Podcast
Questions and Answers
Which of the following is NOT caused by hydrogen bonding?
Which of the following is NOT caused by hydrogen bonding?
- hydronium ions form in water
- NaCl dissolves in water (correct)
- DNA double helix
- ice floats in water
- protein alpha helices
When do Van der Waals (hydrophobic) interactions occur?
When do Van der Waals (hydrophobic) interactions occur?
- a polar molecule interacts with an ion
- two molecules get closer together than they would in a covalent bond (correct)
- a polar molecule with a dipole interacts with another polar molecule
- a random charge fluctuation sets up a transient dipole in a non-ionic molecule
- one ion interacts with an ion of opposite charge
Two molecules with polar covalent bonds are attracted to each other. The resulting bond could be:
Two molecules with polar covalent bonds are attracted to each other. The resulting bond could be:
- Ionic bond
- Van der Waals bond (correct)
- Nonpolar covalent bond
- Polar covalent bond
- Hydrogen bond
Weak bonds are caused by:
Weak bonds are caused by:
Why is it important that most intermolecular interactions in cells are weak bonds?
Why is it important that most intermolecular interactions in cells are weak bonds?
What happens when water hydrates itself?
What happens when water hydrates itself?
To have a dipole moment (to be polar), a molecule must:
To have a dipole moment (to be polar), a molecule must:
Which of the following CANNOT participate in hydrogen bond formation?
Which of the following CANNOT participate in hydrogen bond formation?
The pH inside a bacterial cell is 7. The pH outside is 6. What is the size of the H+ gradient?
The pH inside a bacterial cell is 7. The pH outside is 6. What is the size of the H+ gradient?
Which of the following can serve as a hydrogen bond donor?
Which of the following can serve as a hydrogen bond donor?
Weak bonds are caused by:
Weak bonds are caused by:
A C-C bond in molecule A undergoes a random charge fluctuation. As molecule A comes close to a C-C bond in molecule B, what will happen to molecule B?
A C-C bond in molecule A undergoes a random charge fluctuation. As molecule A comes close to a C-C bond in molecule B, what will happen to molecule B?
The hydrophobic effect is used to explain:
The hydrophobic effect is used to explain:
Which of the following pairs of atoms may be involved in hydrogen-bond formation, either as donor or acceptor?
Which of the following pairs of atoms may be involved in hydrogen-bond formation, either as donor or acceptor?
A difference between strong bonds and weak bonds is that:
A difference between strong bonds and weak bonds is that:
To have a dipole moment (to be polar), a molecule must:
To have a dipole moment (to be polar), a molecule must:
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