Supplement Amphipathic is an adjective describing a molecule which has both polar and nonpolar regions. (physics and chemistry) The smallest unit of an element or compound, made up of two or more atoms held together by strong chemical bond. molecular biologist n. Molecule definition is - the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms. Atoms forming compounds form ionic or covalent bonds. Molecules are made up of atoms that are held together by chemical bonds. Amphipathic Definition. Polarity is a description of how different the electrical poles of a molecule are. If they are highly different, it can be said that the species is a highly polar molecule. (biology or biochemistry) An extremely small particle or substance, especially at cellular or structural level, as a biomolecule. In other words, the electrons will spend more time … Molecule: A compound is a group of atoms of different elements held together by chemical bonds. A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Hydrogen gas (or H 2 ) is a small molecule … The field of molecular biology involves many other areas of biology such as biochemistry and genetics. Molecules are distinguished from ions by their lack of electrical charge.. n. The branch of biology that deals with the structure, function, and manipulation of nucleic acids and proteins. molecular biology synonyms, molecular biology pronunciation, molecular biology translation, English dictionary definition of molecular biology. Definition noun, plural: molecules A tiny or a very small piece (of something). Fully revised and updated, this new edition includes definitions of terms from the fields of Bioinformatics, Biophysics, Cell Biology, Chemistry… There are mostly covalent bonds between the atoms of the molecules. Molecule Definition A molecule is two or more atoms bonded together to form a single chemical entity. You can predict whether a molecule will be polar or nonpolar by looking at the type of chemical bonds formed between the atoms of the elements. A molecule is a group of two or more similar or dissimilar atoms that are held together by chemical bonds. A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. The number of molecules in one mole is the same for all substances; this number is known as Avogadro’s number (6.022140857 × 10 23). In the kinetic theory of gases, the term molecule is … How to use molecule in a sentence. The molecular weight of a molecule is the sum of the atomic weights of its component atoms. Molecular biology: The study of biology on a molecular level including the structure, function, and makeup of biologically important molecules such as DNA, RNA, and proteins. Polar Molecule Definition. Molecule Jump to: navigation, search For the scientific journal, see Molecules (journal). Define molecular biology. If there is a significant difference between the electronegativity values of the atoms, the electrons won't be shared equally between the atoms. ‘the book is almost an encyclopedia. These bonds form as a result of the sharing or exchange of electrons among atoms. If a substance has molecular weight M, then M grams of the substance is termed one mole. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions.. A polar molecule is a chemical species in which the distribution of electrons between the covalently bonded atoms is not even. Some chemical species, such as chains … The atoms of certain elements readily bond with other atoms to form molecules. It is comprehensive, thorough, clear, and accurate’ - TIBSThe Oxford Dictionary of Biochemistry and Molecular Biology provides a comprehensive survey of modern biochemistry and molecular biology. Each atom carries a certain number of electrons that orbit around the nucleus.The nucleus consists of protons and neutrons, of different numbers in different elements.. Because of this, water interacts with the various regions in different ways. What Determines Polarity? The number of atoms and types of atoms that bond together to form a molecule determine the size and shape of the molecule. Of electrons between the atoms of certain elements readily bond with other atoms to form a which... Of its component atoms single chemical entity of certain elements readily bond with molecule definition biology atoms form... 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