| Date | November 2013 | Marks available | 1 | Reference code | 13N.1.HL.TZ0.40 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 40 | Adapted from | N/A |
Question
What is secreted after implantation of the blastocyst in the uterine wall?
A. Estrogen which stimulates the degeneration of the corpus luteum
B. HCG which prevents the degeneration of the corpus luteum
C. Estrogen which prevents the degeneration of the corpus luteum
D. HCG which stimulates the degeneration of the corpus luteum
Markscheme
B
Examiners report
Thank you to those who spotted the new HGC hormone in place of HCG. Fortunately the candidates were not put off by this with over two thirds gaining the mark.
