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Trypsin is a serine protease with an identical mechanism to chymotrypsin, but cuts after positively-charged amino acids. Which of the following statements would you expect to be false? a. Serine 195 will be conserved. b. The oxyanion hole will be present. c. The active site will include an Asp or […]

Movement of chloride ions across the cell membrane from the the outside of nerve cells to the inside has a delta-G of about 1.1 kcal/mol even in the presence of a gradient. Why is the gradient alone not enough to get the ions into the cell? (Think about how delta-G […]

Suppose that you discover a new life form on Mars. These organisms have DNA containing the same four nucleotides as Earth DNA. They also make proteins using a triplet code, so they use the same 64 codons that Earth organisms do. Martian proteins are also similar to Earth proteins, but […]

In an experiment you, the researcher, remove ATP from the system. What would be a likely consequence of the lack of ATP on muscle contraction? The tropomyosin filament would not be dislodged preventing contraction.The cross bridges would remain linked and therefore contraction would stopThe cross bridges would break apart due […]