Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

23. Lipids

Steroids

GOB Chemistry

23. Lipids

Steroids

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5:01 minutes

Problem 46

Textbook Question

Draw a possible hydrogen bond between a molecule of cholesterol and a molecule of water.

Verified step by step guidance

Identify the functional groups in cholesterol that can participate in hydrogen bonding. Cholesterol contains a hydroxyl (-OH) group, which is capable of forming hydrogen bonds due to the presence of a hydrogen atom bonded to an electronegative oxygen atom.

Understand the nature of hydrogen bonding. A hydrogen bond occurs when a hydrogen atom covalently bonded to an electronegative atom (like oxygen or nitrogen) interacts with another electronegative atom that has lone pairs of electrons.

Locate the water molecule's structure. Water (H₂O) has two lone pairs of electrons on the oxygen atom and two hydrogen atoms that can participate in hydrogen bonding.

Draw the interaction between the hydroxyl group of cholesterol and the water molecule. The hydrogen atom of the hydroxyl group in cholesterol can form a hydrogen bond with one of the lone pairs on the oxygen atom of the water molecule.

Ensure proper orientation in the drawing. The hydrogen bond should be represented as a dashed line between the hydrogen atom of the hydroxyl group in cholesterol and the oxygen atom of the water molecule, showing the interaction clearly.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Hydrogen Bonding

Hydrogen bonding is a type of weak chemical bond that occurs when a hydrogen atom covalently bonded to a highly electronegative atom, such as oxygen or nitrogen, experiences an attraction to another electronegative atom. In the context of cholesterol and water, the hydrogen atoms in water can form hydrogen bonds with the oxygen atoms in cholesterol, facilitating interactions between these molecules.

Cholesterol Structure

Cholesterol is a lipid molecule characterized by a complex structure that includes a hydrophobic steroid ring system and a small hydrophilic hydroxyl group. This unique structure allows cholesterol to interact with both hydrophobic and hydrophilic environments, making it essential for membrane fluidity and stability in biological systems, as well as influencing its interactions with water molecules.

Polarity of Water

Water is a polar molecule, meaning it has a partial positive charge on one side (due to hydrogen atoms) and a partial negative charge on the other side (due to the oxygen atom). This polarity enables water to form hydrogen bonds with other polar molecules, such as cholesterol, which enhances solubility and interaction in biological systems, playing a crucial role in biochemical processes.