A researcher wants to know the effect of magnesium ions on the function of cell organelles. He/ She grows some eukaryotic cells in a medium which lacks magnesium ions.Which of the following functions will be interrupted in these cells?
Correct answer: A. Assembling of ribosomal subunits during protein synthesis
- A. Assembling of ribosomal subunits during protein synthesis
- B. Secretion of hydrolytic enzymes by lysosomes
- C. Production of ATP by mitochondria
- D. Coiling of DNA during cell division
Explanation
The correct answer is Option A:Assembling of ribosomal subunits during protein synthesis.Magnesium ions play a critical role in stabilizing the structure of ribosomes and facilitating the assembly and function of ribosomal subunits necessary for protein synthesis. In the absence of magnesium, this process is interrupted. Option B is incorrect because lysosomal enzyme secretion is not directly dependent on magnesium ions. Option C is incorrect, as ATP production is primarily reliant on other factors such as the proton gradient and substrates like ADP. Option D is incorrect because DNA coiling is managed by histones and other proteins, not magnesium ions.
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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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