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Chapter 9: Q2CC (page 164)

Question: Under what circumstances might your body synthesize fat molecules?

Short Answer

Expert verified

Fat is the storage form of energy. The excess energy produced in our body is stored in the form of fat. The overconsumption of food is the primary reason for the formation of fat.

Step by step solution

01

Definition of biological molecules

The biological molecules are the essential elements that the body requires to build its cells. These biological entities perform different roles.

02

Types of biological molecules

The major classifications of biological molecules are carbohydrates, fat, proteins, and nucleic acids. The body utilizes the energy produced from the carbohydrates for its functioning.

Proteins are the sequence of amino acids that are connected by peptide bonds. Nucleic acids are nitrogenous bases. Fats are lipid molecules.

03

Storage of excess energy

The primary energy source of the body is glucose.The consumption of glucose happens via the digestion of food. When there is excess food consumption, the body synthesizes fat from this extra energy.

The fat molecules are stored in the adipose tissue. During the absence of glucose intake, the storage fat acts as the fuel source for the body to yield energy.

Hence, our body tends to store excess energy in the form of fat. This storage mechanism is mainly necessary for using extra energy during starvation.

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Most popular questions from this chapter

Graph the data for each sample. Match each x-value with its y-value and place a mark on the graph at that coordinate, and then draw a bar from the x-axis up to the correct height for each sample. Why is a bar graph more appropriate than a scatter plot or line graph? (For additional information about graph, see the scientific Skills Review in Appendix. F).

Question: The graph here shows the pH difference across the inner mitochondrial membrane over time in an actively respiring cell. At the time indicated by the vertical arrow, a metabolic poison is added that specifically and completely inhibits all functions of mitochondrial ATP synthase. Draw what you expect to see for the rest of the graphed line, and explain your graph.

Question: In the 1930s, some physicians prescribed low doses of a compound called dinitrophenol (DNP) to help patients lose weight. This unsafe method was abandoned after some patients died. DNP uncouples the chemiosmotic machinery by making the lipid bilayer of the inner mitochondrial membrane leaky to H+. Explain how this could cause weight loss and death.

Membranes must be filled with fluid to function properly(as you learned in Concept 7.1). How does the operation of the electron transport chain support that assertion?

Question: Coenzyme Q (CoQ) is sold as a nutritional supplement. One company uses this marketing slogan for CoQ. "Give your heart the fuel it craves most." Considering the role of Coenzyme Q, critique this claim. How do you think this product might function to benefit the heart? Is CoQ used as a "fuel" during cellular respiration?
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