colourless crystalline compound. Any of several bases that are derivatives of purine; a colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances.

To guide or explain something, e.g. a town.

likely or prone to be affected by. conditionally upon. person or thing that is being discussed, described, or dealt with. To cause to suffer or experience something.

salt or ester of phosphoric acid. Salt of phosphoric acids.

Clearly different in nature from something else.

To hold something inside something else.

begin or be reckoned from particular point in time or space.

The way in which the parts of a system or object are arranged or organized, or a system arranged in this way. construct or arrange according to plan.

way that constitutes or serves as path.

having acquired much knowledge through study. To get knowledge or skills by study or experience.

expressive. Idea or thing represented by words or sentences. To express a particular idea or thought.

assembled or made from whatever is available, and so unlikely to be of highest quality. mark or wound made by scratching. score or mark surface of something with sharp or pointed object.

compound consisting of nucleoside linked to phosphate group.

Careful plan or method for achieving a goal. Branch of military dealing with command.

very successful, authoritative, and commanding great respect. To make something clearly different from others.