Question

which structures are found in all prokaryotic cells?
a flattened, stack - like structures which process macromolecules
b a continuous, interconnected network of membranes
c small, protein - producing units composed of rna and protein
d power - producing organelles that convert energy into usable forms

Explanation:

• Option A: Flattened, stack - like structures (Golgi apparatus) are not present in prokaryotic cells. Prokaryotes lack membrane - bound organelles.
• Option B: A continuous, interconnected network of membranes (endoplasmic reticulum) is a membrane - bound organelle. Prokaryotes do not have such organelles.
• Option C: Ribosomes (small, protein - producing units composed of RNA and protein) are found in all prokaryotic cells. They are responsible for protein synthesis.
• Option D: Power - producing organelles (mitochondria) are membrane - bound. Prokaryotes lack membrane - bound organelles.

Answer:

C. Small, protein - producing units composed of RNA and protein