. Which statement about the role of luminal pH of Golgi compartments is correct?

. Which statement about the role of luminal pH of Golgi compartments is correct?

  1. Because the Golgi becomes progressively more acid, and is more acid than the ER, ER resident proteins bind to retrieval receptors with high affinity in the Golgi.
  2. Because the Golgi becomes progressively more alkaline, and is more alkaline than the ER, ER resident proteins bind to retrieval receptors with low affinity in the Golgi.
  3. Because the Golgi becomes progressively more acid, and is more acid than the ER, ER resident proteins bind to retrieval receptors with low affinity in the Golgi.
  4. Because the Golgi becomes progressively more acid, and is more acid than the ER, ER resident proteins bind to retrieval receptors with low affinity in the ER, causing them to be released.
  5. a and d are correct.