Structural studies show that the active site of DNA Pol h is better at accommodating a thymine dimer than is the active site of another translesion DNA polymerase (DNA Pol k

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#Id: 5424

#Unit 7. System Physiology – Animal

Multipolar cells have one axon and many dendrites.

Motor neurons

Hippocampal pyramidal cells with dendrites in the apex and base

Cerebellum Purkinje cells with an extensive dendritic tree in a single plane

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#Id: 6286

#Unit 3. Fundamental Processes

The overall reaction rate for the bacterial RNA polymerase can be as fast as 40–50 nucleotides/ second at 37°C for most transcripts; this is about the same as the rate of translation (15 amino acids/sec), but much slower than the rate of DNA replication (800 bp/sec).

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#Id: 1982

#Unit 3. Fundamental Processes

After transcription initiation, Pol II is paused 30 nucleotides downstream from the initiation site, recruits of the capping enzymes.

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#Id: 8136

#Unit 2. Cellular Organization

Golgi apparatus is a major site of carbohydrate synthesis, as well as a sorting and dispatching station for proteins products.

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#Id: 1566

#Unit 4. Cell Communication and Cell Signaling

Noncanonical pathways can be divided into two types: 

1. The “planar cell polarity” pathway

2. The “Wnt/calcium” pathway