TFIIE -80 to +30 For bacterial RNA polymerase, only the sigma factor is needed for the enzyme to recognize the promoter. The eukaryotic transcription factors may indeed act as sigma factors to allow the eukaryoitic RNA polymerase to recognize the promoter.
An energy pyramid is the graphical representation of the trophic levels (nutritional) by which the incoming solar energy is transferred into an ecosystem.The source of energy for living beings on Earth is the Sun.The energy that the Sun emits at present is of 1366.75 W/m^2 (400 years ago, it was of 1363.48 W/m^2).n energy pyramid is the graphical representation of the trophic levels (nutritional) by which the incoming solar energy is transferred into an ecosystem.
In the energy pyramid, the producers are on the bottom and the carnivores on top, and as you move up the pyramid, less energy is available. Energy Pyramid Review. 1. Energy pyramid - (trophic/ecological); quantifies the energy transfer from one organism to another in the food chain. 2. Energy begins at the sun and works its way through the plants, which give 10% of their energy stored to the carnivores who eat the plants. 3. As you go up the energy pyramid, each consumer obtains 10% of the previous consumer's energy, with the top predator only receiving 0.1% of the original solar energy. 4.