| Date | May 2019 | Marks available | 2 | Reference code | 19M.3.HL:.tz0.19 |
| Level | Higher Level | Paper | Paper 3 | Time zone | time zone 0 |
| Command term | Explain | Question number | 19 | Adapted from | N/A |
Question
List the enzymes that are responsible for the digestion of carbohydrates in the mouth and small intestine.
[2]
a.
Explain the need for enzymes in digestion.
[2]
b.
Markscheme
Mouth:
salivary amylase;
Small intestine:
pancreatic amylase.
Award [1 max] for each.
[2]
a.
they operate as a catalyst/speed up reactions;
they are specific to the macronutrient that they work on «eg amylase helps with the breakdown of CHO»;
they increase the solubility of the food for absorption/diffusion.
[2 max]
b.
Examiners report
Few students got 2 marks; they missed out on pancreatic amylase.
a.
Well done on the whole.
b.
