The pigments of chlorophyll a,b, and carotenoids are present in:
Correct answer: C. Thylakoid membrane
- A. Stroma
- B. Grana
- C. Thylakoid membrane
- D. Crista
Explanation
The correct answer is the thylakoid membrane. This is where the pigments chlorophyll a, b, and carotenoids are located, as they are crucial for capturing light energy and facilitating the light-dependent reactions of photosynthesis. The other options are incorrect because the stroma is where the Calvin cycle occurs, not where the pigments are located; grana are stacks of thylakoids, and while they house the thylakoid membranes, the pigments are specifically in the membranes themselves; and cristae are part of mitochondria, not chloroplasts, and play a role in cellular respiration, not photosynthesis.
This question appeared on the ETEA MDCAT 2013 paper, which you can sit online with every answer explained.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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