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.

TLS Online TPP Program

#Id: 8879

#Unit 2. Cellular Organization

This combination of two positive feedback loops:

one that activates a CDK1 activator (Cdc25C)

one that inhibits a CDK1 inhibitor (Wee1)

results in the abrupt and irreversible transition from G2 into mitosis.

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#Id: 7056

#Unit 11. Evolution and Behavior

Van Valen law - he found a surprising result: rather straight curves, implying that the probability of extinction is roughly constant.

TLS Online TPP Program

#Id: 3513

#Unit 2. Cellular Organization

In the fruit fly, gene sizes have a bimodal distribution—many are short but some are quite long

TLS Online TPP Program

#Id: 7911

#Unit 2. Cellular Organization

MCSs also serve as interfaces for the transfer of ions (Ca+2 ) and small molecules (glycerophospholipids) between the ER and mitochondria.

TLS Online TPP Program

#Id: 4674

#Unit 13. Methods in Biology

One limitation of rocket electrophoresis is the need for the antigen to be negatively charged for electrophoretic movement within the agar matrix