Potential Definition The resting potential of a cell is defined as the difference in electrical potential across... Read More
Concentration gradient
Concentration gradient definition Concentration gradient refers to the gradual change in the concentration of solutes in a... Read More
Phosphorylation
Phosphorylation Definition We can define phosphorylation as a biochemical process in which a phosphate molecule is added to... Read More
Transmembrane proteins
transmembrane protein (Science: cell biology) A protein subunit in which the polypeptide chain is exposed on both sides of... Read More
Pinocytosis
Pinocytosis Definition What is pinocytosis? Pinocytosis is the ingestion of extracellular fluids, i.e. the fluid... Read More
Smooth endoplasmic reticulum
Smooth Endoplasmic Reticulum Definition Smooth endoplasmic reticulum (sER) is (a part of) endoplasmic reticulum that is... Read More
Simple diffusion
Simple Diffusion Definition What is simple diffusion? In biology, simple diffusion is a form of diffusion that does not... Read More
Active transport
Active transport is a type of cellular transport in which substances (e.g. ions, glucose, and amino acids) are transported... Read More
Simple squamous epithelium
Simple Squamous Epithelium Definition Simple squamous epithelium, also known as simple squamous epithelial tissue or... Read More
Endocytosis
Endocytosis Definition What is endocytosis in biology? Endocytosis is a cellular process by which a cell internalizes any... Read More
Chlorophyll
Why are most plants green? Have you ever had the same question? Perhaps, you’ve been told that the plants are green... Read More
Cell adhesion
Cell Adhesion Definition Cell adhesion is the process in which a cell uses a specialized complex of proteins to get... Read More
Signal sequence
Definition noun A sequence of amino acid residues bound at the amino terminus of a nascent protein during protein... Read More