| Date | November 2019 | Marks available | 1 | Reference code | 19N.3.SL.tz0.15 |
| Level | Standard Level | Paper | Paper 3 | Time zone | time zone 0 |
| Command term | List | Question number | 15 | Adapted from | N/A |
Question
List one enzyme responsible for the digestion of proteins.
[1]
a.
Outline the absorption of amino acids from the intestinal lumen into the capillary network.
[3]
b.
Markscheme
pepsin
OR
trypsin ✔
a.
amino acids cross the brush-border membrane ✔
channel is required in the apical membrane/ amino acids are transported by active transport ✔
pass through the cytosol of the absorptive cell ✔
cross the basolateral membrane ✔
b.
Examiners report
[N/A]
a.
[N/A]
b.
