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Home » Elements of Life » Exploring the molecular pathways and physiological importance of carbon, nitrogen, and phosphorus in dierent biological systems has highlighted their contributions to life’s fundamental processes. Carbon forms the framework of biological molecules, nitrogen is critical for proteins and nucleic acids, and phosphorus is essential for nucleic acids, membrane structure, and energy metabolism. Cellular membranes contain phospholipids which provide structure and specic physiological characteristics to support the molecular pathways of the cell. Which of the following models represents the correct arrangement of phosphorus within a phospholipid?
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Top Questions
- The covalent bonds within water molecules are described as polar covalent bonds. Which of the following best explains why the covalent bonds within water are polar?
- Water is known as a cohesive molecule due to the presence of hydrogen bonding. Water is also adhesive to other molecules. Which of the following does not use these properties of water to function?
- Nitrogen is a key part of building biomass because of its presence in all amino acids and therefore proteins. Which of the following best describes nitrogen within a protein?
- Water molecules are composed of the atoms hydrogen and oxygen, which are held together by covalent and hydrogen bonds. Which of the following models best demonstrates the arrangement of hydrogen bonds between water molecules? (Hydrogen bonds are depicted by dashed lines.)
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