DP Biology (last assessment 2024)
Question 19M.2.SL.TZ1.8b
| Date | May 2019 | Marks available | [Maximum mark: 4] | Reference code | 19M.2.SL.TZ1.8b |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Outline | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 4]
19M.2.SL.TZ1.8b
(b)
Outline the role of amylase in digestion in humans.
[4]
Markscheme
a. amylase is an enzyme ✔
b. secreted by salivary glands/pancreas ✔
c. active/released into the mouth/small intestine ✔
d. acts on starch/polysaccharides ✔
e. breaks «glycosidic» bond by hydrolysis/adding water ✔
f. converts insoluble/large molecule to soluble/small molecules ✔
g. product is maltose/disaccharide/sugar molecule ✔
Examiners report
The name, location and correct function of the enzyme was very common making 3 max the most common marks. Students who got fewer marks gave generic explanations of the process of digestion. Some students made incorrect references to amylase digesting proteins. A few candidates ignored amylase and discussed digestion in general.
