Molecular Interactions
Molecular Interactions - Related Videos
11:16
A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling
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Cited by 6 •
2017
The described hydroponic cocultivation system supports intact plants with metal mesh screens and cocultivates them with bacteria. Plant tissue, bacteria, and secreted molecules can then be separately harvested for downstream analyses, simultaneously allowing for the molecular responses of both plant hosts and interacting microbes or microbiomes to be investigated.
06:15
Interactive Molecular Model Assembly with 3D Printing
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Cited by 4 •
2020
Physical modeling of microscopic systems helps obtain insights that are difficult to gain by other means. To facilitate the construction of physical molecular models, we demonstrate how 3D printing can be used to assemble functional macroscopic models that capture qualities of molecular systems in a tactile way.
02:54
Molecular and Ionic Solids
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2020
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions. Molecular Solids Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
02:35
Molecular Orbital Theory I
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2020
Overview of Molecular Orbital Theory Molecular orbital theory describes the distribution of electrons in molecules in the same way as the distribution of electrons in atoms is described using atomic orbitals. Quantum mechanics describes the behavior of an electron in a molecule by a wave function, Ψ, analogous to the behavior in an atom. Just like electrons around isolated atoms, electrons around atoms in molecules are limited to discrete (quantized) energies. The region of space in which a...
03:28
A Co-Cultivation System to Study the Molecular Responses of Plant Hosts and Interacting Bacteria
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2025
Source: Nathoo, N., et al. A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling. J. Vis. Exp. (2017).This video demonstrates a hydroponic co-cultivation system for studying plant–bacteria interactions under sterile conditions. Plant seedlings are transferred into a sterile, acidic growth medium, incubated, and inspected for contamination before inoculation with Agrobacterium. The activated bacteria attach to plant...
FAQs
Covalent bonds establish strong molecular connections, whereas hydrogen bonds, electrostatic attraction, van der Waals forces, and hydrophobic effects commonly support dynamic biological recognition and association. This distinction helps explain why biomolecules can maintain defined structures while still changing partners or responding to conditions. Researchers therefore consider both bond formation and weaker collective forces when interpreting biological function.
Shape controls whether interacting molecules can contact one another in a compatible way. A suitable three-dimensional arrangement allows relevant forces to act at the appropriate locations, influencing recognition and binding. This principle connects molecular structure to enzyme catalysis, DNA recognition, and cell signaling, where selective interactions help produce particular biological outcomes rather than indiscriminate association.
Interaction strength and biological outcomes depend not only on molecular properties but also on concentration and the surrounding environment. Changes in these factors can alter how often molecules encounter one another and how effectively their attractive or repulsive forces operate. Considering these variables is essential when explaining differences in binding, molecular organization, or signaling behavior.
A useful analysis begins by identifying the molecules involved, then asking which forces could connect or separate them. Researchers can relate those forces to molecular shape, concentration, and environmental conditions before examining the resulting function, such as catalysis, folding, recognition, membrane assembly, or signaling. This framework helps connect molecular-level behavior with larger biological processes.
In enzymes, interactions between molecules help establish recognition and influence catalytic function. Within proteins, the same broad classes of forces contribute to folding and the resulting molecular organization. Examining these roles allows biology researchers to connect a protein’s interactions with its structure and activity, providing context for understanding how altered molecular behavior may affect biological function.
Disease mechanisms can involve changes in how biological molecules recognize, bind, or influence one another. Studying these interactions helps researchers relate molecular behavior to abnormal function and identify opportunities for pharmaceutical design. The same principles also support investigation of DNA recognition, membrane assembly, and cell signaling, extending their relevance beyond a single molecular or cellular process.