#Question id: 31042
#Unit 4. Cell Communication and Cell Signaling
#Question id: 562
#Unit 1. Molecules and their Interaction Relevant to Biology
Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at the active site; this enzyme-inhibitor bond is not cleaved by the enzyme. This is an example of what kind of inhibition?
#Question id: 5004
#Unit 11. Evolution and Behavior
Pax-6 usually causes the production of a type of light-receptor pigments. In vertebrate eyes, though, a different gene (the rh gene family) is responsible for the light-receptor pigments of the retina. The rh gene, like Pax-6, is ancient. In the marine ragworm, for example, the rh gene causes production of c-opsin, which helps regulate the wormʹs biological clock. Which of these most likely accounts for vertebrate vision?
#Question id: 4208
#Unit 3. Fundamental Processes
Tryptophan synthesis is controlled by a repressor protein which is activated by a corepressor which is
#Question id: 633
#Unit 1. Molecules and their Interaction Relevant to Biology
An amino acid transporter protein is responsible for the transport of a specific amino acid across a membrane. The KI values of several competitive inhibitors of the amino acid transporter are shown above. Based on these data, which of the following is most likely the amino acid transported by this protein?