1.
a) Correct
b) Correct
c) Incorrect - DNA moves toward the positive electrode because it is negatively charged.
d) Incorrect - The speed depends on size; smaller fragments move faster.
e) Correct
f) Correct
g) Incorrect - Each band represents a fragment of a specific size, not necessarily from each sample.
2. Fragment A is 500 base pairs. This is determined by comparing its position to the ladder bands: it aligns with the 500 bp marker.
3. No, DNA fragments are not the same size. They separate into distinct bands based on size during electrophoresis.
4. Fragments B, C, D, and E are not the same size as Fragment A (500 bp) or Fragment F (1000 bp). Their positions on the gel show they migrated different distances, indicating different sizes.
Parent Tip: Review the logic above to help your child master the concept of gel electrophoresis worksheet.
