There are dash biologically important ones and they are joined together by bonds called dash bonds

Organic molecules: are biologically important ones.All macro molecules are made up of simple molecules (monomers) that are bounded by specific bonds .Biologicaly important molecules are proteins ,fats ,carbohydrstes and nuclic acid.All these molecules are formed by condensation of monomers.

proteins: Proteins are made up polymers of amino acids. Aminoacids ae joined together by peptide bond.

A peptide bond is a chemical bond formed between two amino acid molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule and  releasing a molecule of water (H2O).

Carbohydrates: are biological important one are made up of    monosaccharides and the are joined together by glycosidic bond.

Fats: are made up of fatty acids are joined together by covalent bonds called ester bond . Saturated fatty acids are bound by single anu unsaturated are made up of double or triple bonds.

Nucleic acid: are made up of nucleotides .Nucleotides are joined together  by chemical bond called hydrogen bond.It is formed between the phosphate group of one nucleotide and the sugar of a neighboring nucleotide holds the backbone together.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.