Stem cell niches in the testes of male Drosophila illustrate the importance of local signals, cell-to-cell adhesion, and asymmetric cell division.

TLS Online TPP Program

#Id: 4627

#Unit 13. Methods in Biology

A modification of the agglutination reaction, called agglutination inhibition, provides a highly sensitive assay for small quantities of an antigen. For example, one of the early types of home pregnancy test kits included latex particles coated with human chorionic gonadotropin (HCG) and antibody to HCG.

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#Id: 5436

#Unit 7. System Physiology – Animal

The membrane potential moves toward the equilibrium potential for Na+ (+60 - +65mV) but does not reach it during the action potential, because the increase in Na+ conductance is short-lived.

TLS Online TPP Program

#Id: 6930

#Unit 8. Inheritance Biology

Large aberrations can be detected by examination of mitotic chromosomes that have been stained with banding agents such as quinacrine or Giemsa.

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#Id: 8299

#Unit 1. Molecules and their Interaction Relevant to Biology

The Eisenthal and Cornish-Bowden plot at constant v0 and [S0], a plot of V max against Km is linear.

TLS Online TPP Program

#Id: 6889

#Unit 3. Fundamental Processes

Xic is a cis-acting locus that contains the information necessary to count X chromosomes and inactivate all copies but one. Inactivation spreads from Xic along the entire X chromosome.