DP Biology (last assessment 2024)
Question 18M.3.HL.TZ2.21d
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.3.HL.TZ2.21d |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Outline | Question number | d | Adapted from | N/A |
d.
[Maximum mark: 3]
18M.3.HL.TZ2.21d
(d)
Outline the stages involved in the recycling of erythrocytes by the liver.
[3]
Markscheme
a. phagocytosis of erythrocytes by Kupffer cells
b. hemoglobin is split into globin and heme group
c. globin is re-used in protein synthesis
d. heme group broken down into iron and bilirubin
e. iron is carried back to the bone marrow «to produce new hemoglobin/erythrocytes»
