The replicon model proposed two components that controlled the initiation of replication: the replicator and the initiator. The replicator is defined as the cis-acting DNA sequences that are sufficient to direct the initiation of DNA replication.

TLS Online TPP Program

#Id: 8542

#Unit 1. Molecules and their Interaction Relevant to Biology

If the concentration of the enzyme or substrate is increased, the rate of the reaction will be increased as well. 

If the temperature of the enzymes surrounding environment is increased, then the rate of the reaction will also be increased. 

If the substrate concentration is increased then the rate of the reaction will increase. 

If an inhibitor is added then the rate of the reaction will be decreased significantly

TLS Online TPP Program

#Id: 4954

#Unit 6. System Physiology – Plant

Type II phytochromes, these phytochromes are also present in etiolated plants. The reason is that the expression of their mRNAs is not significantly changed by light, and the encoded phyB through phyE proteins are more stable in the Pfr form than is PfrA.

TLS Online TPP Program

#Id: 6893

#Unit 3. Fundamental Processes

There are two de novo methyltransferases (Dnmt3A and Dnmt3B) in the mouse; they have different target sites, and both are essential for development.

TLS Online TPP Program

#Id: 5709

#Unit 7. System Physiology – Animal

FSH & LH

control growth of the ovaries and testes.

TLS Online TPP Program

#Id: 10035

#Unit 4. Cell Communication and Cell Signaling

NF-κB signaling is turned off by negative feedback

regulation because one of the genes whose transcription is induced by NF-κB encodes I-κBα.