Explain what is represented in the image (bio signaling)

The phosphorylation of RNA polymerase II carboxyl-terminal domain is catalyzed by the protein kinase which is         .   options:   TFIIA   TFIIB   TFIIF   TFIIH

Compare and contrast cell signaling in prokaryotes and eukaryotes

In 40 words or fewer, explain what an enzyme cascade is in the context of signal transduction pathways, and why these might be beneficial to the organism.

ATP and GTP play a few roles during transcription and translation. What are two roles that ATP plays and one role that GTP plays? GO S x2 x2 i T: B I

98. The correct sequence of cell signaling is

You design an enzyme assay and choose a substrate concentration equal to the Km of the enzymatic reaction. You measure the rate of the reaction at this substrate concentration to be 75.0 μmol/min. Calculate the Vmax of this reaction in μmol/min. Express your answer with one decimal place.  Your previous attempt suffered from low signal-to-noise ratio when you used a substrate concentration equal to the Km. So you decide to increase the substrate concentration to 0.45 mM. You remeasure the rate of the reaction at this new substrate concentration and find it to be 135.0 μmol/min. Using the same Vmax value found above, calculate the Km value of this enzymatic reaction. Express your answer in μM with one decimal place.  Considering the previous two questions, what would be the rate of the reaction at a substrate concentration of 0.01 mM? Express your answer in μmol/min with one decimal place.