DP Biology (last assessment 2024)
Question 18N.3.SL.TZ0.b
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.3.SL.TZ0.b |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 1]
18N.3.SL.TZ0.b
A section of mRNA contains the start codon for translation of a polypeptide by the ribosomes.
State the chemical difference between the 5' end and the 3' end of a DNA strand.
[1]
Markscheme
5′ end contains a phosphate group «on carbon 5»
OR
3′ carbon contains a hydroxyl/OH group «on carbon 3» ✔
