BIOLOGY
NUCLEIC ACIDS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
No, never
|
|
|
Yes, only when carbohydrates and lipids are not available
|
|
|
Yes, only when nucleic acids are not available
|
|
|
None of the above
|
Detailed explanation-1: -Protein is not usually used for energy. However, if the body is not getting enough calories from other nutrients or from the fat stored in the body, protein is broken down into ketone bodies to be used for energy.
Detailed explanation-2: -Proteins are crucial for the nourishment, renewal, and continuance of life. Proteins contain the elements carbon, hydrogen, and oxygen just as carbohydrates and lipids do, but proteins are the only macronutrient that contains nitrogen.
Detailed explanation-3: -Ketones are molecules formed from the breakdown of fatty acids. Your body creates them when carbs are not available to provide your body with the energy it needs to function. Ketosis happens when the body produces large amounts of ketones to use for energy.
Detailed explanation-4: -All three provide energy (measured in calories), but the amount of energy in 1 gram (1/28 ounce) differs: 4 calories in a gram of carbohydrate or protein.
Detailed explanation-5: -Lipids have a higher caloric value per gram than carbohydrates or proteins because their molecules have more hydrogen atoms to remove. More hydrogen atoms equal more energy.