substance produced by living organism which acts as catalyst to bring about specific biochemical reaction. Substance in living things helping chemical change.

written or printed representation of something.

series of actions towards achieving something. Sets of changes that occur slowly and naturally. To adopt a set of actions that produce a result.

need for particular purpose.

Telling someone off for doing something wrong. give lecture.

medicine that inhibits growth of or destroys microorganisms. Medicines that kill bacteria to fight infections.

of or having special activity or purpose.

changing text from one language to another; the process of changing something into a different form.

action or process of making something active or operative.

Be controlled or determined by..

Person switching from one belief system to another. To change form, character, or function to another.

process of developing or being developed.

way that constitutes or serves as path.

Substance which is one of the fundamental constituents of the nucleus of the cell and which forms the supports of the hereditary message.

(of shooting) carried out to protect exposed person from enemy. thing used to protect, decorate, or conceal something else. To include something within an agreed limit.