DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ2.d
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.hl.TZ2.d |
| Level | hl | Paper | 3 | Time zone | TZ2 |
| Command term | Describe | Question number | d | Adapted from | N/A |
d.
[Maximum mark: 1]
19M.3.hl.TZ2.d
Phosphatidylcholine is an example of a phospholipid found in lecithin.
Phospholipids are also found in lipoprotein structures.
Describe one effect of increased levels of low-density lipoprotein (LDL) on health.
[1]
Markscheme
Any one of:
atherosclerosis/cholesterol deposition «in artery walls» [✔]
increases risk of heart attack/stroke/cardiovascular/heart disease/CHD [✔]
Note: Accept “arteries become blocked/walls become thicker”, “increases blood pressure”, or “blood clots”.
Do not accept “high cholesterol”.
Examiners report
Candidates were required to state one effect of increased LDL. Majority of the candidates scored well on this part. High cholesterol is not an acceptable answer but was frequently seen.
