What Are the Functions of Triglyceride Phospholipid & Sterol?Chat or rant, adult content, spam, insulting other members, show more. Harm to minors, violence or threats, harassment or privacy invasion, impersonation or misrepresentation, fraud or phishing, show more. How do the Structure of Triglycerides, phospholipids and steroids relate to their function? Hi, I have a test tomorrow and I need help with Amino acids. Any help is greatly appreciated!
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Chat or rant, adult content, spam, insulting other members, show more. Harm to minors, violence or threats, harassment or privacy invasion, impersonation or misrepresentation, fraud or phishing, show more. How do the Structure of Triglycerides, phospholipids and steroids relate to their function?
Hi, I have a test tomorrow and I need help with Amino acids. Any help is greatly appreciated! Are you sure you want to delete this answer? A look at the lipid group of biological molecules. Including the fatty acids, triglycerides, phospholipids, glycolipids, waxes, lipoproteins and steroids.
Lipids are a chemically diverse group that share the same characteristic of being sparingly soluble in water and highly soluble in non-polar organic solvents like acetone. The group has two major roles; in structure, particularly in the membranous organelles and in energy storage as lipids have a higher calorific value than carbohydrates. The lipid group includes: Fatty acids Most fatty acids in cells are linked to other molecules.
They are either saturated or unsaturated fatty acids. In both cases, the hydrocarbon chain is unbranched. Saturated fatty acids have long hydrocarbon chains terminating in a carboxyl group.
In naturally occurring fatty acids, the n referred to in the general formula is normally an even number and is somewhere between 2 and In unsaturated fatty acids, at least two and no more than six carbon atoms in the hydrocarbon chain are linked together by double bonds.
Triglycerides A triglyceride consists of a glycerol and three fatty acids. It is the major type of lipid used for energy storage and it is found in droplets within the cytoplasm. It is non-polar and relatively insoluble. Triglycerides are divided into two groups dependent on their state at 20 oC; if they are solid at this temperature, they are called fats and if they are liquid, they are called oils.
The higher the proportion of unsaturated fatty acids in the triglyceride the lower its melting point. Triglycerides are less dense than water, therefore they float. Phospholipids Phospholipids are lipids containing a phosphate group, they are found in cellular membranes. What Are Organic Molecules? Glycolipids Glycolipids are lipids with short chains of sugar attached to them. They are commonly found in cellular membranes.
They are involved in the immune system and cell-to-cell recognition. Waxes Waxes are esters of fatty acids combined with long chain alcohols. Waxes are mainly used as a waterproofing material by plants and animals, e. Lipoproteins Lipoproteins are combinations of lipids and proteins, they are found in membranes. When lipids are transported through the blood and lymphatic systems, they are in the form of lipoproteins.
Steroids Steroids do not contain fatty acids. Steroids have widely different physiological properties. Hormones such as oestrogen are steroids, as are vitamins such as D2. The most well known plasma membrane steroid is cholesterol. First tiglycerides, phospholipids and steroids are all nonpolar hydrocarbons.
There are not made up with amino acids as their basic components. Proteins are polymerized amino acids. Phospholipids are compound forms with a polar phosphorus containing head attached to two nonpolar fatty acid tails. Membrane Phospholipids are amphipathic, with a split nature.
The polar head is attracted to water while the nonpolar tails are repelled by water. This causes them to naturally align in aqueous conditions with the head facing the external aqueous solution in one layer and the second layer with the heads facing the internal aqueous solution. Function follows the molecular form. This Site Might Help You. For the best answers, search on this site https: The inside of the cell is lipid soluble, while the outside extracellular fluid is water soluble.
Therefore, if you have a molecule that is water soluble, it will only be able to stay on the outside of the cell, and not enter the cell.
Triglycerides- they are lipids, and therefore, they can dissolve fatty like things- such as FAT! Because triglycerides can dissolve fats, they are used as transporters of lipids fats to and out of the cell ever heard of low density lipoprotein, or LDL?
Triglyceride is a major component of LDL. Phospholipids- ever heard of the phospholipid bilyaer the layer on the exterior of the cell cell membrane? As explained above, it keeps out water soluble substances from crossing the cell membrane. It's hydrophobic water fearing.
Waxes siimlar to phosphlipids - waxes don't dissovle in water, because waxes are lipids. Steroids- its a lipid, so it is lipid soluble. Therefore, steroids can cross the cell membrane because the cell is soluble to lipids. Hence, steroids can enter the cell, and enter the nucleus of the cell to affect and alter DNA, protein synthesis, etc. As it's not a question although you have added a question mark , maybe it shouldn't be here; it should be an instruction to you to get on with your work!
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