DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ2.e
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.3.sl.TZ2.e |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Describe | Question number | e | Adapted from | N/A |
e.
[Maximum mark: 2]
19M.3.sl.TZ2.e
Phosphatidylcholine is an example of a phospholipid found in lecithin.
Phospholipids are also found in lipoprotein structures.
Describe two effects of increased levels of low-density lipoprotein (LDL) on health.
[2]
Markscheme
atherosclerosis/cholesterol deposition «in artery walls» [✔]
increases risk of heart attack/stroke/cardiovascular disease/CHD [✔]
Note: Accept “arteries become blocked/walls become thicker”, “increases blood pressure”, or “blood clots”.
Do not accept “high cholesterol”.
Examiners report
Students were required to state two effects of increased LDL. High cholesterol is not an accepted answer but still frequently seen. Many students also repeated similar answers that could not receive the same mark.
