Lipids, Fats, and Biochemistry

Although, the main source of energy for our bodies is carbohydrates, fat is used as a source of backup energy in cases when carbohydrates are not available. This is a concentrated energy source but it is important to remember that each gram of fat has nine calories (over double the calories from protein and carbohydrates) so you should avoid having more than 20 to 35% of your daily calories from fat. In a 1,800 calorie diet, you should only consume 40-70 grams of fat.

Non-essential fatty acids are those fatty acids that the body can synthesize on its own. Essential fatty acids are those fatty acids that are required by the body but it cannot synthesize. There are two essential fatty acids, linoleic and alpha-linolenic acid. These must be obtained from food. 

Unsaturated fats are liquid at room temperature as they have double bonds. Saturated fatty acids have single bond and are solid at room temperature. Polyunstaurated fats are good for health as they boost up the good cholestrol level. As they are liquid so they do not choke the blood vessels and they are easily metabolized. Polyunsaturated fats include omega-3 and omega-6 fats. These are essential fatty acids that the body needs for brain function and cell growth.

Bile salts emulsify fats (a physical process aiding digestion) and also form micelles, which are necessary for the absorption of fatty acids and monoglycerides across the intestinal wall.

The excess carbohydrates and proteins are stored in the body as fats. It gets converted into energy during excessive physical work. Essential fatty acids are those fatty acids which play an important role in the biological process and they can be metabolized easily. These acts as a fuel rather getting deposited as fat in the body. The human body cannot synthesize essential fatty acids. Unsaturated fats are liquid at room temperature as they have double bonds. The essential fatty acids are unsaturated as they have double bonds. Saturated fatty acids have the single bond and are solid at room temperature.

Vitamins A, D, E, and K are the fat soluble vitamins, meaning they are absorbed along with dietary fats and stored in the body's fatty tissues.

Lipase is the specific enzyme responsible for the hydrolysis of fats (lipids) into glycerol and fatty acids.

Bile salts, specifically sodium glycocholate and sodium taurocholate, act as detergents to emulsify fats, increasing the surface area for lipase action.

Fat is an essential part of our diet and is important for good health.

fat is the major storage form of energy in the body. These are found in plant foods and fish. Fats help in the absorption of fat-soluble vitamins A, D, E, and K. 

So, the correct option is ‘Fats yield the double amount of energy yielded by glucose on oxidative breakdown’.

Fats (lipids) are highly variable in their composition and structure across different animal species, reflecting specific dietary and environmental adaptations, whereas proteins and carbohydrates are more conserved.

Lipase catalyzes the hydrolysis of triglycerides (fats) into glycerol and three fatty acid molecules.

Essential fatty acids, or EFAs, are fatty acids that humans and other animals must ingest because the body requires them for good health but cannot synthesize them. Two essential fatty acids, linolenic and linoleic acid, cannot be synthesized in the body and must be obtained from food. These basic fats, found in plant foods, are used to build specialized fats called omega-3 and omega-6 fatty acids.

Fatty acids are long, straight chain carboxylic acids. A fat molecule is formed when three fatty acids molecules combine with one glycerol molecule to yield a triglyceride (another name for fat) along with three water molecules. Fats are not easily digested and are transported and stored as triglycerides.