DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ1.c
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.3.sl.TZ1.c |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 2]
19M.3.sl.TZ1.c
The main fatty acid composition of cocoa butter and coconut oil is detailed below.
The addition of partially hydrogenated cocoa butter to chocolate increases its melting point and the content of trans-fatty acids (trans-fats).
Outline two effects of trans-fatty acids on health.
[2]
Markscheme
Any two of:
«increased risk of» coronary/heart disease [✔]
«increased risk of» stroke [✔]
«increased risk of» atherosclerosis [✔]
«increased risk of type-2» diabetes [✔]
increase in LDL cholesterol [✔]
decrease in HDL cholesterol [✔]
«increased risk of» obesity [✔]
Examiners report
Almost all students were aware of negative health effects of trans-fats, though quite a few lost marks by just stating “cholesterol” without specifying HDL or LDL.
