<prompt> Which of the following is true regarding lattice formation?Associated with precipitation and not agglutinationAssociated with agglutination and not precipitationAssociated with bothNeither associated with precipitation nor agglutination  <response>: Marrack proposed the lattice hypothesis to explain the mechanism of precipitation. Precipitation results when a large lattice is formed consisting of alternating antigen and antibody molecules. This is possible only in the zone of equivalence. The lattice hypothesis holds good for agglutination also.Ref: Ananthanarayan 9th edition, p105 