How organelles work together in cells 2.1.6

Question 1

What are the 9 steps of making and secreting a protein?

Answer 1

1. mRNA copy of the instructions for insulin is made in the nucleus.
2. mRNA leaves nucleus through nuclear pore
3. mRNA attaches to ribosome on RER
4. Ribosome reads instructions to assemble the protein (insulin)
5. Insulin molecules are pinched off in vesicles and travel and to Golgi apparatus
6. Golgi processes and packages insulin molecule
7. Insulin molecule pinched off in vesicles and travel towards plasma membrane
8. Vesicles fuse with plasma membrane
9. Plasma membrane opens to release insulin molecule