... and eukaryotic cell or multi-cellular, which have more complex interior. As the more complex cell, eukaryotic has various structures (organelles) in the cell. One of the most fundamental structures is the plasma membrane. In regard to the crucial roles of the plasma membrane, which is a part of ... can acts as a barrier for those polar substances, for example, amino acids, sugar and salts. Many protein and cholesterol embedded in plasma membrane particularly to the part that stick outside the cell also have carbohydrate group attached to them, this cholesterol is called glycolipid, which...

• Word Count: 936
• Approx Pages: 4
• Grade Level: Undergraduate

... are the simple sugars or monosaccharides. The most important is glucose. They are an important source of energy for plants, animals and humans. Proteins are polymers constructed of 20 different amino acids which in turn are composed of carbon, hydrogen, oxygen, nitrogen and sometimes sulfur and are combined in ways to form the protein molecules an organism needs. They form the ... carries oxygen to cells. Other protein in the cells use the oxygen to break down the sugar glucose to create the energy the body needs. Proteins also form important bodily structures, they are the important pa...

• Word Count: 728
• Approx Pages: 3
• Grade Level: Undergraduate