Questions and Answers
Which organic compounds make up lipids?
Carbon, hydrogen, oxygen
How do lipids compare to carbohydrates in terms of hydrogen content?
Lipids have higher hydrogen content than carbohydrates
In which solvents are lipids soluble?
Ether, chloroform, benzene, acetone
What percentage of the body's energy requirement is fulfilled by lipids?
Signup and view all the answers
Where are lipids widely distributed in plants and animals?
Signup and view all the answers
What are some food sources rich in lipids?
Signup and view all the answers
What is the major unit of lipids?
Signup and view all the answers
Which statement best describes the biological significance of lipids?
Signup and view all the answers
What is the role of essential fatty acids in the body?
Signup and view all the answers
How do lipids protect the body from excessive heat or cold?
Signup and view all the answers
What are breakdown products of fats used for?
Signup and view all the answers
Which type of vitamins require lipids for absorption?
Signup and view all the answers
What is the main storage form of fatty acids and chemical energy?
Signup and view all the answers
Which fatty acids are typically derived from plant sources and are liquid at room temperature?
Signup and view all the answers
Which type of lipids contain a phosphate group and are essential for constructing biological membranes?
Signup and view all the answers
What are the sources of essential fatty acids that must be obtained from the diet?
Signup and view all the answers
What is the main function of glycolipids?
Signup and view all the answers
Which type of fatty acids have no double bonds and are usually derived from animal sources?
Signup and view all the answers
What is the classification of lipids that include simple and complex types?
Signup and view all the answers
Which type of lipids are insoluble in water but soluble in fat solvents?
Signup and view all the answers
What are the two essential fatty acids for humans?
Signup and view all the answers
Which type of vitamins are usually stored in the body?
Signup and view all the answers
What is the main component of triacylglycerol (TAG)?
Signup and view all the answers
Which of the following is NOT a component of lipoproteins?
Signup and view all the answers
What is the most important animal sterol?
Signup and view all the answers
Where is cholesterol widely distributed in the body?
Signup and view all the answers
What is the important biological function of cholesterol related to membrane lipids?
Signup and view all the answers
How is vitamin D3 synthesized in the body from cholesterol?
Signup and view all the answers
7
Signup and view all the answers
Study Notes
- Vitamins A, D, E, and K are fat-soluble vitamins, requiring lipids for absorption
- Lipids are classified into simple and complex types
- Simple lipids are esters of fatty acids and alcohols
- Triacylglycerol (TAG) is a simple lipid consisting of glycerol and three fatty acids, functioning as the main storage form of fatty acids and chemical energy
- Triacylglycerol is insoluble in water but soluble in fat solvents and exists in solid (fats) or liquid (oils) form depending on fatty acid composition
- Lipids are also classified as saturated, unsaturated, monounsaturated, polyunsaturated, and essential fatty acids
- Essential fatty acids are not produced by the body and must be obtained from the diet, with linoleic acid and alpha-linolenic acid being essential for humans
- Saturated fatty acids are usually derived from animal sources, solid at room temperature, and have no double bonds, such as palmitic acid, while monounsaturated and polyunsaturated fatty acids are typically derived from plant sources and are liquid at room temperature
- Sources of fatty acids include saturated (milk, cheese, butter) and unsaturated (olives, avocados) forms, with polyunsaturated and omega-3 and omega-6 fatty acids having particular health benefits
- Complex lipids include phospholipids, glycolipids, and other complex lipids
- Phospholipids, such as lecithin, contain a phosphate group and are essential for constructing biological membranes and functioning as a carrier for triglycerides and cholesterol in the plasma
- Glycolipids, found mainly in the myelin sheath and red blood cell membranes, act as cell membrane receptors and provide recognition properties.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
By Ahmed Safaa
Telegram channel : <a href="https://t.me/mcqb2">https://t.me/mcqb2</a>
