Biology study guide help please! I need much help!?

[ut.leslie]

1. Which of the following proteins do not pass through the endoplasmic reticulum?
a. Cell Membrane Proteins b. Secreted Proteins c. Lysosomal Proteins d. Ribosomal Proteins e. Golgi Proteins

2. The sequence Lys-Asp-Glu-Leu serves as a retention signal for ER proteins by binding to Lys-Asp-Glu-Leu receptors that:
a. Hold the proteins in the rough ER
b. Transport the proteins from the plasma membrane back to the ER
c. Hold the proteins in both smooth ER and rough ER
d. Hold the proteins in the smooth ER
e. Transport the proteins from the Golgi apparatus back to the ER

3. Lysosomal proteins are marked by adding a phosphate to a:
a. mannose group
b. serine group
c. glucose group
d. galactose group
e. fructose group