DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ2.c
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.sl.TZ2.c |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Outline | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 2]
18M.3.sl.TZ2.c
Amino acids are the building blocks of proteins.
Outline why amino acids have high melting points.
[2]
Markscheme
form zwitterions
«strong» ionic bonding
OR
«strong» ionic lattice
OR
«strong» electrostatic attraction/forces
Do not accept hydrogen bonding or IMFs for M2.
[2 mark]
