Question

1. which organelle is found in both prokaryotes and eukaryotes?

vacuoles
mitochondria
nucleus
ribosomes

Explanation:

• Vacuoles: Mainly found in eukaryotic plant cells (large central vacuole) and some single - celled eukaryotes. Prokaryotes generally do not have vacuoles in the same sense.
• Mitochondria: These are double - membrane - bound organelles. Prokaryotes lack membrane - bound organelles, so mitochondria are exclusive to eukaryotes.
• Nucleus: Prokaryotes have a nucleoid (a region with DNA) but no true nucleus (enclosed by a nuclear membrane). The nucleus is a characteristic of eukaryotes.
• Ribosomes: Both prokaryotes and eukaryotes need to synthesize proteins. Ribosomes are the sites of protein synthesis. Prokaryotes have 70S ribosomes (composed of 50S and 30S subunits), and eukaryotes have 80S ribosomes (composed of 60S and 40S subunits), but they are present in both.

Answer:

ribosomes