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Maps HO A biological molecule is shown here. What is the most likely classification of this molecule? H Question 13 of 19 OH A) bohydrate B) protein C) lipid D) nucleic acid

Maps HO A biological molecule is shown here. What is the most likely classification of this molecule? H Question 13 of 19 OH A) bohydrate B) protein C) lipid D) nucleic acid

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter22: Organic And Biological Molecules
Section: Chapter Questions
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### Educational Website Content #### Understanding Biological Molecule Classification **Question 13 of 19** A biological molecule is shown here. What is the most likely classification of this molecule? **Diagram Description:** - The diagram shows a hexagonal structure with several hydrogen (H) and hydroxyl (OH) groups attached. This structure is characteristic of a steroid, a type of lipid. **Multiple Choice Options:** A) Carbohydrate B) Protein C) Lipid D) Nucleic Acid **Answer Explanation:** The depicted molecule consists of multiple carbon rings fused together, with functional groups such as hydroxyl (-OH) attached to the rings. This structural arrangement is typical of lipids, particularly steroidal lipids, which include hormones like testosterone and cholesterol. ### Answer: C) Lipid #### Key Concepts: - **Carbohydrates**: Composed of carbon, hydrogen, and oxygen, commonly found in ring structures but typically in a different arrangement (e.g., glucose). - **Proteins**: Made up of amino acids and characterized by peptide bonds and complex folding. - **Lipids**: Include a variety of structures like fatty acids and steroids, generally hydrophobic. - **Nucleic Acids**: Include DNA and RNA, comprised of nucleotide chains forming a double helix. Examining molecular structures aids in the identification and classification of biological molecules, a fundamental skill in biochemistry and organic chemistry. --- ### Interactive Section: *Can you identify other lipid structures? Explore our interactive molecular structure tool to learn more!* --- This transcription captures the essence of the diagram and provides a clear educational explanation, ensuring that learners understand the context and reasoning behind the classification of the molecule.
Transcribed Image Text:### Educational Website Content #### Understanding Biological Molecule Classification **Question 13 of 19** A biological molecule is shown here. What is the most likely classification of this molecule? **Diagram Description:** - The diagram shows a hexagonal structure with several hydrogen (H) and hydroxyl (OH) groups attached. This structure is characteristic of a steroid, a type of lipid. **Multiple Choice Options:** A) Carbohydrate B) Protein C) Lipid D) Nucleic Acid **Answer Explanation:** The depicted molecule consists of multiple carbon rings fused together, with functional groups such as hydroxyl (-OH) attached to the rings. This structural arrangement is typical of lipids, particularly steroidal lipids, which include hormones like testosterone and cholesterol. ### Answer: C) Lipid #### Key Concepts: - **Carbohydrates**: Composed of carbon, hydrogen, and oxygen, commonly found in ring structures but typically in a different arrangement (e.g., glucose). - **Proteins**: Made up of amino acids and characterized by peptide bonds and complex folding. - **Lipids**: Include a variety of structures like fatty acids and steroids, generally hydrophobic. - **Nucleic Acids**: Include DNA and RNA, comprised of nucleotide chains forming a double helix. Examining molecular structures aids in the identification and classification of biological molecules, a fundamental skill in biochemistry and organic chemistry. --- ### Interactive Section: *Can you identify other lipid structures? Explore our interactive molecular structure tool to learn more!* --- This transcription captures the essence of the diagram and provides a clear educational explanation, ensuring that learners understand the context and reasoning behind the classification of the molecule.
### Question 12 of 19 #### Which of the following fatty acids would have the highest melting point? A) CH₃(CH₂)₁₆COOH B) CH₃(CH₂)₁₂CH=CHCH₂COOH C) CH₃(CH₂)₁₄CH=CHCOOH D) CH₃(CH₂)₁₀CH=CH(CH₂)₂CH=CHCH₂COOH E) CH₃(CH₂)₁₀COOH --- **Explanation:** The question provides five different fatty acid structures and asks which one would have the highest melting point. The candidates should analyze the chemical structures considering factors such as the length of the carbon chain and the degree of saturation (presence of double bonds). ##### Answer Choices: - **A)** CH₃(CH₂)₁₆COOH - **B)** CH₃(CH₂)₁₂CH=CHCH₂COOH - **C)** CH₃(CH₂)₁₄CH=CHCOOH - **D)** CH₃(CH₂)₁₀CH=CH(CH₂)₂CH=CHCH₂COOH - **E)** CH₃(CH₂)₁₀COOH Factors to Consider: 1. **Chain Length:** Generally, longer carbon chains result in higher melting points due to increased van der Waals forces. 2. **Saturation:** Saturated fatty acids (no double bonds) have higher melting points compared to unsaturated ones (with double bonds) because the kinks created by double bonds decrease the efficiency of packing, thus lowering intermolecular interactions and melting points. Based on these factors, the fatty acid with the longest chain and no double bonds (saturated) will likely have the highest melting point.
Transcribed Image Text:### Question 12 of 19 #### Which of the following fatty acids would have the highest melting point? A) CH₃(CH₂)₁₆COOH B) CH₃(CH₂)₁₂CH=CHCH₂COOH C) CH₃(CH₂)₁₄CH=CHCOOH D) CH₃(CH₂)₁₀CH=CH(CH₂)₂CH=CHCH₂COOH E) CH₃(CH₂)₁₀COOH --- **Explanation:** The question provides five different fatty acid structures and asks which one would have the highest melting point. The candidates should analyze the chemical structures considering factors such as the length of the carbon chain and the degree of saturation (presence of double bonds). ##### Answer Choices: - **A)** CH₃(CH₂)₁₆COOH - **B)** CH₃(CH₂)₁₂CH=CHCH₂COOH - **C)** CH₃(CH₂)₁₄CH=CHCOOH - **D)** CH₃(CH₂)₁₀CH=CH(CH₂)₂CH=CHCH₂COOH - **E)** CH₃(CH₂)₁₀COOH Factors to Consider: 1. **Chain Length:** Generally, longer carbon chains result in higher melting points due to increased van der Waals forces. 2. **Saturation:** Saturated fatty acids (no double bonds) have higher melting points compared to unsaturated ones (with double bonds) because the kinks created by double bonds decrease the efficiency of packing, thus lowering intermolecular interactions and melting points. Based on these factors, the fatty acid with the longest chain and no double bonds (saturated) will likely have the highest melting point.
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