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Questions and Answers
Questions and Answers
What type of bond is stronger than most other intermolecular forces but much weaker than both ionic and covalent bonds?
What type of bond is stronger than most other intermolecular forces but much weaker than both ionic and covalent bonds?
- Hydrogen bond (correct)
- Ionic bond
- Van der Waal's forces
- Covalent bond
What type of interaction stabilizes the a-helical structures of proteins and holds together the two strands of DNA?
What type of interaction stabilizes the a-helical structures of proteins and holds together the two strands of DNA?
- Van der Waal's forces
- Covalent bonds
- Ionic bonds
- Hydrogen bonds (correct)
What is the attraction of the partially positive end of one highly polar molecule for the partially negative end of another highly polar molecule called?
What is the attraction of the partially positive end of one highly polar molecule for the partially negative end of another highly polar molecule called?
- Ionic bond
- Covalent bond
- Van der Waal's forces
- Hydrogen bond (correct)
Which type of bond is characterized by the attraction between the partially positive end (H) of one highly polar molecule and the partially negative end of another highly polar molecule?
Which type of bond is characterized by the attraction between the partially positive end (H) of one highly polar molecule and the partially negative end of another highly polar molecule?
What type of bond is highly directional and strong when the atoms involved are collinear?
What type of bond is highly directional and strong when the atoms involved are collinear?
Which force is stronger than most other intermolecular forces but much weaker than both the ionic and covalent bonds?
Which force is stronger than most other intermolecular forces but much weaker than both the ionic and covalent bonds?
Which force stabilizes the a-helical structures of proteins and holds together the two strands of DNA?
Which force stabilizes the a-helical structures of proteins and holds together the two strands of DNA?
What are Van der Waal’s forces also called?
What are Van der Waal’s forces also called?
Which type of molecules are held together by Van der Waal’s forces?
Which type of molecules are held together by Van der Waal’s forces?
When are Van der Waal’s forces much more important?
When are Van der Waal’s forces much more important?
What do hydrophobic interactions involve?
What do hydrophobic interactions involve?
What do hydrophobic interactions provide in biological systems?
What do hydrophobic interactions provide in biological systems?
What do non-covalent bonds do in biological systems?
What do non-covalent bonds do in biological systems?
What do reversible interactions between substrates and enzymes demonstrate?
What do reversible interactions between substrates and enzymes demonstrate?
What do hydrophobic interactions repel in a polar environment?
What do hydrophobic interactions repel in a polar environment?
What do Van der Waal’s forces contribute to the stability of in biological systems?
What do Van der Waal’s forces contribute to the stability of in biological systems?
Questions and Answers
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Study Notes
Study Notes
Hydrogen Bonds
- Hydrogen bonds are stronger than most other intermolecular forces but much weaker than both ionic and covalent bonds.
- They stabilize the α-helical structures of proteins and hold together the two strands of DNA.
- Hydrogen bonds are characterized by the attraction between the partially positive end (H) of one highly polar molecule and the partially negative end of another highly polar molecule.
Hydrogen Bonding
- Hydrogen bonding is the attraction of the partially positive end of one highly polar molecule for the partially negative end of another highly polar molecule.
- It is highly directional and strong when the atoms involved are collinear.
Van der Waal's Forces
- Van der Waal's forces are also called London dispersion forces.
- They are weak intermolecular forces that hold together non-polar molecules.
- Van der Waal's forces are more important in non-polar molecules or in molecules with a large number of atoms.
Hydrophobic Interactions
- Hydrophobic interactions involve the repulsion of non-polar molecules or groups from a polar environment.
- They provide a stabilizing force in biological systems by allowing non-polar molecules to aggregate and exclude water.
- Hydrophobic interactions are an important aspect of non-covalent bonds in biological systems.
Non-Covalent Bonds
- Non-covalent bonds, including hydrogen bonds, Van der Waal's forces, and hydrophobic interactions, are important for the structure and function of biological molecules.
- They are responsible for the reversible interactions between substrates and enzymes.
Biological Systems
- Non-covalent bonds contribute to the stability of biological structures, such as proteins and DNA, and are essential for the proper functioning of biological systems.
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