Question

1. a group of thylakoid discs makes up: a. the stroma b. a granum c. a chloroplast d. a vacuole e. the mesophyll layer

Explanation:

In plant - cell structure, a stack of thylakoid discs is called a granum. Thylakoids are the sites of the light - dependent reactions of photosynthesis, and they are organized into these stacks within the chloroplast. The stroma is the fluid surrounding the thylakoids, a chloroplast is the organelle containing thylakoids and grana, a vacuole is a different type of organelle for storage, and the mesophyll layer is a tissue in plant leaves.

Answer:

B. a granum