20 Questions
Why do amphipathic molecules like soaps and detergents aggregate in water?
To expose their hydrophilic parts to water and remove the hydrophobic parts from water
Which type of solution has a pH value of less than 7 according to the text?
Acidic solution
What is the role of acids in modifying the concentration of H+ ions in a solution?
Increase the H+ concentration
In what type of solution do hydrophobic substances tend to aggregate?
Basic solution
How is the pH of a solution defined?
Negative logarithm of H+ concentration
Which type of molecule forms micelles in water when placed in it?
Soaps and detergents
What type of substances dissolve readily in water?
Hydrophilic substances
What happens when water cannot interact favorably with a molecule?
It forms highly organized clathrate structures around the molecule.
What is the term used for molecules with significantly hydrophilic and hydrophobic parts?
Amphipathic
Why do hydrophobic molecules not dissolve well in water?
Water molecules surround them with clathrate structures.
Which type of regions on a protein's surface attract water molecules?
Ionic and polar regions
What kind of interactions are responsible for the dissolving of hydrophilic substances in water?
Noncovalent interactions
Why do oil molecules repel water?
Because they have nonpolar bonds
Which term describes a stable suspension of fine particles in a liquid?
Colloid
What type of substances have an affinity for water?
Hydrophilic substances
Why do hydrophobic molecules not dissolve in water easily?
Because they are nonpolar and repel water
What characteristic of a substance makes it hydrophilic?
Forming hydrogen bonds with water
Which property allows water to dissolve many salts and polar molecules?
Hydrogen bonding potential
Why does ice float in liquid water?
Because ice is less dense than liquid water due to more ordered hydrogen bonds
What property of water helps stabilize temperatures in organisms and bodies of water through evaporative cooling?
High heat of vaporization
Learn about the behavior of lysozyme molecules in aqueous and nonaqueous environments. Understand how ionic and polar regions on the protein's surface interact with water molecules.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
