P bodies regulate which cellular process in the cytoplasm?

P bodies regulate which cellular process in the cytoplasm?

• A. Degrade proteins in lysosomes
• B. Regulate mRNA translation in the cytoplasm
• C. Synthesize rRNA in mitochondria
• D. Replicate DNA during mitosis

Answer: (B)

P bodies are cytoplasmic granules that house factors involved in mRNA turnover and translational control. They concentrate enzymes for mRNA decay and proteins that repress translation, effectively storing untranslated mRNAs and tagging some for decay. This means they help determine which mRNAs are being translated at any given time by keeping certain transcripts in a repressed state in the cytoplasm, ready to be reactivated or degraded as needed. The other options refer to processes outside this role: degrading proteins in lysosomes happens in lysosomes, rRNA synthesis in mitochondria occurs in mitochondrial/nuclear contexts, and DNA replication during mitosis occurs in the nucleus. So, P bodies mainly regulate mRNA translation in the cytoplasm.

P bodies are cytoplasmic granules that house factors involved in mRNA turnover and translational control. They concentrate enzymes for mRNA decay and proteins that repress translation, effectively storing untranslated mRNAs and tagging some for decay. This means they help determine which mRNAs are being translated at any given time by keeping certain transcripts in a repressed state in the cytoplasm, ready to be reactivated or degraded as needed. The other options refer to processes outside this role: degrading proteins in lysosomes happens in lysosomes, rRNA synthesis in mitochondria occurs in mitochondrial/nuclear contexts, and DNA replication during mitosis occurs in the nucleus. So, P bodies mainly regulate mRNA translation in the cytoplasm.