volume_mute
Fill in the blanks about the internal structure of a chloroplast.
publish date: 2026/06/15 18:20:23.847234 UTC
Complete the following description of chloroplast internal structure:
Inside the chloroplast, stacks of disc-like sacs called (1) are embedded in a protein-rich fluid called the (2). The membranes within the stacks are called (3), while the membranes connecting different stacks are called (4).
Please drag and drop the selected option in the right place or type it instead
stroma
grana lamellae
grana
stroma lamellae
Correct Answer
(1) grana
(2) stroma
(3) grana lamellae
(4) stroma lamellae
Explanation
Summary of chloroplast internal structure:
| Structure | Role |
|---|---|
| Grana | Stacks of thylakoid discs; site of light reactions |
| Stroma | Protein-rich matrix; site of Calvin cycle |
| Grana lamellae | Membranes forming the discs within each granum |
| Stroma lamellae | Membranes interconnecting separate grana stacks |
Reference
Biology: A Self-Teaching Guide