Phase 4 (resting membrane potential) averages about −90 millivolts.

TLS Online TPP Program

#Id: 7917

#Unit 2. Cellular Organization

Brown Adipose Tissue

is brown because of the presence of large numbers of mitochondria (high concentrations of cytochromes), with heme groups that are strong absorbers of visible 

TLS Online TPP Program

#Id: 333

#Unit 1. Molecules and their Interaction Relevant to Biology

Fructose 2,6-bisphosphate binds to its allosteric site on PFK-1, it increases the enzyme’s affinity for its substrate fructose 6-phosphate and reduces its affinity for the allosteric inhibitors ATP and citrate

TLS Online TPP Program

#Id: 10430

#Unit 4. Cell Communication and Cell Signaling

SWI/SNF normally plays a role in repressing the E2F genes, inhibiting progression through the cell cycle.

TLS Online TPP Program

#Id: 4840

#Unit 13. Methods in Biology

A type II error appears when the null hypothesis is false but mistakenly fails to be refused.

TLS Online TPP Program

#Id: 5884

#Unit 3. Fundamental Processes

All prokaryotic and eukaryotic DNA polymerases share the same fundamental type of synthetic activity -an antiparallel synthesis from 5’ to 3’ from a template that is 3’ to 5’. This means adding nucleotides one at a time to a 3’–OH end.