Phytochrome is most heavily concentrated in the regions where dramatic developmental changes are occurring: the apical meristems of the epicotyl and root.

TLS Online TPP Program

#Id: 2111

#Unit 8. Inheritance Biology

Heterozygous condition may produce imbalances in the amounts of gene products similar to those produced by extra gene copies.

TLS Online TPP Program

#Id: 8940

#Unit 2. Cellular Organization

Knl1 eliminating checkpoint protein binding sites at kinetochores. p31comet disassembles the MCC, allowing APC/Ccdc20 to degrade mitotic cyclins and securin to trigger anaphase.

TLS Online TPP Program

#Id: 5375

#Unit 10. Ecological Principles

Mark-recapture technique can have drawbacks;

1. Some animals that have been marked may learn to avoid the traps. 
2. Recapture rates will then be low, resulting in an overestimate of population size.

TLS Online TPP Program

#Id: 8446

#Unit 1. Molecules and their Interaction Relevant to Biology

In the α helix, the backbone hydrogen bonds are arranged such that the peptide CO bond of the nth residue points along the helix axis toward the peptide NH group of the (n + 4)th residue. 

TLS Online TPP Program

#Id: 10294

#Unit 4. Cell Communication and Cell Signaling