volume_mute
Match each internal chloroplast structure to its correct description.
publish date: 2026/06/15 18:20:21.896963 UTC
volume_muteChloroplasts have a complex internal membrane system. Match each structure to its correct description.
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Structure
Grana
Grana lamellae
Stroma lamellae
Stroma
Description
Stacks of disc-like membranous sacs (thylakoids)
Membranes connecting different grana stacks
Proteinaceous matrix surrounding the internal membranes
Membranes within the grana stacks
Correct Answer
(1) Stroma,Proteinaceous matrix surrounding the internal membranes
(2) Grana,Stacks of disc-like membranous sacs (thylakoids)
(3) Grana lamellae,Membranes within the grana stacks
(4) Stroma lamellae,Membranes connecting different grana stacks
Explanation
The internal structure of a chloroplast:
- Stroma — the protein-rich fluid matrix that fills the chloroplast; site of carbon fixation reactions
- Grana (singular: granum) — stacks of membrane-enclosed disc-like sacs where light reactions occur
- Grana lamellae — the membranes forming the discs within each granum
- Stroma lamellae — membranes that interconnect the separate grana stacks
Reference
Biology: A Self-Teaching Guide