Enzymes

Select the incorrect statement regarding enzymes

• Enzymes are biological catalyts

• enzymes attach to the active site of substrates

• enzymes denature at high temperatures

• increased enzymes increases rate of reaction

Select the correct options.

Enzymes increase rate of reaction by

• holding substrates in the correct orientation

• putting pressure on bonds of substrates

• binding with more than one substrate to increase efficiency

• move chemicals and substances at a faster rate

Without enzymes

• activation energy isn't decreased

• activation energy is increased

• more energy is supplied to the reaction

• activation energy remains unchanged

The process of an enzyme producing a new substrate from more than one substrate is

• enzymatic synthesis

• enzyme mediated

• catabolic

• anabolic

The process of an enzyme producing multiple substrates from one substrate is

• enzymatic synthesis

• enzyme mediated

• catabolic

• anabolic

A folded protein becomes unravelled and unfolded through a process called

• destabilisation

• anabolism

• catabolism

• denaturation

A substance that reduces the action of an enzyme is called a

• preventer

• stopper

• inhibitor

• reducer

A molecule joins an enzymes and changes the shape of the enzyme's active site. This is

• competitive inhibition

• non-competitive inhibition

• inhibition

• simultaneous inhibition

Low temperatures slow enzymes by

• reducing the available energy of the enzyme

• reducing collisions

• increasing collision rate

• changing the shape of the active site

select the correct options

sub-optimal pH and high temperature can change rate of reaction through

• decreasing rate of reaction

• denaturing the enzyme

• changing the active site shape

• increasing collision rate and therefore reducing rate of reaction