| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ2.26 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 26 | Adapted from | N/A |
Question
What are introns?
A. Sequences of nucleotides that are removed to form mature RNA in eukaryotes
B. Sequences of nucleotides that are removed to form mature RNA in prokaryotes
C. Sequences that remain in mature RNA after exons have been removed
D. Small pieces of circular DNA that are found in prokaryotes
Markscheme
A
Examiners report
N/A
