DP Biology (last assessment 2024)
Question 19M.1.HL.TZ2.22
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.HL.TZ2.22 |
| Level | HL | Paper | 1 | Time zone | TZ2 |
| Command term | Deduce | Question number | 22 | Adapted from | N/A |
22.
[Maximum mark: 1]
19M.1.HL.TZ2.22
Two restriction endonucleases (EcoRI and BamHI) were used to cut a DNA sample into smaller fragments. These were then subjected to gel electrophoresis and the results are shown. The lengths of the DNA fragments are measured in kilobases (kb). One kilobase is 1000 DNA bases.
[Source: © International Baccalaureate Organization 2019]
Which statement is supported by the data?
A. The DNA sample is approximately 16 kb in size.
B. Each endonuclease produces a 2 kb fragment.
C. Both endonucleases produce the same number of fragments.
D. The fragments produced using both endonucleases are all different from those produced by the individual endonucleases.
[1]
Markscheme
A
