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Degree: Human Sciences BSc (Bachelors) - University College London University
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Nafisa (Student) March 25 2016
A carbohydrate is a long molecule made up of lots of individual units called monosaccharides. These units are sugars, including glucose, fructose and lactose.
When two of these units are bound together, it's called a disaccharide. When more than one are bound together in a chain, it is a polysaccharide - this is what starch is. Starch is a major component of a healthy diet, and is found in potatoes, bread, pasta and more.see more
A concentration gradient occurs when you have a solute, like salt, dissolved in a solution, like water. Most of the time there won't be the same amount of salt through out all of the water - there will be more in some areas (a higher concentration) and less in others (a lower concentration). From the highest concentration areas, the concentration gradually decreases to the lowest - this is called a concentration gradient and it is very important in biology.see more
Diffusion is the movement of particles from an area of high concentration to low concentration (down a concentration gradient). This occurs because the particles move randomly, and eventually end up evenly spread through the area.