Direct-carcinogens includes:

Ethylmethane sulfonate (EMS)

Dimethyl sulfate (DMS)

Nitrogen mustards

TLS Online TPP Program

#Id: 5434

#Unit 7. System Physiology – Animal

In response to a depolarizing stimulus, some of the voltage-gated Na+ channels open and Na+ enters the cell and the membrane is brought to its threshold potential (approximately −55 mV)

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#Id: 7008

#Unit 5. Developmental Biology

 Multipotent adult stem cells play major roles in organisms with high regenerative capabilities, such as hydra, axolotl, and zebrafish.

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#Id: 6445

#Unit 8. Inheritance Biology

To obtain a lod score, we calculate 

the probability of obtaining the observed results under the assumption that the genes are linked with a specified degree of recombination

the probability of obtaining the observed results under the assumption of independent assortment.

TLS Online TPP Program

#Id: 3980

#Unit 2. Cellular Organization

Eukaryotic cells also have type I and type II topoisomerases. The type I enzymes are topoisomerases I and III;

The eukaryotic type II topoisomerases cannot underwind DNA (introduce negative supercoils), but they can relax both positive and negative supercoils.

TLS Online TPP Program

#Id: 8621

#Unit 2. Cellular Organization

The Cip/Kip family members bind to cyclin-bound CDKs and block the activity of cyclin D-, E-, A-, and B-containing complexes.