TLS Online TPP Program

#Id: 9617

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 2349

#Unit 3. Fundamental Processes

RNA polymerase starts most transcripts with an A, and that ribonucleotide binds the template nucleotide (T) with only two hydrogen bonds (as opposed to the three between C and G).

TLS Online TPP Program

#Id: 5728

#Unit 10. Ecological Principles

The evapotranspiration rate is in turn influenced by the amount of solar energy and the amount of water in the ground.

TLS Online TPP Program

#Id: 7582

#Unit 5. Developmental Biology

The membrane potential of the sperm cell becomes more negative as potassium ions leave the sperm. 

TLS Online TPP Program

#Id: 3012

#Unit 3. Fundamental Processes

A helicase usually initiates unwinding at a single-stranded region adjacent to a duplex. Note that it cannot unwind a segment of duplex DNA; it can only continue to unwind a sequence that has been started.