Enzymes

Question 1

1. Oxidase is an enzyme that catalyzesoxidationreductiondehydrationhydrolysis

Answer 1

oxidation

Question 2

1. Dehydrogenase is the enzyme that catalysesthe removal of waterthe removal of hydrogen groupsthe removal of oxygen

Answer 2

the removal of hydrogen groups

Question 3

1. Enzyme activity is affected by pH and temperature.
   True
   False

Answer 3

True

Question 4

1. Apple browning means apples turn brown in the presence of oxygen. Such process is catalysed by enzymes. In order to prevent browning, apples can be put into hot water. Based on your knowledge about enzyme properties, this method works becausehot water changes the pHhot water denatures the enzymeshot water destroys the brown particles formedhot water is an enzyme inhibitor

Answer 4

hot water denatures the enzymes

Question 5

1. Referring to Question 4, another method to prevent browning is to smear apple with a layer of vinegar oil. Based on your knowledge about enzyme properties, this method works becausevinegar can increase the temperature to denature the enzymesvinegar can alter the pH to denature the enzymes

Answer 5

vinegar can alter the pH to denature the enzymes

Question 6

1. An example of catabolism would beforming cellulose from glucose.the light-independent reactions of photosynthesisanaerobic respirationtransport across membranes

Answer 6

anaerobic respiration

Question 7

1. Enzymes, as catalysts, Blank 1 the activation energy and thus speed up the overall reaction.

Answer 7

lower

Question 8

1. The Blank 1 model is the latest theory/ model in explaining the mechanism of enzyme reactions.

Answer 8

Induced fit