Three major classes of animal-cell junctions: 

1. Anchoring junctions

2. Tight junctions

3. Gap junctions

TLS Online TPP Program

#Id: 6691

#Unit 3. Fundamental Processes

In C. elegans, about 70% of genes are processed by the trans-splicing mechanism

TLS Online TPP Program

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#Unit 4. Cell Communication and Cell Signaling

Negative costimulation

TLS Online TPP Program

#Id: 9358

#Unit 4. Cell Communication and Cell Signaling

Active type I receptor kinase phosphorylates a Smad

TLS Online TPP Program

#Id: 5450

#Unit 7. System Physiology – Animal

The absolute refractory period overlaps with almost the entire duration of the action potential. During this period, no matter how great the stimulus, another action potential cannot be elicited.

TLS Online TPP Program

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#Unit 3. Fundamental Processes

This ATPase activity of Dna A is stimulated by membrane phospholipids and single-stranded DNA.