Phosphorylated rhodopsin is restored to its light-sensitive state (R) during dark adaptation by a specific rhodopsin phosphatase

TLS Online TPP Program

#Id: 9133

#Unit 10. Ecological Principles

Many species of macroparasites cannot complete their life cycles without the presence of at least two different host species

Definitive host - Exhibit sexual reproduction 

Intermediate hosts – Nonreproducing

TLS Online TPP Program

#Id: 7370

#Unit 5. Developmental Biology

Gap genes encode transcription factors, and differing combinations and concentrations of gap gene proteins regulate the transcription of pair-rule genes, which divide the embryo into periodic units.

TLS Online TPP Program

#Id: 5758

#Unit 10. Ecological Principles

Principle of species individuality

TLS Online TPP Program

#Id: 7853

#Unit 1. Molecules and their Interaction Relevant to Biology

Thus, D glucose in aqueous solution exists as an equilibrium mixture of 5 compounds. The pyranose form predominates in solution.

aD glucofuranose (0.5%)

aD-glucopyranose (37%)

aldehydo- -glucose (0.003%)

bD-glucofuranose (0.5%)

bD-glucopyranose (62%)

TLS Online TPP Program

#Id: 1878

#Unit 10. Ecological Principles

K1<K2/β  and K1/α>K2- The two species coexist.