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This is a topic which is common across all A-Level specifications, the questions surrounding this topic may vary from labelling diagrams, matching features in a table, or longer written styles of question...

The main component of primary protein structure is that it is composed of amino acids. 

The amino acids are connected via covalent chemical bonds more specifically called the peptide bond.

A...

The vaccine contains a weakened or inactivated form of the virus. The viral particle displays an antigen on its surface specific to poliovirus. Once in the blood, a specific helper T cell will detect the ...

Primary structure - a sequence of amino acids in a polypeptide chain. They are joined together by peptide bonds. The sequence of amino acids determines the rest of the proteins structures. Secondary struc...

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Sickle-cell anaemia is an inherited condition caued by a dominant allele.

Sickle cell anaemia is a disorder of the blood caused by an inherited abnormal haemoglobin the abnormal h...