Extensive shortening of telomeres is recognized by the cell as a double-strand break and consequently triggers cell cycle arrest and apoptosis.

TLS Online TPP Program

#Id: 5750

#Unit 10. Ecological Principles

Dominant species - One that has a large effect in a community because of its abundance or large biomass.

TLS Online TPP Program

#Id: 6764

#Unit 3. Fundamental Processes

The rate of mRNA deadenylation varies inversely with the frequency of translation initiation for an mRNA:  the higher the frequency of initiation, the slower the rate of deadenylation.

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#Id: 5910

#Unit 3. Fundamental Processes

The 3’–OH end is called a primer.

A sequence of RNA is synthesized on the template, so that the free 3’–OH end of the RNA chain is extended by DNA Pol and This is commonly used in replication of cellular DNA and by some viruses.

In case of reteroviruses, A preformed RNA (often a tRNA) pairs with the template, allowing its 3’–OH end to be used to prime DNA synthesis.

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#Id: 2879

#Unit 13. Methods in Biology

Instruments specifically designed to measure turbid samples are nephelometers or Klett meters. 

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#Id: 1229

#Unit 7. System Physiology – Animal

PTH actions on the kidney:

1.  Inhibits phosphate reabsorption

2.  Stimulates Ca2+ reabsorption