DEFINITIONS:1.4Enzymes and Biological reactions

Question 1

Metabolism

Answer 1

All the organism’s chemical processes comprising anabolic and catabolic pathways

Question 2

Metabolic pathway

Answer 2

A sequence of enzyme-controlled reactions in which a product of one reaction is a reactant to the next

Question 3

Enzyme

Answer 3

A biological catalyst; a protein made by cells that alters the rate of a chemical reaction without being used up by the reaction

Question 4

Catalyst

Answer 4

An atom or molecule that alters the rate of a chemical reaction without taking part in the reaction or being changed by it

Question 5

Enzyme-substrate complex

Answer 5

Intermediate structure formed during an enzyme-catalysed reaction in which the substrate and enzyme bind temporarily, such that the substrates are close enough to react

Question 6

Induced fit

Answer 6

The change in shape of the active site of an enzyme, induced by the entry of the substrate, so that the enzyme and substrate bind closely

Question 7

Activation energy

Answer 7

The minimum energy that must be put into a chemical system for a reaction to occur