4. Biomolecules

What is the reason carbon atoms are the most versatile building blocks of the molecules used by living organisms?

Which of the following processes can transfer carbon from seashells (composed mainly of calcium carbonate, CaCO\(_3\)) to the atmosphere?

Which characteristic best explains why carbon is relevant to living organisms?

Why are all living organisms based on molecules that contain carbon?

Your body is primarily composed of which element?

Which of the following best describes the role of carbon in biological systems?

After a carbon atom leaves Earth's atmosphere as part of a carbon dioxide molecule, where can it go next in the carbon cycle?

A molecule has one carbon-carbon double bond and four monovalent atoms or groups. How many different cis-trans isomers exist for this molecule?

Why is carbon considered a fundamental element in biological molecules?

Which of the following best describes the role of carbon in biological systems?

All living things contain carbon. Which of the following statements about carbon atoms is true?

Which of the following best describes the primary role of carbon in biological systems?

Which of the following best describes the primary role of carbon in biological systems?

Which element accounts for about 20 percent of a human’s total body mass?

A straight-chain carbon compound constructed from __________ must contain at least one carbon-carbon double bond.