miR-15-a and miR-16-1, control the proliferation of 

B cells

TLS Online TPP Program

#Id: 1402

#Unit 4. Cell Communication and Cell Signaling

Myosin II

Two heads and assembles into bipolar filaments

Small and non-processive

Function- Contraction 

TLS Online TPP Program

#Id: 1403

#Unit 4. Cell Communication and Cell Signaling

Myosin V

Two heads but does not assemble into filaments

Large and processive

Function- Organelle transport

TLS Online TPP Program

#Id: 1404

#Unit 4. Cell Communication and Cell Signaling

All Myosins move toward the (+) end of an actin filament except myosin VI.

TLS Online TPP Program

#Id: 1405

#Unit 4. Cell Communication and Cell Signaling

Myosin VI move toward the (−) end of an actin filament. 

TLS Online TPP Program

#Id: 1406

#Unit 4. Cell Communication and Cell Signaling

The length of the myosin II neck domain determines the rate of movement.

TLS Online TPP Program

#Id: 1407

#Unit 4. Cell Communication and Cell Signaling

In the absence of ATP, the myosin head is firmly attached to the actin filament.