Nonsense mutation in one gene of a transcription unit was found to prevent the expression of subsequent genes in the unit even though both genes had their own ribosome binding sites, an effect called polarity.

TLS Online TPP Program

#Id: 7768

#Unit 1. Molecules and their Interaction Relevant to Biology

Atoms are indivisible particles that can't be created or destroyed in a chemical reaction.

TLS Online TPP Program

#Id: 7192

#Unit 5. Developmental Biology

Antigen pieces are held within the binding groove of a cell surface protein called the major histocompatibility complex (MHC) molecule which recognized by T cell

TLS Online TPP Program

#Id: 4581

#Unit 6. System Physiology – Plant

Pr, which to the human eye is blue, is converted by red light to a far-red light–absorbing form called Pfr, which is bluegreen.

TLS Online TPP Program

#Id: 7171

#Unit 5. Developmental Biology

During cleavage, β-catenin enters the nuclei and binds with Tcf3 to form a transcription factor that activates genes encoding proteins Siamois and Twin.

TLS Online TPP Program

#Id: 10290

#Unit 4. Cell Communication and Cell Signaling

T-Cell Development

1.Commitment

2.antigen receptor gene rearrangements

3.The selection and expansion of cells (β-selection