Which sequence correctly traces the path of a protein in the cell?
a. rough endoplasmic reticulum, golgi apparatus, released from the cell
b. ribosome, smooth endoplasmic reticulum, chloroplast
c. smooth endoplasmic reticulum, lysosome, golgi apparatus incorrect
d. mitochondria, rough endoplasmic reticulum, cell membrane

Option a is the correct answer.

Explanation: Rough cytoplasmic reticulum is a membrane bound organelle to which ribosomes are attached. The ribosomes on the surface of the rough endoplasmic reticulum are organelles where protein synthesis takes place in a process called translation. The rough endoplasmic reticulum then transports the newly synthesized proteins to the golgi apparatus where they undergo posttranslational modification and packaged into vesicles. After modification and packaging, the newly synthesized proteins are then released from the cell and transported to where they are needed.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms