Question

DNA fingerprinting is used: *

1 point
to provide a means of identifying identical DNA sequencdes.
as a forensics tool to provide evidence in a criminal case.
to identify genetic diseases.
to isolate fragments of DNA for sequencing.
for all of the above.
Fragments cut by most restriction enzymes have: *
1 point
complementary double-stranded ends.
supplementary single-stranded ends.
double-stranded "sticky" ends.
complementary single-stranded ends.
supplementary double-stranded ends.
Which principle(s) allow gel electrophoresis to analyze DNA? *
1 point
DNA is generally positively charged due to its nitrogenous bases, so an electrical field forces it to move toward the negative pole.
Gravity.
The strong positive charges from the phosphate groups in the DNA backbone cause it to migrate toward the negative pole.
Diffusion.
The strong negative charges from the phosphate groups in the DNA backbone cause it to migrate toward the positive pole.

Answer 1

All for the above

Supplementary single stranded endsdiffustion

Answer 2

1.) For all of the above

2.) supplementary single-stranded ends.

3.) The strong negative charges from the phosphate groups in the DNA backbone cause it to migrate toward the positive pole.