Promoters that do not contain a TATA element are called TATA-less promoters. Surveys of promoter sequences suggest that 50% or more of promoters may be TATA-less.

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#Id: 6057

#Unit 10. Ecological Principles

Hot Desert  Temperatures are variable from below freezing at night to as much as 50ºC in the day. algae carry on photosynthesis and provide both themselves and the coral animals with the nutrients necessary for growth. 

The skeletons of the corals provide a surface upon which many other kinds of animals live.

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#Id: 9879

#Unit 4. Cell Communication and Cell Signaling

Antimicrobial peptide

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#Id: 4967

#Unit 6. System Physiology – Plant

Change surface charge

Red light causes a depolarization of membranes and far-red reverses or even causes a slight hyperpolarization.

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#Id: 5569

#Unit 7. System Physiology – Animal

Meanwhile, hypotonic fluid  flows into the distal tubule, andisotonic and subsequently hypertonic fluid flows into the

ascending thick limb

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#Id: 7879

#Unit 2. Cellular Organization

The curvature of the crista junctions is due to a protein complex called MICOS (mitochondrial contact site and cristae organizing system).