Gel electrophoresis is a separating technique that is usually used in the laboratory to separate DNA fragments on the basis of their sizes. DNA are typically loaded into one side of the gel called the well and electric force will be applied to separate the fragments. DNA fragments with more base pairs are found near the sample well compare to the anode because larger DNA fragments are not able to move through the gel at a faster rate like the ones with few number of base pair. Because DNA are negatively charged they move toward the anode, but all DNA fragments have the same amount of charge per mass, thus, small fragments move faster away from the well.
Mycobacterium, characterized by a thick lipid layer composed of mycolic acid
The bonds that hold the two chains of an insulin molecule together are two disulfide bonds.
Insulin molecule is made up of two peptide chains. These chains are referred to as the A and B chains. The A and B chains are help together by the two disulfide bonds present between them. The A chain has an additional disulfide bond inside it. The A chain is 21 amino acids long and the B chain is 30 amino acids long in most of the species.
I’d choose C but biology was a bit ago
