Do London dispersion forces play a role in biological replication?

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In summary, James Watson's Nobel Prize lecture discusses the discovery of the double helix structure of DNA and how it brought great relief and allowed for a serious proposal of the mechanism of gene duplication. This replication scheme involves conventional chemical forces, unlike the previously proposed long-range forces arising from quantum mechanical resonance interactions. These forces, proposed by physicist Pascual Jordan, were later discredited and replaced by the concept of London dispersion forces, which are derived from the regular electromagnetic interaction. The existence of long-range forces in the context of biological molecules is still a topic of research in electronic structure theory.
  • #1
Eagle9
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Excerpt from James Watson’s Nobel Prize lecture called The involvement of RNA in the synthesis of proteins:
The finding of the double helix thus brought us not only joy but great relief. It was unbelievably interesting and immediately allowed us to make a serious proposal for the mechanism of gene duplication. Furthermore, this replication scheme involved thoroughly understood conventional chemical forces. Previously, some theoretical physicists, among them Pascual Jordan, had proposed that many biological phenomena, particularly gene replication, might be based on still undiscovered long-range forces arising from quantum mechanical resonance interactions. Pauling thoroughly disliked this conjecture and firmly insisted that known short-range forces between complementary surfaces would be the basis of biological replication.
Source, page 2
I would like to know the nature of these forces, what means “long-range forces arising from quantum mechanical resonance interactions”? As far as I know there are 4 types of fundamental interactions in physics:
1. Strong
2. Electromagnetic
3. Weak
4. Gravitation
And that hypothetical force was (more precisely some physicists thought that it was) the part of one of these fundamental interactions or how? Or maybe it was something absolutely new understanding/idea in physics? Can such force exist in nature (perhaps not in living cell), at least in theory? :rolleyes:
 
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  • #2
Maybe it's meant an hypothetical force arising in entanglement ?
 
  • #3
Searching the net, I get the impression that Jordan proposed genetic replication involved an attraction force, not a complement process as would be discovered later. The 'long-range' aspect meant within a system of molecules.

Jordan argued that heredity required the duplication of a molecular structure and that this duplication could be specifically carried out through the formation of a symmetric dimer in which like parts of a molecule would be attracted to like parts of its dimeric counterpart through a quantum mechanical resonance interaction. The attraction, according to Jordan, arises through the combined thermal and quantum fluctuations of the electronic structure of the molecule. These attractions are stronger if the two molecules have the same excitation spectrum.

Source: www.pnas.org/content/93/25/14249.long
 
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  • #4
TumblingDice
Jordan argued that heredity required the duplication of a molecular structure and that this duplication could be specifically carried out through the formation of a symmetric dimer in which like parts of a molecule would be attracted to like parts of its dimeric counterpart through a quantum mechanical resonance interaction. The attraction, according to Jordan, arises through the combined thermal and quantum fluctuations of the electronic structure of the molecule. These attractions are stronger if the two molecules have the same excitation spectrum.
Ok, and does such phenomenon really exists in Physics? :rolleyes:
 
  • #5
Eagle9 said:
Ok, and does such phenomenon really exists in Physics? :rolleyes:

I thought you were asking for help understanding what the meaning was in your OP:
what means "long-range forces arising from quantum mechanical resonance interactions"?

As to whether it really exists, it was speculation when Jordan suggested it, and nothing more. The only references I could find to this today are crackpot snake-oil healers promoting bio-rhythms. Hope you understand what that means. :wink:
 
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  • #6
Well, semi-long-ranged forces which ARE essential for biological molecules and result from "thermal and/or quantum fluctuations of the electronic structure" do in fact exist. They are called London dispersion forces (or if you like mystically sounding physicsy terms, then also "the Casimir effect", which is the same thing). Dealing with them effectively in the context of density functional theory is a important topic of current research in electronic structure theory.

Contrary to the mystic sounding description with "quantum fluctuations", these are really just the effective interactions between individually fluctuating electric charge distributions, and they are thus derived quantities from the regular electromagnetic interaction (and not a fundamental force per se).
 

1. What are long-range forces?

Long-range forces are interactions between particles or objects that act over a distance, rather than through physical contact. Examples include gravity, electromagnetism, and the strong and weak nuclear forces.

2. How do long-range forces work?

Long-range forces are mediated by particles called force carriers, which transmit the force between particles. These force carriers are exchanged continuously between particles, allowing the force to act over a distance.

3. Can long-range forces exist in a vacuum?

Yes, long-range forces can exist in a vacuum. In fact, these forces are strongest in a vacuum because there is no interference from other particles or objects.

4. Do long-range forces only act between large objects?

No, long-range forces can act between any two particles or objects, regardless of their size. However, the strength of the force depends on the masses and charges of the particles involved.

5. Are long-range forces stronger than short-range forces?

The strength of a force depends on several factors, such as the distance between the interacting particles and their properties. While long-range forces can act over a larger distance, they may not necessarily be stronger than short-range forces. It ultimately depends on the specific situation and the particles involved.

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