Structure of proteins

The structure and arrangement of polypeptide chains affects the spatial structure of...

Covalent bonds in benzene molecules

In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.

RNA

A polynucleotid made up of phosphoric acid, ribose, and nucleobases (cytosine, uracil,...

Oil refinery

The products of oil refining include diesel oil, petrol and lubricants.

Conformations of ethane

The staggered conformation of ethane is more stable than the eclipsed conformation.

Secondary structure of proteins

Polypeptide chains are composed of amino acids and can appear in alpha-helix or...

Oil molecule

Triglycerides containing unsaturated fatty acids are liquid at room temperature.

Fat molecule

Three saturated fatty acid molecules linked to a glycerol molecule.

Optical isomerism

Mirror image isomers of asymmetrical shapes and solids are non-superimposable.

Fullerene (C₆₀)

A crystalline allotrope of carbon which was discovered at the end of the 1980s.

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