Question 19M.3.HL.TZ1.22c.ii
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.HL.TZ1.22c.ii |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Distinguish | Question number | c.ii | Adapted from | N/A |
Water in a calorimeter is heated by burning food in oxygen. The temperature change of the water is used to calculate the energy value of the food. An experiment was set up to calculate the energy value of avocado.
[Source: © International Baccalaureate Organization 2019]
Avocados are known to be a good source of dietary fibre and contain all the essential amino acids. Distinguish between essential and non-essential amino acids.
[1]
essential amino acids must be included in the diet and the body cannot make them «whereas the body can synthesize non-essential amino acids» ✔
Credit required two pieces of information about synthesis of amino acids and whether or not they were necessary components in a balanced diet. Hence few candidates gained credit as they only included one of these in their responses.
