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TLS Online TPP Program

#Id: 6296

The start point is usually (90% of the time) a purine. It is common for the start point to be the central base in the sequence CAT, but the conservation of this triplet is not great enough to regard it as an obligatory signal.

#Unit 3. Fundamental Processes #Prokaryotic Transcription #Part B Pointers
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TLS Online TPP Program

#Id: 8972

#Unit 11. Evolution and Behavior

Gene Structure
The genes that code for many proteins are broken into pieces. These pieces—the exons—are separated by stretches of noncoding DNA—the introns
TLS Online TPP Program

#Id: 8973

#Unit 11. Evolution and Behavior

The current record holder is the gene Dscam in Drosophila. Alternative splicing of its 95 exons could potentially produce more than 38,000 kinds of proteins from this single gene.
TLS Online TPP Program

#Id: 8974

#Unit 11. Evolution and Behavior
TLS Online TPP Program

#Id: 8975

#Unit 11. Evolution and Behavior
TLS Online TPP Program

#Id: 8976

#Unit 11. Evolution and Behavior

Rate of evolution = Number of amino acid different / Total time
Hint:  Total time = 2xT
Rate of Change per amino acid per year = rate of evolution / total amino acid
TLS Online TPP Program

#Id: 8977

#Unit 11. Evolution and Behavior

Molecular clock - The concept of a steady rate of change in DNA sequences over time.