Chloroplasts have a double envelope, grana (stacks of thylakoids for light absorption), stroma (where sugar synthesis occurs with enzymes), and DNA and ribosomes to manufacture proteins, enabling photosynthesis.
Os cloroplastos contêm um envelope duplo, grana (pilhas de tilacóides para absorção de luz), estroma (onde a síntese de açúcares ocorre com enzimas), DNA e ribossomas para fabricar proteínas, permitindo a fotossíntese.
| Front | What is the function of the chloroplast |
|---|---|
| Back | Chloroplast envelope- double plasma membrane, highly selective of which materials can enter the chloroplast Grana- stacks of up to 100 discs like structure called thylakoids. Inside thylakoids are pigments called chlorophyll. Some thylakoids join up. Grana is where the first stage of photosynthesis occurs (light absorption). They have a large surface area for chlorophyll, electron carries and enzymes. Stroma- fluid filled matrix where second stage of photosynthesis occurs (synthesis of sugars). Fluid of stroma contains all the enzymes needed to carry out the second stage of photosynthesis Chloroplast contain DNA and ribosomes so they can quickly manufacture Proteins required for photosynthesis. Intergranal lamella joins grana together |
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