XP patients cannot excise pyrimidine dimers and other bulky adducts. Mutations occur in one of eight genes called XPA to XPG

TLS Online TPP Program

#Id: 1204

#Unit 7. System Physiology – Animal

Estrogens inhibit osteoclastic activity in the bones and therefore stimulate bone growth.

TLS Online TPP Program

#Id: 5457

#Unit 7. System Physiology – Animal

The number of Na + channels per square micrometer of membrane in myelinated mammalian neurons has been estimated: 

50–75 in the cell body, 350–500 in initial segment, less than 25 on the surface of the myelin, 2000–12,000 at the nodes of Ranvier & 20–75 at the axon terminals 

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#Id: 6899

#Unit 3. Fundamental Processes

5-hydroxymethylcytosine (5hmC) is now novel epigenetic marks. The “teneleven translocation 1-3” or Tet1-3 proteinsare DNA TET hydroxylase enzymes that can convert 5mC to 5hmC, and can further convert 5hmC to 5-formylcytosine (5fC) and then 5- carboxylcytosine (5caC) in successive reactions.

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#Id: 1866

#Unit 10. Ecological Principles

Amensalism- One species has a strong effect on another, but the reverse effect is negligible.

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#Id: 4519

#Unit 13. Methods in Biology