Which of the following cellular parts is correctly described?
Correct answer: A. Thylakoids - flattened membranous sacs forming the grana of chloroplasts
- A. Thylakoids - flattened membranous sacs forming the grana of chloroplasts
- B. Centrioles - sites for active RNA synthesis
- C. Ribosomes - those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S)
- D. Lysosomes - optimally active at a pH of about 8.5
Explanation
Thylakoids are flattened membranous sacs forming the grana of chloroplasts. These are essential components of chloroplasts, playing a critical role in photosynthesis by housing pigments necessary for capturing light energy.
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About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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