E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?

#Question id: 401

#Section 4: Fundamentals of Biological Engineering

.Which of the following graphs describes the relationship between [H3O+] and pH?

#Question id: 402

#Section 2: General Biology

If the DG'° of the reaction A -> B is –40 kJ/mol, under standard conditions the reaction:

#Question id: 402

#Section 4: Fundamentals of Biological Engineering

If the DG'° of the reaction A -> B is –40 kJ/mol, under standard conditions the reaction:

#Question id: 403

#Section 2: General Biology

For the reaction A -> B, DG'° = –60 kJ/mol.  The reaction is started with 10 mmol of A; no B is initially present.  After 24 hours, analysis reveals the presence of 2 mmol of B, 8 mmol of A. Which is the most likely explanation?

#Question id: 403

#Section 4: Fundamentals of Biological Engineering

For the reaction A -> B, DG'° = –60 kJ/mol.  The reaction is started with 10 mmol of A; no B is initially present.  After 24 hours, analysis reveals the presence of 2 mmol of B, 8 mmol of A. Which is the most likely explanation?

#Question id: 404

#Section 4: Fundamentals of Biological Engineering

When a mixture of 3-phosphoglycerate and 2-phosphoglycerate is incubated at 25 °C with phosphoglycerate mutase until equilibrium is reached, the final mixture contains six times as much 2-phosphoglycerate as 3-phosphoglycerate.  Which one of the following statements is most nearly correct, when applied to the reaction as written?  (R = 8.315 J/mol·K; T = 298 K)  3-Phosphoglycerate -> 2-phosphoglycerate