Chemistry basis and HoL

Carbohydrate

A biological molecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms. They provide short term energy storage and provide unique identification for cells. Examples are sugar, cellulose, chitin and starch.

Covalent bond

A chemical bond that involves the sharing of electron pairs between atoms.

Protein

A large biological molecule composed of amino acids. They form cell structures and carry out most of the functions in a cell. Examples include all enzymes, muscle fibers, collagen (skin), and keratin (finger nails, hair).

Lipid

A large biological molecule made up of fatty acids that don't dissolve in water. Forms cell membranes and provides long term energy storage. Examples include fats, waxes, and cholesterol.

Nucleic acid

A large biological molecule made up of nucleotides. Examples are DNA and RNA which store genetic information.

Ionic bond

A type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Macromolecule (Biomolecule)

A very large molecule, such as protein, commonly created by polymerization of smaller subunits (monomers). They are sometimes composed of thousands or more atoms.

Atom, molecule, macromolecule, organelle, cell, tissue, organ, organ system, organism (All My Many Old Clothes Tear Often x3).

Name the levels in the hierarchy of life from atoms to organisms. (AMMOCTOx3)

Molecule

The smallest particle in a chemical compound. These particles are made up of two or more atoms that are held together by chemical bonds.

Atom

The smallest unit of ordinary matter that has the properties of a chemical element.

Hydrogen bond

The attractive force between the hydrogen of one molecule and an electronegative atom of a different molecule.