| Date | November 2018 | Marks available | 3 | Reference code | 18N.3.SL.tz0.13 |
| Level | Standard Level | Paper | Paper 3 | Time zone | time zone 0 |
| Command term | Describe | Question number | 13 | Adapted from | N/A |
Question
List two enzymes that are responsible for the digestion of proteins from the mouth to the small intestine.
1.
2.
[1]
a.
Describe the function of enzymes in macronutrient digestion.
[3]
b.
Markscheme
pepsin ✔
trypsin ✔
Two required in list to award [1] mark.
a.
a catalyst for the breakdown of large food molecules into smaller molecules ✔
smaller molecules are more soluble ✔
substances, which can be absorbed from the gut into the bloodstream ✔
speed up the rate of digestion ✔
carbohydrates are acted on by amylase ✔
OR
proteins are acted on by pepsin ✔
OR
fats are acted on by lipase ✔
Award 1 [max] for specific example.
Accept other relevant examples.
b.
Examiners report
Well prepared.
a.
Depth issue again.
b.
