Antibody and soluble antigen interacting in aqueous solution form a lattice that eventually develops into a visible precipitate. Antibodies that aggregate soluble antigens are called precipitins

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#Id: 1897

#Unit 4. Cell Communication and Cell Signaling

Three signals are required for activation of a naïve T cell

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#Id: 4246

#Unit 12. Applied Biology

Serum in culture media regulates cell membrane permeability and serves as a carrier for lipids, enzymes, micronutrients, and trace elements into the cell. 

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#Id: 2540

#Unit 13. Methods in Biology

In PCR, the primer length influences the rate at which primer molecules pair with template DNA; this rate decreases as the primer length increases.

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#Id: 5043

#Unit 3. Fundamental Processes

Dam (Dam-) mutants accumulates hemimethylated products after replication.

If the plasmid is methylated, it undergoes a single round of replication, and then the hemimethylated products accumulate.

Suggesting that a hemimethylated origin cannot be used to initiate a replication cycle.

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#Id: 7968

#Unit 10. Ecological Principles

  Hydrologic cycle