Question

A benign tumor __. O is cancerous. O is capable of metastasis. O is always harmless. O is malignant. O is the result of uncontrolled cell division.

Answer 1

1. A benign tumor is the result of uncontrolled cell division.

Benign tumor does not invade nearby tissue or spread to other parts of the body the way cancer can. In most cases, the outlook with benign tumors is very good. But benign tumors can be serious if they press on vital structures such as blood vessels or nerves. Malignant tumors are cancerous, capable of metastasis, and always harmful.

2. Sample 1 is larger in mass as compared to sample 2.

Gel electrophoresis is a technique used to separate DNA fragments according to their size. DNA samples are loaded into wells (indentations) at one end of a gel, and an electric current is applied to pull them through the gel. DNA fragments are negatively charged, so they move towards the positive electrode. Because all DNA fragments have the same amount of charge per mass, small fragments move through the gel faster than large ones.