Multiple Choice
All living things contain carbon. Which of the following statements about carbon atoms is true?
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4. Biomolecules
Carbon
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Which of the following best describes the role of carbon in biological systems?
A
Carbon is only found in inorganic compounds within living organisms.
B
Carbon is the main source of energy storage in cells.
C
Carbon acts primarily as a catalyst in most enzymatic reactions.
D
Carbon forms the backbone of organic molecules, allowing for the diversity and complexity of life.
Verified step by step guidance1
Understand the role of carbon in biological systems: Carbon is a fundamental element in biology because it has the unique ability to form four covalent bonds, allowing it to create complex and diverse molecules.
Recognize that organic molecules, which are essential for life, are primarily composed of carbon atoms bonded to hydrogen, oxygen, nitrogen, and other elements. These include carbohydrates, lipids, proteins, and nucleic acids.
Eliminate incorrect options: Carbon is not only found in inorganic compounds within living organisms, as it is a key component of organic molecules. It is also not the main source of energy storage (this role is typically played by molecules like ATP or glucose), nor does it act primarily as a catalyst (enzymes, which are proteins, serve this role).
Focus on the correct description: Carbon forms the backbone of organic molecules, which is crucial for the structural and functional diversity of biomolecules in living organisms.
Conclude that the correct answer is: Carbon forms the backbone of organic molecules, allowing for the diversity and complexity of life.
