During human chromosome rearrangements deletion onto the chromosome 15 in the long arm causes Prader–Willi syndrome.

TLS Online TPP Program

#Id: 7244

#Unit 5. Developmental Biology

B-Cell Development

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#Id: 6762

#Unit 3. Fundamental Processes

The exposed cap is then removed by a decapping enzyme (DCP1/DCP2), unprotected mRNA susceptible to degradation by XRN1, a 5′→3′ exoribonuclease. Removal of the poly(A) tail also makes mRNAs susceptible to degradation by cytoplasmic exosomes containing 3′→5′ exonucleases.

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#Id: 6673

#Unit 3. Fundamental Processes

Splice sites are directional in nature. 5’ splice site -the left, or donor, site and the 3’ splice site - right, or acceptor, site

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#Id: 8386

#Unit 2. Cellular Organization

In the presence of ATP,  myosin head releases from the actin filament. 

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#Id: 668

#Unit 3. Fundamental Processes

Embryonic cells, germ-line cells, and stem cells produce telomerase, but most human somatic cells produce only a small amount of telomerase as they enter S phase.