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Suppose a chemist has two fatty acids and wants to identify which one is saturated and which one is unsaturated. She has discovered that they have the same chain length. She can identify the saturated fatty acid because it has more

carbon atoms.

oxygen atoms.

hydrogen atoms.

nitrogen atoms.

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Which is an important function of lipids in the body?

provide the body with energy and fiber

provide the body with vitamins and bile salts

provide the building blocks for muscle tissue

provide control of substances going into and out of cells

A dietician asks a patient about the food that the patient eats and makes the table below to summarize the results.MacromoleculeSuggested percentage of dietActual percentage of dietCarbohydrates45–65%70%Lipids20–35%5%Proteins10–35%25%Based on the table, what advice do you think that the dietician will give the patient?

The patient should increase the amount of lean meats (proteins) and decrease the amount of oils in his or her diet.

The patient should decrease the amount of lean meats (proteins) and increase the amount of oils in his or her diet.

The patient should decrease the amount of rice and pasta and increase the amount of oils in his or her diet.

The patient should decrease the amount of rice and pasta and increase the amount of lean meats (proteins) in his or her diet.

There are 25 elements found in living things. How many of these elements are found in some organisms but not all?

How many amino acids must be obtained in the diet because they cannot be made by the body?

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