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The diagram below shows the structure of a chloroplast. |
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a. |
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Name the process that occurs in chloroplasts |
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Photosynthesis |
(1) |
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b |
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Name the structures labeled. |
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(i) |
X. |
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Grana/granum |
(1) |
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(ii) |
Y |
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Stroma |
(1) |
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c |
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Give two similarities in structure between chloroplasts
and mitochondria. |
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- double membrane/envelope
membrane;
- possess DNA circlets;
- possess ribosomes;
- contain electron
carriers;
- large internal surface
area.
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(any 2) |
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d |
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Some scientists think that chloroplasts and mitochondria
have evolved from intracellular symbiotic bacteria. Explain |
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why the structures of mitochondria and chloroplasts
can account for this hypothesis. |
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- contain 70s ribosomes
like bacteria/prokaryotes
- contain DNA/contains
genetic information codes for proteins;
- organelles can manufacture
own proteins
- organelles can reproduce
independently
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(any 2) |