Allolactose binds to the Lac repressor and triggers a change in the shape (conformation) of that protein. 

TLS Online TPP Program

#Id: 5181

#Unit 7. System Physiology – Animal

Hemostasis is the process of forming clots in the walls of damaged blood vessels and preventing blood loss while maintaining blood in a fluid state within the vascular system.

TLS Online TPP Program

#Id: 8987

#Unit 11. Evolution and Behavior

Allele frequency when genotype frequency is given

TLS Online TPP Program

#Id: 6499

#Unit 3. Fundamental Processes

RNA polymerase II terminates after a short distance; small oligonucleotides of 4–5 nt are unstable; crystal structures of these RNA/DNA hybrids are unordered. Only longer hybrids have proper base pairing. The short RNA products are degraded rapidly. The suggestion is that this abortive initiation is a form of promoter proofreading.

TLS Online TPP Program

#Id: 5837

#Unit 10. Ecological Principles

Sequential changes in community structure over physical distance, primarily influenced by time, constitute a chronosequence

TLS Online TPP Program

#Id: 2349

#Unit 3. Fundamental Processes

RNA polymerase starts most transcripts with an A, and that ribonucleotide binds the template nucleotide (T) with only two hydrogen bonds (as opposed to the three between C and G).