The interphase nuclei of some tissues of the larvae of dipteran flies contain chromosomes that are greatly enlarged relative to their usual condition. They possess both increased diameter and greater length. shows an example of a chromosome set from the salivary gland of D. melanogaster. The members of this set are called polytene chromosomes.

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#Unit 1. Structure and Function of Biomolecules

An induced dipole moment is a temporary condition during which a neutral nonpolar atom (i.e., Helium) undergo a separation of charges due to the environment.

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#Unit 1. Structure and Function of Biomolecules

When an instantaneous dipole atom approaches a neighbouring atom, it can cause that atom to also produce dipoles.

The neighbouring atom is then considered to have an induced dipole moment.

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#Unit 1. Structure and Function of Biomolecules

The potential energy of the dipole-induced dipole interaction is:

α = polarizability of the nonpolar molecule

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#Unit 1. Structure and Function of Biomolecules

#Id: 8263

#Unit 1. Structure and Function of Biomolecules

#Id: 8264

#Unit 1. Structure and Function of Biomolecules

Dispersion or London forces are large networks of intermolecular forces between nonpolar and non-charged molecules and atoms (i.e. alkanes, noble gases, and halogens).