Question

51. Which of the following is NOT true of secreted proteins?

A. They are synthesized using ribosomes
B. They enter the ER lumen during translation
C. They contain a signal that directs them into the lysosome
D. They are transported between organelles in membrane-bound vesicles

Answer 1

The correct answer is C. They contain a signal that directs them into the lysosome.

Step-by-step explanation:

The correct answer is C. They contain a signal that directs them into the lysosome.

Secreted proteins are synthesized using ribosomes and enter the endoplasmic reticulum (ER) lumen during translation. They are then transported between organelles in membrane-bound vesicles. However, they do not contain a signal that directs them into the lysosome. Proteins that are destined for lysosomes contain a specific signal sequence that directs them to the lysosome for degradation.