Does facilitated diffusion require a protein channel? Facilitator Publishing. Some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help crossing the hydrophobic nucleus. In facilitated diffusion, molecules diffuse across the plasma membrane with the help of transmembrane proteins, such as channels and transporters. What does facilitated … Read more
Michigan’s iconic shape is carved out by four of the Great Lakes: Superior, Huron, Erie and Michigan. The Great Lakes, including Lake Ontario which doesn’t touch Michigan, account for one fifth of the world’s supply of surface fresh water. Michigan’s name is even rooted in the Ojibwa word for “large lake,” Michi Gami. How many … Read more
Although they are perennial in a warmer climate, most gardeners treat them as annual flowers. Tuberous begonias are probably the second-most popular outdoor begonia for gardeners. These grow from underground tubers into upright or trailing plants with stunning clusters of flowers. Do begonias come back every year? Are begonias a perennial plant or an annual … Read more
What is a cardiac electrode? An electrode is a conductive pad that is attached to the skin and enables recording of electrical currents. An ECG lead is a graphical description of the electrical activity of the heart and it is created by analysing several electrodes. What are ECG electrodes called? For a routine analysis of the … Read more
What is gel chromatography used for? Gel filtration chromatography can be used to separate compounds such as small molecules, proteins, protein complexes, polysaccharides, and nucleic acids when in an aqueous solution. When an organic solvent is used as the mobile phase, the process is alternatively referred to as gel penetration chromatography. How does gel filtration … Read more
