NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Large, nonpolar organic molecules that include waxes and store more energy per gram than other organic compounds are ____
A
nucleic acids
B
lipids
C
carbohydrates
D
proteins
Explanation: 

Detailed explanation-1: -Lipids are a class of macromolecules that are nonpolar and hydrophobic in nature. Major types include fats and oils, waxes, phospholipids, and steroids. Fats are a stored form of energy and are also known as triacylglycerols or triglycerides.

Detailed explanation-2: -Lipids are energy-rich organic, non-polar molecules. These organic compounds contain carbon, hydrogen and oxygen atoms that form a framework for the structure and function of living cells. They are insoluble in water and only soluble in nonpolar solvents as water is a polar molecule.

Detailed explanation-3: -There are four classes of biological molecules: fats, carbohydrates, proteins, and nucleic acids. Of these, fats produce the most energy per gram at a whopping nine calories per gram. Carbohydrates and proteins produce less than half of this, at only four calories per gram.

Detailed explanation-4: - Organic molecules with a basic structure composed of carbon, hydrogen, and oxygen that often bond to form fatty acids and glycerols. Lipids have more carbon-hydrogen bonds than carbohydrates, thus contain more energy per gram than carbohydrates or proteins, which explains why fats have a greater caloric value.

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