Diphenyltetrazolium bromide, a yellow tetrazole is reduced by metabolically active cells to form insoluble, purple formazan dye crystals detected at 570nm

TLS Online TPP Program

#Id: 8853

#Unit 2. Cellular Organization

Cohesins 

The protein ring complexes that establish linkages between sister chromatids

TLS Online TPP Program

#Id: 10012

#Unit 4. Cell Communication and Cell Signaling

Ptc contains 12 TM α helices and structurally similar

to the Niemann-Pick C1 protein, a cholesterol transporting member of the ABC superfamily

TLS Online TPP Program

#Id: 8088

#Unit 1. Molecules and their Interaction Relevant to Biology

The presence of one or more fatty acids with cis double bonds interferes with this tight packing and results in less stable aggregates.

TLS Online TPP Program

#Id: 8007

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5026

#Unit 3. Fundamental Processes

The rate of bacterial growth is assessed by the doubling time, the period required for the number of cells to double.

The shorter the doubling time, the faster the bacteria are growing.

Escherichia coli growth rates can range from doubling times as fast as 18 minutes to slower than 180 minutes.