Multiple Choice
Proteins combine with ______ to form a ribosome.
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4. Biomolecules
Proteins
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The body uses _____ to build and maintain muscles, bones, skin, hair, nails, and other organs.
A
nucleic acids
B
proteins
C
carbohydrates
D
lipids
Verified step by step guidance1
Step 1: Begin by identifying the primary function of each macromolecule listed in the options: nucleic acids, proteins, carbohydrates, and lipids.
Step 2: Recall that nucleic acids (DNA and RNA) are responsible for storing and transmitting genetic information, not directly involved in building and maintaining body structures.
Step 3: Understand that carbohydrates primarily serve as a source of energy for the body, rather than structural components for muscles, bones, skin, etc.
Step 4: Recognize that lipids (fats) are important for energy storage, insulation, and cell membrane structure, but they are not the main macromolecule used for building and maintaining body tissues.
Step 5: Conclude that proteins are the correct answer, as they are essential for building and repairing tissues, including muscles, bones, skin, hair, nails, and other organs. Proteins are made up of amino acids, which serve as the building blocks for these structures.
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