Search Results for: structure
Cell Structure
The interior of human cells is divided into the nucleus and the cytoplasm. The nucleus is a spherical or oval-shaped... Read More
Secondary structure
Definition noun A structure of a biological molecule characterized by the local folding within the biopolymer as a result... Read More
Primary structure
Definition noun (biochemistry) A structure of a biological molecule in which there is a precise sequence or order of... Read More
Quaternary structure
Definition noun A structural level wherein several proteins (or polypeptide subunits) interact through non-covalent bonds to... Read More
Polypeptide
Polypeptide Definition Biology What are polypeptides? A polypeptide is defined as a polymer of amino acids joined together... Read More
DNA Structure & DNA Replication
Previous pages in this tutorial have described the basics of a cell, the energy required by these cells and how energy is... Read More
Analogous structures
Analogous Structures Definition In evolutionary biology, analogous structures are biological structures having similar or... Read More
Nucleosome
Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More
Silent mutation
A mutation is a change in the nucleotide sequence of a gene or a chromosome. When there is only one nucleotide involved, it... Read More
Chromosome
Chromosomes Definition Chromosomes are thread-like structures present in the nucleus of plant and animal cells. Chromosomes... Read More
Cell membrane
Cell Membrane Definition Just like any non-living body possesses a plastic or paper packaging material that keeps the... Read More
Fluid mosaic model
Fluid Mosaic Model Definition What is the fluid mosaic model? The fluid mosaic model is a three-dimensional representation... Read More
Saccharide
Saccharide Definition What is a saccharide molecule? A saccharide is the unit structure of carbohydrates. In biochemistry,... Read More
Stem and loop structure
stem and loop structure (Science: molecular biology) The structure of tRNAs is so termed because it has four base paired... 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
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
Selectively-permeable membrane
Selectively Permeable Membrane Definition We can define selectively permeable membranes as those that are selectively... Read More
Morphology
Morphology Definition Morphology means the study of the shape and structure of living things from a biological perspective.... Read More
Sarcolemma
Sarcolemma Definition What is the sarcolemma? It is the thin, transparent, extensible plasma membrane of the muscle cell.... Read More
Denaturation
Denaturation Definition In biochemistry, denaturation is defined as a process in which a molecular structure deviates from... Read More
Community (biology)
Community, in biology, refers to the assemblage of interacting organisms (either of the same or different species)... 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
Angiosperm
Angiosperms Definition What is an angiosperm? An angiosperm is a plant that produces flowers. The angiosperms, also... Read More
Phospholipid
What is a phospholipid? Phospholipids are a subgroup of lipids. Other major types of lipids are fatty acids, sphingolipids,... Read More
Diarthrodial joint
What is a diarthrodial joint? A diarthrosis joint is a freely moving joint characterized by its mobility and joint cavity... Read More
Osseous tissue
What Is Bone Or Osseous Tissue? Osseous tissue is the structure providing, hard and mineralized connective tissues. Osseous... Read More