Question

Choose the difference between prokaryotes and eukaryotes?

• A. Prokaryotes have RNA, eukaryotes have DNA.
• B. Prokaryotes have a nucleoid, eukaryotes have a nucleus.
• C. Prokaryotes have DNA, eukaryotes have RNA.
• D. Prokaryotes have a nucleus, eukaryotes have a nucleoid.

Answer 1

The correct option is B Prokaryotes have a nucleoid, eukaryotes have a nucleus.

Prokaryotic cells are primitive cells. They do not possess many membrane bound organelles as mitochondria, lysosomes etc. They also do not have well defined membrane bound nucleus. Nuclear material of a prokaryotic cell consists of a single chromosome which is in direct contact with cytoplasm. Here, the undefined nuclear region in the cytoplasm is called as nucleoid, i.e., there is no nuclear membrane.

Eukaryotes possess well defined nucleus and membrane bound organelles as mitochondria, Golgi complex, etc. Nucleus is bound with double membrane in eukaryotic cell in which most of the genetic material is present.

Hence the correct option is B.