The loop region of the beacon is designed to bind specifically to a target nucleic acid. Thus, in the presence of the target nucleic acid, the stem region of the beacon becomes separated, releasing the fluorophore from the quencher such that active fluorescence can be observed.

TLS Online TPP Program

#Id: 2257

#Unit 11. Evolution and Behavior

Underdominance, in which the heterozygote has lower fitness than both homozygotes.

TLS Online TPP Program

#Id: 2911

#Unit 13. Methods in Biology

Since 3600 equals 2 radians, one revolution of the rotor can be expressed as 2 rad.

TLS Online TPP Program

#Id: 10540

#Unit 4. Cell Communication and Cell Signaling

PKB phosphorylates Bad, and phosphorylated Bad forms a complex with a cytosolic 14-3-3 protein.

TLS Online TPP Program

#Id: 9930

#Unit 4. Cell Communication and Cell Signaling

Variation in Influenza Strains

Antigenic variation in HA and NA is generated by

Antigenic drift involves a series of spontaneous point mutations that occur gradually.

Antigenic shift results in the sudden emergence of a new subtype of influenza.

TLS Online TPP Program

#Id: 5735

#Unit 10. Ecological Principles

Communities in Climatically Similar Habitats May Themselves Be Similar in Species Richness

A stable community changes little in species richness over time