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Which best distinguishes prokaryotic and eukaryotic cells?

a) Presence of a nucleus
b) Lack of cell membrane
c) Similar size
d) Absence of ribosomes

User Stichoza
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1 Answer

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Final answer:

Prokaryotic cells and eukaryotic cells are distinguished by the presence of a nucleus; eukaryotic cells have a nucleus and membrane-bound organelles, whereas prokaryotic cells do not.

Step-by-step explanation:

The characteristic that best distinguishes prokaryotic cells from eukaryotic cells is the presence of a nucleus. Prokaryotic cells lack a nucleus and membrane-bound structures, whereas eukaryotic cells have a true nucleus, in which their DNA is surrounded by a nuclear membrane. Additionally, eukaryotic cells contain other membrane-bound organelles that compartmentalize various cellular functions, allowing for greater complexity and specialization.

All cells, whether prokaryotic or eukaryotic, share four common structures: a plasma membrane that serves as a barrier between the cell's interior and the external environment, the cytoplasm which is a jelly-like substance containing other cellular components, DNA that is the genetic material of the cell, and ribosomes which are responsible for protein synthesis.

User Danjah
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