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Questions and Answers
What is the primary function of the thylakoids within a chloroplast?
What is the primary function of the thylakoids within a chloroplast?
- To transport water molecules within the plant
- To synthesize glucose
- To store genetic material
- To conduct photosynthesis by facilitating the capture of light energy (correct)
What do the grana consist of in the chloroplast?
What do the grana consist of in the chloroplast?
- The outer membrane of the chloroplast
- Chlorophyll molecules only
- Individual thylakoids arranged in stacks (correct)
- The stroma surrounding the chloroplast
Which component of the chloroplast contains the thylakoid lumen?
Which component of the chloroplast contains the thylakoid lumen?
- The outer membrane
- The stroma
- The thylakoid sacs (correct)
- The chlorophyll
How many chloroplasts can typically be found in a single mesophyll cell?
How many chloroplasts can typically be found in a single mesophyll cell?
What structure surrounds the central aqueous space of the chloroplast?
What structure surrounds the central aqueous space of the chloroplast?
Flashcards
Thylakoid Lumen
Thylakoid Lumen
The innermost space inside a thylakoid, filled with fluid.
Grana
Grana
Stacks of flattened thylakoid sacs within chloroplasts.
Stroma
Stroma
A dense fluid that fills the space between the thylakoid membranes and the inner chloroplast membrane.
Thylakoid Membranes
Thylakoid Membranes
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Chloroplast
Chloroplast
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Study Notes
Plant Cell Structure - Chloroplasts
- A mesophyll cell has 30-40 chloroplasts, 2-4 by 4-7 microns.Each chloroplast is enclosed by two membranes surrounding a central aqueous space.
- Inside this space, called the stroma, there are membranous sacs known as thylakoids.
- Thylakoids have an internal aqueous space, also known as the thylakoid lumen or thylakoid space.
- Thylakoids can be stacked into columns called grana.
Chloroplast Structure
- Chloroplasts have a double membrane structure.
- The stroma is the central aqueous space within a chloroplast.
- Thylakoid sacs are membranous sacs within the chloroplast stroma.
- Grana are stacks of thylakoid sacs.
Chlorophyll and Electron Transport Chain (ETC)
- The chlorophyll and electron transport chain (ETC) are located within the thylakoid membrane.
- An H+ gradient is generated within the thylakoid sac.
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