Full question:
Several parts of an animal cell are involved in the processes of protein synthesis, packaging, and export. Which of the following correctly places the cell parts in the order in which they are involved?
- nucleus → vacuole → cell membrane
- mitochondria → vacuole → cell membrane
- ribosome → endoplasmic reticulum → Golgi complex → cell membrane
- lysosome → endoplasmic reticulum → Golgi complex → cell membrane
Answer:
ribosome → endoplasmic reticulum → Golgi complex → cell membrane
Explanation
First, the DNA is transcribed into mRNA in the nucleus. The mRNA then moves to the cytoplasm. Here, it encounters the ribosomes.
At the ribosomes. the mRNA is translated into protein. It gets folded in the endoplasmic reticulum and then is transferred to the Golgi complex.
At the Golgi complex, proteins are modified, packaged, and transported to their destination in a series of vesicles, which if it is outside the cell, is the cell membrane.