General Knowledge - Biology - Discussion

Discussion Forum : Biology - Section 1 (Q.No. 18)
18.
Prokaryotic cells lack
nucleolus
nuclear membrane
membrane bound by organelles
All of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
23 comments Page 1 of 3.

Keerthana said:   6 years ago
Prokaryotes are organisms containing a prokaryotic cell. A prokaryotic cell does not have a true nucleus (well defined or well-organised nucleus). They also lack membrane-bound organelles, centrioles and nucleolus. The nuclear material is found without a cover, i.e the nuclear material remain uncovered, exposed or naked which indicates the absence of nuclear membrane so the nuclear material or nucleus lies free in the cytoplasm (part of the cell which is present in b/t the nucleus and the cytoplasm).

On the other hand eukaryotes are the organisms containing true nucleus along with the presence of membrane bound organelles, centrioles and nucleolus. Here, the nuclear material is not found without a cover, i.e, the nuclear material does not remain uncovered, exposed or naked which indicates the presence of nuclear membrane. So, the nuclear material or the nucleus is well bounded by a nuclear membrane.

Eg. For eukaryotes:-bacteria, blue-green algae.

Eg for prokaryotes:-multi-cellular organisms.

Tulisa said:   1 decade ago
There are two types of cells- Eukaryotic cells and Prokaryotic cells.
Eukaryotic cells are those which have a well developed nucleus.
Prokaryotic cells are those which don't have a well developed nucleus. Cells that lack a membrane-bound nucleus are called prokaryotes.

Monica said:   1 decade ago
Prokaryotic:primitive cells, do not have cell organelles, eukaryotic:animal cells have cell organelles like mitochondria also have nucleus and nucleolus.

Kelsy Alalibo said:   3 years ago
I think there is a sincere error in the options given. Option C says "membrane-bound by organelles" instead of "Organelles bound by membranes".
(1)

Nikitha said:   8 years ago
But when we search in google your getting to know prokaryotes have nucleoules and they are telling the reason about RNA so what the answer.

Sahasra said:   4 years ago
I think prokaryotic cells have nucleus but they lack the genetic material inside them and they are also known as the primitive cells.

Kishor kumar suryawanshi said:   1 decade ago
Prokaryotic cells are not contain the nucleous, nucleolus, and nuclear membrane. They are also not contain the some cell organelles.

Dhruvil said:   10 years ago
Prokaryote has nucleus surrounded by cell wall and contain various organelles but they lack nucleolus and cell membrane.

K.prasanthi said:   1 decade ago
Prokaryote is a unicellular organism having cells lacking membrane-bound nuclei. Prokaryotics are the primitive cells.

Ankit Sinha said:   1 decade ago
Prokaryotic cells are the most primitive type of cells and does not contain any nucleus or membrane bound organelle.


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