Question

multiple choice question
according to recent studies, where are psii and the b6 - f complexes located?
in the stroma
in the stroma lamellae and on portions of the thylakoid membrane that surround the chloroplast (together with the outer membrane)
in the grana and in borders between the grana and the stroma lamellae

Explanation:

Photosystem II (PSII) and the $b_6 - f$ complexes are key components in the light - dependent reactions of photosynthesis. They are located in the grana and in borders between the grana and the stroma lamellae. This location is important for their role in capturing light energy and facilitating electron transport.

Answer:

In the grana and in borders between the grana and the stroma lamellae