Nuclear export mechanism are of two types:

Ran-dependent nuclear export

Ran-independent nuclear export

TLS Online TPP Program

#Id: 10518

#Unit 4. Cell Communication and Cell Signaling

Caspases function as homodimers with one domain of each stabilizing the active site of the other; they mediate apoptosis by proteolytic cleavage of selected substrates

TLS Online TPP Program

#Id: 10472

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 7360

#Unit 11. Evolution and Behavior

N1=2000(source)  G1=0.8   G2=0.2

N2=5000(recipient)  G1=0.3   G2=0.7

100 individual migrate N1 to N2

Alleles frequency in recipient? 

TLS Online TPP Program

#Id: 3515

#Unit 2. Cellular Organization

A mutation that confers a more advantageous phenotype to an organism, relative to Individuals in the same population without the mutation, is positive selection of that organism.

TLS Online TPP Program

#Id: 942

#Unit 5. Developmental Biology

Two major mechanisms during fertilization in sea urchin:

Species-specific sperm attraction 

Species-specific sperm activation