A protein is synthesized in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membrane layers it has to pass to reach its destination?
2
3
4
5
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CDS-1 – 2018
1. Crossing the ER membrane to exit the lumen into the cytoplasm (1 layer).
2. Crossing the outer chloroplast membrane (1 layer).
3. Crossing the inner chloroplast membrane (1 layer).
4. Crossing the thylakoid membrane to enter the inner thylakoid space (1 layer).
Total membrane layers crossed = 1 + 1 + 1 + 1 = 4.