Table of Contents
- 1 Why do unsaturated fatty acids have bent structures?
- 2 Why do saturated fats have straight structures while unsaturated fatty acids have bent structures?
- 3 What causes the shape of a fatty acid to be straight?
- 4 What happens to a fatty acid when it becomes unsaturated?
- 5 What is the most common source of saturated fats?
- 6 Which type of fatty acid can no longer add any hydrogen bonds to the carbon backbone?
- 7 Which would be a property of all the major types of lipids?
- 8 How is the folding of a protein chain constrained?
- 9 How are long chains of identical proteins formed?
- 10 How are proteins folded into their correct conformation?
Why do unsaturated fatty acids have bent structures?
Unsaturated fatty acids have at least one double bond between carbon atoms. This causes them to have one less hydrogen atom and allows for bending of the overall molecule.
Why do saturated fats have straight structures while unsaturated fatty acids have bent structures?
Why do saturated fatty acids have straight structures while unsaturated fatty acids have bent structures? Saturated fatty acids exhibit a linear structure while unsaturated fatty acids bend, or kink, due to double bonds within the chemical foundation.
Why do unsaturated fatty acids have kinks?
Unlike saturated fats, which have nice, straight chains, unsaturated fat molecules have “kinks” in their fatty acid chains due to the double bond (or multiple double bonds). As a result, unsaturated fat molecules are not as tightly packed together and slide around each other as a liquid.
What causes the shape of a fatty acid to be straight?
In their saturated form, the fatty acids in phospholipid tails are saturated with bound hydrogen atoms; there are no double bonds between adjacent carbon atoms. This results in tails that are relatively straight.
What happens to a fatty acid when it becomes unsaturated?
Where double bonds are formed, hydrogen atoms are eliminated. Thus, a saturated fat is “saturated” with hydrogen atoms. The greater the degree of unsaturation in a fatty acid (ie, the more double bonds in the fatty acid), the more vulnerable it is to lipid peroxidation (rancidity).
How do you tell if a fatty acid is saturated or unsaturated?
Saturated and unsaturated fatty acids
- If there are only single bonds between neighboring carbons in the hydrocarbon chain, a fatty acid is said to be saturated.
- When the hydrocarbon chain has a double bond, the fatty acid is said to be unsaturated, as it now has fewer hydrogens.
What is the most common source of saturated fats?
Saturated fat – primary sources include:
- Red meat (beef, lamb, pork)
- Chicken skin.
- Whole-fat dairy products (milk, cream, cheese)
- Ice cream.
- Tropical oils such as coconut and palm oil.
Which type of fatty acid can no longer add any hydrogen bonds to the carbon backbone?
saturated fatty acid
When a fatty acid has no double bonds, it is known as a saturated fatty acid because no more hydrogen may be added to the carbon atoms of the chain.
What happens to the acidic properties of a fatty acid when fat is formed?
What happens to the acidic properties of a fatty acid when a fat is formed? Acidic properties of fatty acids come from carboxylic acid functional groups and this quality does not exist in fat.
Which would be a property of all the major types of lipids?
Which would be a property of all the major types of lipids in this membrane? They would be saponifiable in base and hydrolyzed in acid. They would have polar heads and non-polar tails. They would be composed of five-carbon units.
How is the folding of a protein chain constrained?
The folding of a protein chain is, however, further constrained by many different sets of weak noncovalent bonds that form between one part of the chain and another. These involve atoms in the polypeptide backbone, as well as atoms in the amino acid side chains.
How are the shape and structure of proteins determined?
The protein depicted is a portion of the enzyme lysozyme, and the hydrogen (more…) As a result of all of these interactions, each type of protein has a particular three-dimensional structure, which is determined by the order of the amino acids in its chain.
How are long chains of identical proteins formed?
Most simply, a long chain of identical protein molecules can be constructed if each molecule has a binding site complementary to another region of the surface of the same molecule (Figure 3-25). An actin filament, for example, is a long helical structure produced from many molecules of the protein actin ( Figure 3-26 ).
How are proteins folded into their correct conformation?
Although a protein chain can fold into its correct conformation without outside help, protein folding in a living cell is often assisted by special proteins called molecular chaperones. These proteins bind to partly folded polypeptide chains and help them progress along the most energetically favorable folding pathway.