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If one inspects the reactions needed to burn lipids for energy, it becomes obvious that tremendous amounts of oxygen are needed and humans do not have the necessary lung capacity for this.

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What is the one limiting factors that prevents humans from using lipids for energy rather than carbohydrates?

because lipids form ketone bodies, which may be toxic.


Why might mammals store lipids rather than carbohydrates?

Lipids (fats) are heavier, more calorie dense and are not water soluble...which makes them a better candidate for storage in an animal system...fat is also a great insulator that helps maintain body temperature. Fat is also a better, more flexible for animals which need to move. Plants convert and store carbohydrates in the form of starch and cellulose. Cellulose is structural, not generally flexible...


Why is it an advantage for animals that migrate long distances to store energy as lipids rather than carbohydrates?

Fat and glycogen have different chemical properties. Fat contains more energy for mass than sugars. For birds, who need to be very light to remain aerodynamic, storing a vast majority of the energy as fat is much more efficient.


What molecules are primarily used for long term energy storage I am the lemur?

The primary molecules used for long-term energy storage are lipids, particularly in the form of triglycerides stored in adipose tissue. These molecules provide a dense source of energy, as they contain more than double the energy per gram compared to carbohydrates. In addition to lipids, carbohydrates such as glycogen can also serve as a shorter-term energy reserve, but they are more suited for quick access rather than long-term storage.


Which are the main energy foods for humans?

The main energy foods for humans include carbohydrates, fats, and proteins. Carbohydrates, found in grains, fruits, and vegetables, are the body's primary and quickest source of energy. Fats, found in oils, nuts, and dairy products, provide a concentrated energy source and are essential for various bodily functions. Proteins, from sources like meat, legumes, and dairy, also contribute to energy but are primarily used for growth and repair rather than as a primary energy source.


Are starches and sugars examples of carbohydrates?

Yes,they are.But you can think of them as carbohydrates at different levels......sugars are simpler than cellulose which is found in plants.Also satarch is the bit more complex carbohydrate(not as much as cellulose)which is stored in plants for their use whenever they need it...


Why lipids have such a high energy content?

The high energy density (i.e. the relatively large amount of energy released per unit of mass) of fat stores is due to three main factors. 1) The completely reduced carbons of fatty acids have a higher energy content than the partially oxidized carbons of carbohydrates and proteins. 2) The fortuitous fact that the reduced carbons have covalent bonds to light atoms (hydrogen rather than to the heavier oxygen) means that the fully reduced hydrocarbon compounds are lighter than the partially oxidized carbohydrates. 3) Lipids are hydrophobic molecules and therefore fat stores contain little water, which would add to the weight of the molecules without adding to the energy content. Hope that helps.


Can some autotrophs obtain their energy from chemicals rather than sunlight to produce carbohydrates?

Yes, hydrogen sulfide


Why do you think people running marathons take high energy drinks rather than eat a food containing carbohydrates?

Because energy drinks give you more energy, but carbohydrates just give you growth. Wow you must be very stupid. GOSH


Carbohydrates provide a source of energy because they?

contain available hydrogen that your body can make available to the mitochondria of your cells.


Is energy a nutrient?

No, energy is not a nutrient but rather a measure of the ability to do work. Nutrients are substances that provide nourishment and are essential for growth, maintenance, and repair of the body. Energy is derived from nutrients like carbohydrates, fats, and proteins.


Why is ATP generated in photosynthesis rather than using light energy to directly synthesise carbohydrates?

ATP is generated in photosynthesis as an intermediate energy carrier that can be used to drive the synthesis of carbohydrates and other molecules. This process allows for efficient use of energy and regulation of metabolic pathways. Direct synthesis of carbohydrates from light energy would require mechanisms to capture and store energy with high efficiency, which is more complex compared to using ATP as an energy carrier.