C. <span>All arteries and veins contain three
layers. The innermost layer is called the tunica intima. The muscular
middle layer is called the tunica media, and the outermost layer is
called the tunica adventitia. Because capillaries are only one cell
layer thick, they only have a tunica intima. </span><span> </span>
Bacterial ribosme has a 16S rRNA which has region that binds to the Delgano and Shine sequence of the mRNA which is first binding site of the initiation AUG, before the complete assembling of fMet and ribosome.
Once the assembling of ribosome and FMet copleted and initiate making protein all other AUG sequence bind to tRNA for a methionine in the middle of a protein.
It matters because it prevent fMET from being incorporate other than initiation site with the help of formy group on the amino Met of methionine.
DNA is negatively charged. When an electrical current is passed through a gel, the DNA is repelled by the nearby negative current and pushed across the gel towards the positively charged side.
Electrophoresis has become a standard molecular biology technique. This technique is based on the use of a constant-uniform electric field that enables the separation and identification of DNA fragments with different lengths, which form bands in the electrophoresis gel. Electrophoresis can be used to analyze not only DNA, but also RNA and proteins. During electrophoresis, the fragments of DNA that are negatively charged will migrate towards the positively charged electrode, where the duration of this movement will depend on the size of the DNA fragment, as well as of the pore size in the gel.