F4 C5 Revision (OQ) 5.2

All enzymes are proteins.

• True

• False

Most intracellular enzymes work best in neutral conditions.

• True

• False

Extracellular enzymes work inside the cell.

• True

• False

The reaction of enzymes takes place at the active site on the enzyme molecule.

• True

• False

Enzymes are changed at the end of chemical reaction.

• True

• False

The rate of enzyme reaction depends on the temperature and light intensity.

• True

• False

Enzymes are destroyed by heat because enzymes, being proteins, are denatured at high temperatures.

• True

• False

The limiting factor for the effect of substrate concentration on the rate of enzyme reaction is enzyme concentration.

• True

• False

Based on the 'lock and key' hypothesis, an enzyme is the key and a substrate is the lock.

• True

• False

Inhibitors are substances that can slow down and stop the enzyme reaction.

• True

• False