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Usage of the term to describe large molecules varies among the disciplines. For example, while biology refers to macromolecules as the four large molecules comprising living things, in chemistry , the term may refer to aggregates of two or more molecules held together by intermolecular forces rather than covalent bonds but which do not readily ...
M phase See mitosis. macromolecule Any very large molecule composed of dozens, hundreds, or thousands of covalently bonded atoms, especially one with biological significance. . Many important biomolecules, such as nucleic acids and proteins, are polymers consisting of a repeated series of smaller monomers; others such as lipids and carbohydrates may not be polymeric but are nevertheless large ...
A polymer (/ ˈ p ɒ l ɪ m ər / [4] [5]) is a substance or material that consists of very large molecules, or macromolecules, that are constituted by many repeating subunits derived from one or more species of monomers. [6] Due to their broad spectrum of properties, [7] both synthetic and natural polymers play essential and ubiquitous roles ...
All of these contain many chemical bonds, but are not made of identifiable molecules. No typical molecule can be defined for salts nor for covalent crystals , although these are often composed of repeating unit cells that extend either in a plane , e.g. graphene ; or three-dimensionally e.g. diamond , quartz , sodium chloride .
Organic compounds are molecules that contain carbon bonded to another element such as hydrogen. [33] With the exception of water, nearly all the molecules that make up each organism contain carbon. [33] [34] Carbon can form covalent bonds with up to four other atoms, enabling it to form diverse, large, and complex molecules.
Three scientists were jointly awarded this year's Nobel Prize in chemistry on Wednesday for developing a way of “snapping molecules together” that can be used to design better medicines.
The Joel Schumacher film may not seem “made for children” at first glance, especially given the PG-13 rating, but compared to some other films following Bruce Wayne’s tragic story, it takes ...
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...