What Is the Difference Between Lipids and Fats in Structure and Function
Many times, we are stopped from eating junk food because they contain something called bad fats or bad cholesterol. Have you ever heard of these? And if lipids and fats are mentioned together, then what is the difference between the two? If yes, then Vedantu has brought answers for you.
To lead a healthy lifestyle, we tend to eat foods with less fat. In reality, fats are just an essential part of the diet that makes up for a very important nutrient in the body to maintain good health. Lipids, on the other hand, are organic compounds that form the framework of the structure and function of the living cells. Fats play a vital role in metabolic and chemical functions in the body but they are different from lipids in chemical and physical aspects.
Difference Between Lipids and Fats in Tabulated Form
Lipids
Lipids are nonpolar organic compounds that are soluble in non-polar solvents and insoluble in water. They are a wide group of macromolecules that form the structural and functional framework of the living cells. Lipids are synthesized in the liver and are often sourced from whole milk, butter, oils, fried food, and found in some red meats. Lipids constitute the cell membrane which is an important biological barrier that protects the inner cell from the outer surroundings. They are polymers of fatty acids with a nonpolar hydrocarbon chain and a small polar oxygen group.
Types of Lipids
Lipids are classified as triglycerides, phospholipids, and steroids.
Triglycerides: They are the largest group of lipids, also known as natural fats. They can be either unsaturated or saturated thus, they can be either liquid or solid at room temperature respectively.
Phospholipids: They contain a phosphoric acid residue in addition to the fatty acid and alcohol groups. They form the outermost layer of cells in humans and animals.
Steroids: They are present as hormones and carbohydrates in the body and are hydrophobic molecules.
Butter, vegetable oil, cheese, cholesterol, and other steroids, waxes, phospholipids, fat-soluble vitamins, etc are some examples of lipids.
Fats
Fats are types of lipids present in the body in adipose tissues, found under the skin and surrounding the organs in the body. They are oily substances with a high saturation rate. Due to high saturation, they are solids only unlike lipids which can be solids or liquids. They are essential for the proper functioning of the body and are obtained from our daily diet. They play a major role in controlling inflammation, blood coagulation and brain development in humans and many animals. They are energy reserves of the body. Also, they help the body to absorb and transport a few vitamins through the bloodstream.
Types of Fats
Fats are classified as saturated fats, trans fats, and unsaturated fats.
Saturated Fats: They increase good cholesterol levels in the body and are hence good for health. But in excess, they can negatively increase cholesterol. 10% of daily calories from saturated fat is considered a healthy diet. They are solid at room temperature therefore, they are also known as solid fats. They are usually found in milk, cheese, poultry, tropical oils, etc.
Unsaturated Fats: They are found in all processed food and naturally in beef, lamb, milk, cheese, cream, butter, etc. They are liquid at room temperature. Monounsaturated fat and polyunsaturated fats are their further types.
Monounsaturated Fats: They are found in nuts and vegetable oils. Their consumption can reduce bad cholesterol.
Polyunsaturated Fats: They are mainly found in vegetable oils. They can also lower bad cholesterol if consumed as an alternative to saturated fat.
Trans Fats: They are produced on the Hydrogenations of unsaturated fats. They can increase cholesterol thus, should be consumed within the limit. They are found in processed food, snacks, etc.
Conclusion
Completing the topic of Difference Between Lipids and Fats has equipped you with all the needed content for answering questions that may be asked in the exams. This topic is also essential for biochemistry as well. Questions from this section have appeared in NEET and JEE exams as well. Vedantu gives significance to this topic therefore, it has provided you with this write-up.
You can refer to Vedantu’s website for enriching your learning experience of Biology further.
FAQs on Difference Between Lipids And Fats in Biology
1. What is the difference between lipids and fats?
The main difference between lipids and fats is that lipids are a broad group of hydrophobic biomolecules, while fats are a specific type of lipid mainly used for energy storage.
- Lipids include fats, oils, waxes, phospholipids, and steroids.
- Fats are usually triglycerides made of glycerol and three fatty acids.
- All fats are lipids, but not all lipids are fats.
2. What are lipids in biology?
Lipids are a group of organic biomolecules that are insoluble in water and play key roles in energy storage and cell structure.
- They are mainly made of carbon, hydrogen, and oxygen.
- They are hydrophobic or nonpolar molecules.
- Major types include triglycerides, phospholipids, steroids, and waxes.
3. What are fats made of?
Fats are made of one molecule of glycerol and three fatty acids, forming a triglyceride.
- Glycerol is a three-carbon alcohol.
- Each fatty acid contains a long hydrocarbon chain and a carboxyl group.
- The bonds between glycerol and fatty acids are ester bonds.
4. Are all fats considered lipids?
Yes, all fats are considered lipids because they share the characteristic property of being hydrophobic biomolecules.
- Fats fall under the lipid category as triglycerides.
- They are insoluble in water and soluble in organic solvents.
- They function mainly in energy storage and insulation.
5. What are the main functions of lipids in the body?
The main functions of lipids in the body are energy storage, cell membrane formation, insulation, and hormone production.
- Triglycerides store long-term energy.
- Phospholipids form the cell membrane bilayer.
- Steroids like cholesterol act as hormones or hormone precursors.
- They provide thermal insulation and protect vital organs.
6. What is the difference between fats and oils?
The difference between fats and oils is that fats are usually solid at room temperature, while oils are liquid.
- Fats contain more saturated fatty acids with no double bonds.
- Oils contain more unsaturated fatty acids with one or more double bonds.
- Both are types of triglycerides.
7. Why are lipids insoluble in water?
Lipids are insoluble in water because they are nonpolar molecules and water is a polar solvent.
- Lipids have long hydrocarbon chains that lack charge.
- Water molecules form hydrogen bonds with other polar molecules, not with nonpolar lipids.
- This property is called hydrophobicity.
8. How do phospholipids differ from fats?
Phospholipids differ from fats because they contain two fatty acids and a phosphate group instead of three fatty acids.
- Fats (triglycerides) have three fatty acids attached to glycerol.
- Phospholipids have two fatty acids and one phosphate group.
- Phospholipids are amphipathic, with a hydrophilic head and hydrophobic tails.
9. What are examples of lipids other than fats?
Examples of lipids other than fats include phospholipids, steroids, and waxes.
- Phospholipids form cell membranes.
- Steroids such as cholesterol and testosterone act as hormones or membrane components.
- Waxes provide waterproofing in plants and animals.
10. Why are fats important for energy storage?
Fats are important for energy storage because they contain a high amount of chemical energy in their fatty acid chains.
- Triglycerides yield more energy per gram than carbohydrates.
- Their long hydrocarbon chains have many carbon–hydrogen bonds.
- They are stored in adipose tissue in animals.
