B1.2 OCR Biology definitions

chromosome

• enzyme for carbohydrates

• long molecule of DNA

• colourful DNA

gene

• where a reaction takes place in an enzyme

• something you wear on your legs

• short section of DNA that codes for a characteristic like eye colour

nucleotide

• the centre of the atom

• small unit that makes up DNA

• the brain of the cell

polymer

• molecule made of many smaller molecules joined together

• used to fill in walls

• binds to an enzyme

complementary base pairing

• the way bases bond together in DNA (Adenine to Thymine and Guanine to Cytosine)

• the way people are matched on dating apps

• they way people run round the rounders pitch

double helix

• a new chocolate bar

• the shape of DNA

• an enemy of Doctor Who

enzyme

• biological catalyst

• a new planet

• the leaf of a plant

catalyst

• something found in car exhausts

• something that speeds up a reaction

• a genetically engineered cat that can write shopping lists for you

active site

• place where people keep fit

• place on an enzyme, specially shaped so the substrate can bind to it

• somewhere workmen put up buildings

substrate

• molecule that binds to an enzyme

• passageway under a road

• an underground train