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 organize and use data in a computer.

To demand that someone does something.

Telling someone off for doing something wrong. To give a talk or speech about a subject.

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

Useful; not just for decoration.

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 switch from a religion, belief etc. to another.

Act or process of growing bigger or more advanced.

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.