Question

exam lesson name: the cell and its processes
exam number: 700942rr
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question 15 of 20 :
select the best answer for the question.

1. all cells have some universal features. which of these is a universal feature found in every single cell on earth?

○ a. golgi apparatus
○ b. ribosomes
○ c. cell wall
○ d. mitochondria
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Explanation:

To solve this, we analyze each option:

• Option A: Golgi apparatus is present in eukaryotic cells (like plant and animal cells) but not in prokaryotic cells (like bacteria), so it's not universal.
• Option B: Ribosomes are responsible for protein synthesis. Both prokaryotic and eukaryotic cells have ribosomes (though prokaryotic ribosomes are smaller, 70S, and eukaryotic are 80S). So ribosomes are found in every cell.
• Option C: Cell wall is present in prokaryotes (bacteria, archaea) and some eukaryotes (plants, fungi), but animal cells (eukaryotic) lack a cell wall. So it's not universal.
• Option D: Mitochondria are organelles in eukaryotic cells that perform cellular respiration. Prokaryotic cells do not have mitochondria (they perform respiration in the cell membrane). So it's not universal.

Answer:

B. Ribosomes