Table of Contents
What are unbranched carbon chains that make up most lipids?
Terms in this set (20)
- lipids. -large, nonpolar organic molecules that don’t dissolve in water (fats)
- Fatty acids. -unbranched carbon chains that make up most lipids.
- Neutral acids. -most abundant lipids.
- Glycerol. -an example of a neutral fat.
- waxes.
- saturated fatty acids.
- unsaturated fatty acids.
- triglycerides.
What are the chains that make up lipids?
Lipids contain the same elements as carbohydrates: carbon, hydrogen and oxygen (C, H, and O). However, lipids are mainly made of hydrocarbon chains (or rings) and contain fewer polar hydroxyl groups (-OH). This makes most lipids nonpolar hydrophobic molecules (they do not dissolve well in water).
What are the two different types of chains in lipids?
A phospholipid is an amphipathic molecule, meaning it has a hydrophobic and a hydrophilic part. The fatty acid chains are hydrophobic and cannot interact with water, whereas the phosphate-containing group is hydrophilic and interacts with water (Figure 9).
Do lipids have chains?
Fatty Acids and Triacylglycerides The fatty acids are lipids that contain long-chain hydrocarbons terminated with a carboxylic acid functional group. Because the long hydrocarbon chain, fatty acids are hydrophobic (“water fearing”) or nonpolar.
Why do lipids have a high energy content?
Why do lipids store so much more energy than carbohydrates? Therefore, when the greater number of electrons around the carbon atoms in fatty acids are transferred to oxygen (when the fatty acids are oxidized), more energy is released than when the same process happens to carbohydrates.
What is the basis for grouping substances as lipids?
what is the basis for grouping substances as lipids? based on their solubility properties. Lipids are soluble in organic solvents but insoluble in polar solvents. To what class of lipids does sphingosine and a fatty acid belong?
Why do we need lipids in our body?
Lipids play diverse roles in the normal functioning of the body: they serve as the structural building material of all membranes of cells and organelles. they provide energy for living organisms – providing more than twice the energy content compared with carbohydrates and proteins on a weight basis.
What are the best known lipids?
The three main types of lipids are triacylglycerols, phospholipids, and sterols. Triacylglycerols (also known as triglycerides) make up more than 95 percent of lipids in the diet and are commonly found in fried foods, vegetable oil, butter, whole milk, cheese, cream cheese, and some meats.
Do lipids have more energy than carbohydrates?
Because one triglyceride molecule yields three fatty acid molecules with as much as 16 or more carbons in each one, fat molecules yield more energy than carbohydrates and are an important source of energy for the human body.
Do lipids insulate the body?
The body uses lipids as an energy store, as insulation and to make cell membranes.