Enzymes, antibodies, and muscle fiber are all types of what?

• Correct Answer: proteins
• acids
• lipids
• carbohydrates

Explanation: Many important molecules in your body are proteins. Examples include enzymes, antibodies, and muscle fiber. Enzymes are a type of protein that speed up chemical reactions. They are known as "biological catalysts. " For example, your stomach would not be able to break down food if it did not have special enzymes to speed up the rate of digestion. Antibodies that protect you against disease are proteins. Muscle fiber is mostly protein ( Figure below ).

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