Question 1

A solvent with a low dielectric constant would be a ____________ solvent for salts.

Accepted Answer

poor

Question 2

Choose the correct answer from the list below. Not all of the answers will be used.
-Electrostatic interactions between atoms with opposite electrical charges are also called ____________.

Accepted Answer

Ionic bonds or salt bridges are formed due to electrostatic interactions between atoms (or molecules) with opposite electrical charges.

Question 3

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The type of bond found between an oxygen on one water molecule and hydrogen on a different water molecule.

Accepted Answer

Hydrogen bonds are the type of bond found between an oxygen atom on one water molecule and a hydrogen atom on a different water molecule. This is due to the partial positive charge of the hydrogen and the partial negative charge of the oxygen, allowing them to attract each other.

Question 4

Lipids that interact with both the water and the hydrophobic regions of the membrane are considered ____________.

Accepted Answer

The answer of Lipids that interact with both the water...

Question 5

The source of the key buffering component of blood is ____________.

Accepted Answer

The answer of The source of the key buffering component...

Question 6

The transient force which, while weak, still has a large impact on how macromolecules interact is the ____________.

Accepted Answer

The answer of The transient force which, while weak, still...

Question 7

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The charge of the side group of aspartate when the pH is more than one pH unit above the pKa.

Accepted Answer

Aspartate has a carboxyl side group that deprotonates to become negatively charged when the pH is more than one pH unit above its pKa.

Question 8

Choose the correct answer from the list below. Not all of the answers will be used.
-The distance when two atoms no longer repulse each other yet have the strongest attraction is known as the____________ radii or contact distance.

Accepted Answer

The distance when two atoms no longer repulse each other yet have the strongest attraction is known as the van der Waals radii or contact distance. This term refers to the optimal distance between non-bonded atoms or molecules where the potential energy is at its minimum, allowing for the maximum attraction without the atoms being bonded.

Question 9

Buffers are critical in maintaining proper ____________ levels in biological systems.

Accepted Answer

The answer of Buffers are critical in maintaining proper ____________...

Question 10

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: Thermodynamic force that drives hydrophobic interactions.

Accepted Answer

Entropy is the thermodynamic force that drives hydrophobic interactions. This is because the organization of water molecules around hydrophobic substances increases the system's entropy by allowing water molecules more freedom when hydrophobic molecules aggregate.

Question 11

Choose the correct answer from the list below. Not all of the answers will be used.
-Water weakens the electrostatic interaction of ions due to its high ____________.

Accepted Answer

Water weakens the electrostatic interaction of ions due to its high dielectric constant. This property allows water to effectively separate and surround ions, reducing the strength of their electrostatic interactions.

Question 12

When the pH is more than two pH units above the pKa of a carboxyl group, the acid is ____________.

Accepted Answer

The answer of When the pH is more than two...

Question 13

Choose the correct answer from the list below. Not all of the answers will be used.
-Movement of particles due to the random fluctuations of energy content of the environment is known as ____________.

Accepted Answer

Brownian motion describes the random movement of particles in a fluid (liquid or gas) as they collide with other particles. This phenomenon is due to the energy fluctuations in the environment.

Question 14

Hydrophobic molecules are driven together by ____________, not because they have an affinity for each other.

Accepted Answer

The answer of Hydrophobic molecules are driven together by ____________,...

Question 15

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: A molecule with two distinctive chemical properties or characteristics.

Accepted Answer

An amphipathic molecule has both hydrophilic (water-attracting) and hydrophobic (water-repelling) properties.

Question 16

Molecules that are readily soluble in water are considered ____________.

Accepted Answer

The answer of Molecules that are readily soluble in water...

Question 17

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The charge of an amino group when the pH is one pH unit below the pKa.

Accepted Answer

The amino group (-NH2) acts as a base, accepting a proton to become -NH3+ when the pH is below its pKa, thus carrying a positive charge.

Question 18

Choose the correct answer from the list below. Not all of the answers will be used.
-Which type of amino acids are responsible for increasing entropy as a protein folds?

Accepted Answer

The answer of Choose the correct answer from the list...

Question 19

The force that is quantified by Coulomb's law is called the ____________.

Accepted Answer

The answer of The force that is quantified by Coulomb's...

Question 20

An acid ionizes to form a proton and its ________________.

Accepted Answer

The answer of An acid ionizes to form a proton...

Quiz 2: Water, Weak Bonds, and the Generation of Order Out of Chaos

A solvent with a low dielectric constant would be a ____________ solvent for salts.

Choose the correct answer from the list below. Not all of the answers will be used. -Electrostatic interactions between atoms with opposite electrical charges are also called ____________.

Choose the correct answer from the list below. Not all of the answers will be used. -____________: The type of bond found between an oxygen on one water molecule and hydrogen on a different water molecule.

Lipids that interact with both the water and the hydrophobic regions of the membrane are considered ____________.

The source of the key buffering component of blood is ____________.

The transient force which, while weak, still has a large impact on how macromolecules interact is the ____________.

Choose the correct answer from the list below. Not all of the answers will be used. -____________: The charge of the side group of aspartate when the pH is more than one pH unit above the pKa.

Choose the correct answer from the list below. Not all of the answers will be used. -The distance when two atoms no longer repulse each other yet have the strongest attraction is known as the____________ radii or contact distance.

Buffers are critical in maintaining proper ____________ levels in biological systems.

Choose the correct answer from the list below. Not all of the answers will be used. -____________: Thermodynamic force that drives hydrophobic interactions.

Choose the correct answer from the list below. Not all of the answers will be used. -Water weakens the electrostatic interaction of ions due to its high ____________.

When the pH is more than two pH units above the pKa of a carboxyl group, the acid is ____________.

Choose the correct answer from the list below. Not all of the answers will be used. -Movement of particles due to the random fluctuations of energy content of the environment is known as ____________.

Hydrophobic molecules are driven together by ____________, not because they have an affinity for each other.

Choose the correct answer from the list below. Not all of the answers will be used. -____________: A molecule with two distinctive chemical properties or characteristics.

Molecules that are readily soluble in water are considered ____________.

Choose the correct answer from the list below. Not all of the answers will be used. -____________: The charge of an amino group when the pH is one pH unit below the pKa.

Choose the correct answer from the list below. Not all of the answers will be used. -Which type of amino acids are responsible for increasing entropy as a protein folds?

The force that is quantified by Coulomb's law is called the ____________.

An acid ionizes to form a proton and its ________________.