Which macromolecule stores the most energy

Saturated fatty acids are solid at room temperature, like butter. Unsaturated fatty acids have at lease one double bond. These double bonds create kinks in the carbon skeleton, preventing hydrogen atoms from packing onto the skeleton. Unsaturated fatty acids are therefore more fluid and are liquid at room temperature, like oil and natural peanut butter. Because lipids do not include true polymers, they are not big enough to be considered macromolecules.

However, like fats, lipids are hydrophobic. Fats are considered macromolecules and are composed of glycerol and fatty acid molecules.

The glycerol and fatty acid molecules are joined via an ester linkage, which is formed by a dehydration reaction. ATP stands for adenosine triphosphate. Ribose is the five-carbon sugar, which is bonded to a phosphate group and adenine group in a molecule of ATP.

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Explanation : Unlike carbohydrates and proteins, lipids are mainly nonpolar molecules. Report an Error. Example Question 2 : Macromolecules. Possible Answers: can be digested or created in the body.

Correct answer: have both polar and nonpolar sections. Explanation : Amphipathic molecules have both polar and nonpolar sections. Example Question 3 : Macromolecules. Possible Answers: Starch. Correct answer: Cellulose. Explanation : Cellulose is a polysaccharide in which the monomers are linked by a beta linkage. Example Question 4 : Macromolecules. Which of the following classes of molecules produces the most energy per gram?

Possible Answers: Nucleic acids. Correct answer: Fats. Explanation : There are four classes of biological molecules: fats, carbohydrates, proteins, and nucleic acids. Example Question 5 : Macromolecules. Which of the following is not a type of fat in the body? Possible Answers: Di-saturated fats. Correct answer: Di-saturated fats.

Explanation : Lipids, or fats, are formed from hydrocarbon chains. Most fats in the body are triglycerides. Their primary function is long-term energy storage. Example Question 6 : Macromolecules. Possible Answers: Triglyceride. Correct answer: Ribose. Explanation : Carbohydrates are known as sugars or saccharides. Example Question 7 : Macromolecules. Because of this, simple or fast-acting carbohydrates from foods like candy, baked goods and juices can cause a spike and then a crash in blood sugar and energy levels.

Complex carbohydrates, which include whole grains and legumes, raise your blood sugar levels more slowly, give you more sustained energy and even help you feel full longer. According to the Dietary Guidelines for Americans, 45 to 65 percent of your daily calories should come from carbohydrates. Fat slows down digestion, so you can also combine healthy fats with carbohydrates to slow those spikes in blood sugar and give yourself a more sustained boost of energy.

Your body can burn protein as energy, but it's also used for growth and maintenance. Think of it as a set of building blocks that your body can use for renovations.

Protein takes a long time to digest, and it elevates your blood sugar levels very little, so while it's not your body's preferred quick-acting fuel, high-protein snacks like jerky and soy nuts won't cause you to peak and crash, either. According to Dietary Guidelines for Americans, 10 to 35 percent of your daily calories should come from protein. Lisa is a retired personal trainer with more than 4, hours of hands-on experience working with a variety of clients, from sports teams to weight loss and post-rehab populations.

She's also a professional writer. Note that the DNA molecule shown below is double stranded, and that the two strands run in opposite directions, denoted by the 3' and 5' ends.

While nucleic acids are important as information carrying molecules, they are not nutritionally important. The Molecules of Life Proteins Proteins are the primary building materials of the body.

Dehydration Synthesis and Hydrolysis: Proteins, fats, and carbohydrates all use these two common reactions involving water to assemble and disassemble the molecule.

When two hydrogens and one oxygen are removed from two separate molecules and the result is a single molecule and a water, this is called a dehydration synthesis reaction. The molecules are "dehydrated" because water is removed, and they are synthesized joined into one large molecule. When one large molecule is split lysis means splitting into two molecules with the addition of water and energy, the reaction is called hydrolysis.

In each of the illustrations, these reactions, which are opposites, are shown in red. Fats lipids Fats are the primary long-term energy storage molecules of the body. Fats are made of a glycerol left and up to three fatty acids. Heart health and fats : Saturated fatty acids have no double bonds and therefore hold the maximum number of hydrogens.

In other words, the carbons are "saturated" with hydrogen. Unsaturated fatty acids have some double bonds and therefore hold fewer hydrogens. Saturated fats are not as good for you as unsaturated fats. Saturated fats are long straight molecules that can clog your arteries, whereas more unsaturated fats, because of the additional double bonds, are more bendy and less likely to clog up the small blood vessels. It's like the difference between trying to swallow an uncooked spaghetti stick and a cooked spaghetti noodle.

Carbohydrates Glucose, a 6-carbon sugar, is a simple carbohydrate or " mono-saccharide.