The tRNAs provide the physical interface between the amino acids being added to the growing polypeptide chain and the codons in the mRNA.

TLS Online TPP Program

#Id: 7098

#Unit 3. Fundamental Processes

In about half the polypeptides, the methionine at the terminus is removed by an aminopeptidase, which creates a new terminus from R2 (originally the second amino acid incorporated into the chain). When both steps are necessary, they occur sequentially. The removal reaction(s) occur rather rapidly when the nascent polypeptide chain has reached a length of 15 amino acids.

TLS Online TPP Program

#Id: 8750

#Unit 1. Molecules and their Interaction Relevant to Biology

The lack of an ordered structure can facilitate a kind of functional promiscuity, allowing one protein to interact with multiple partners. Some intrinsically disordered proteins act to inhibit the action of other proteins by an unusual mechanism: wrapping around their protein targets.

TLS Online TPP Program

#Id: 8422

#Unit 10. Ecological Principles

The difference between the birth rate and the death rate determines the rate of natural increase or decrease

TLS Online TPP Program

#Id: 3022

#Unit 3. Fundamental Processes

DnaB is the helicase that unwinds DNA for replication in E.coli.

TLS Online TPP Program

#Id: 95

#Unit 5. Developmental Biology

Cytoplasmic Determinants

Blastomeres of the early embryo are apportioned a set of critical determination factors within the egg cytoplasm that determine cell fate