DP Biology (last assessment 2024)
Question 18M.3.SL.TZ2.17
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.3.SL.TZ2.17 |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Explain | Question number | 17 | Adapted from | N/A |
17.
[Maximum mark: 3]
18M.3.SL.TZ2.17
The bar chart indicates that both males and females in the US eat, on average, less fibre than is recommended.
Explain the importance of dietary fibre.
[3]
Markscheme
a. ensure correct transit rate / movement of food through the intestines
b. avoid constipation / difficulty in empty bowels / difficulty in egestion
c. correct levels of water reabsorbed
d. avoid overlong exposure to fat soluble chemicals
e. decreased risk of colon cancer/hemorrhoids/appendicitis
f. decreases the rate of absorption of glucose
g. decreases hunger so less obesity/diabetes
Examiners report
