Question 18N.3.sl.TZ0.5
| Date | November 2018 | Marks available | [Maximum mark: 4] | Reference code | 18N.3.sl.TZ0.5 |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | Explain, State, Suggest | Question number | 5 | Adapted from | N/A |
Dietary recommendations are made by scientists.
The formation of proteins from amino acids is an example of an anabolic reaction in the human body.
State the source of energy for such a synthetic reaction.
[1]
catabolism «of food/nutrients»
OR
«cellular» respiration ✔
Accept “ATP” but not “burning of food/nutrients”.
Suggest why it is advisable for those living in northerly or southerly latitudes (that is away from the equator) to take vitamin D supplements during the winter.
[1]
not enough sunlight/UV light «for synthesis of vitamin D in the skin» ✔
Explain how a xenobiotic is biomagnified.
[2]
cannot be metabolized/broken down
OR
not biodegradable
OR
accumulates in lipid/fat tissues ✔
increased concentration as one species feeds on another «in the food chain» ✔
