Question

Eukaryotic cells differ from prokaryotic cells in having
A. Single envelope system
B. Nucleoid
C. 70s ribosome
D. Nucleus

Answer 1

Hint: Prokaryotic organisms are also called the primitive organisms. They are single celled like bacteria and archaea. The Eukaryotes are the advanced organisms which are multicellular like fungi.

Complete Answer:
The prokaryotic cells and eukaryotic cell differ widely in the number of way like-
1. Envelope system- the prokaryotic cell is made up of a single outer envelope called the cell membrane. All the other membrane bound organelles are absent in prokaryotic cells but the eukaryotic cells have the membrane bound organelles.
2. Nucleoid- It is a nucleus like structure present in the cytoplasm of a prokaryotic cell which is not surrounded by any membrane which is absent in the Eukaryotic cell.
3. Nucleus- Eukaryotic cell has a definite nucleus and nucleolus which is surrounded by a nuclear membrane.
4. Ribosome- The 70s ribosomes are present in the prokaryotic cell but the eukaryotic cells have 80s ribosomes.

The correct answer is (D). Eukaryotic cells differ from prokaryotic cells in having nucleus.

Additional Information: In the eukaryotic cells, the DNA is present in the nucleus surrounded by nuclear membrane whereas in prokaryotes, it is naked, circular and is present in free floating state.

Note: Human cells are Eukaryotic in nature. All the animal cells, plant cells, are Eukaryotic. Protists are single celled eukaryotes. The internal compartmentalisation makes eukaryotic cells more complex and efficient than prokaryotic cells.