Diffusion rates are dependent on molecular sizes because larger molecules diffuse slower than smaller molecules. The sizes of the particles involved in the diffusion are important because they closely relate to the concepts of heat and energy in the context of diffusion. It takes more energy and heat to move a larger object than a smaller one, so larger particles require more heat from their surroundings.Continue Reading
Diffusion relies heavily on energy and movement. In any given environment, there are several factors that impact a molecule's mobility: size of the molecule, viscosity of the surroundings, interactions between macromolecules and the specific type of transportation that is used by the molecule. Because diffusion relies on movement and movement relies on the size of the molecule, there is a direct relationship between molecular size and diffusion rate.
Larger molecules necessitate larger amounts of energy to engage in the same level of activity as smaller molecules. If there is not sufficient energy to move a larger molecule, it resists the effects of diffusion and is unable to move from one area to the next. Increases in environmental heat or other extraneous factors also have an impact on the energy involved in the diffusion process and the rate at which a large molecule diffuses.Learn more about Molecular Biology & DNA
The rate at which molecules diffuse across the cell membrane is directly proportional to the concentration gradient. This applies to simple diffusion, which is governed by Fick's law.Full Answer >
Examples of facilitated diffusion are the passing of K+ ions through a membrane with an aid of a potassium transport protein and the passing of glucose and amino acids with the aid of proteins called permeases. Retinol binding protein acts as a water-soluble carrier for retinol and fatty acids.Full Answer >
Agarose gel is used in the process of electrophoresis, which separates fragments of DNA according to their structure and dimensions DNA molecules are generally digested with restriction enzymes, and agarose gel electrophoresis serves as a diagnostic tool to help researchers visualize fragments. Agarose gel is a thick, viscous substance, comprised of polysaccharide matrixes, that essentially catches molecules transported by electric currents.Full Answer >
Thymine is a nitrogenous base that is found in DNA molecules but not in RNA molecules, according to Vision Learning. Instead of thymine, RNA molecules utilize uracil.Full Answer >