Big Markers

Question 1

Explain the process of producing extracellular proteins

Answer 1

1. mRNA made by transcription in the nucleus
2. mRNA leaves nucleus via the nuclear pores in the nuclear membrane/envelope
3. mRNA attaches to proteins on rough ER
4. Protein is synthesised in the ribosome (translation)
5. Transport vesicle leaves from the rough ER
6. Protein modified at golgi body
7. Golgi body packages protein into secretory vesicle
8. Vesicle moves along the microtubules
9. Secretory vesicle fuses with the cell surface membrane
10. Secretion occurs by exocytosis using ATP