Quantitative trait loci (QTLs)- Chromosomal regions containing genes that influence a quantitative trait.

TLS Online TPP Program

#Id: 5028

#Unit 3. Fundamental Processes

The replication cycle can be defined in terms of two constants: C and D

C is the fixed time of 40 minutes required to replicate the entire E.coli chromosome. Its duration corresponds to a rate of replication fork movement of 50,000 bp/minute.

D is the fixed time of 20 minutes that elapses between the completion of a round of replication and the cell division with which it is connected. This period may represent the time required to assemblethe components needed for division.

TLS Online TPP Program

#Id: 2737

#Unit 13. Methods in Biology

Nuclear run-on transcription is a way of ascertaining which genes are active in a given cell by allowing transcription of these genes to continue in isolated nuclei.

TLS Online TPP Program

#Id: 6665

#Unit 3. Fundamental Processes

There are three type of Splicing Machinery

TLS Online TPP Program

#Id: 10291

#Unit 4. Cell Communication and Cell Signaling

The second phase of T-cell development

1.Positive selection: Selection for those cells whose T-cell receptors engage self-MHC.

2.Negative selection: Selection against those cells whose T-cell receptors bind too strongly to self-peptide/MHC combinations.

3.Lineage commitment: Commitment of thymocytes to effector cell lineages, including CD4 helper or CD8 cytotoxic populations

TLS Online TPP Program

#Id: 10239

#Unit 6. System Physiology – Plant

ABA was originally thought to induce abscission, however, abscission is regulated by ethylene rather than ABA.