NEET BIOLOGY

BIOLOGICAL CLASSIFICATION

KINGDOM MONERA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Prokaryotic cells are
A
cells lack organized nucleus and membrane-bound organelles
B
Cells that have a nucleus with cell wall and membrane
C
Cells that are free of ribosomes and DNA
D
Cells that do not have a membrane or flagellum
Explanation: 

Detailed explanation-1: -Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles differentiates prokaryotes from another class of organisms called eukaryotes.

Detailed explanation-2: -Prokaryotic cells, such as bacteria, have a free-floating chromosome that is usually circular and is not enclosed in a nuclear membrane. Instead, the DNA simply exists in a region of the cell called the nucleoid. Prokaryotic cells only have a small range of organelles, generally only a plasma membrane and ribosomes.

Detailed explanation-3: -The nucleus is only one of many membrane-bound organelles in eukaryotes. Prokaryotes, on the other hand, have no membrane-bound organelles.

Detailed explanation-4: -Prokaryotic cells are those that lack a membrane-bound nucleus and membrane-bound organelles. All bacteria and archaebacteria are prokaryotes. Eukaryotic cells are those that contain a membrane-bound nucleus and membrane-bound organelles. All plants, animals, fungi, and protists are eukaryotes.

Detailed explanation-5: -Prokaryotes lack an organized nucleus and other membrane-bound organelles. Prokaryotic DNA is found in a central part of the cell called the nucleoid. The cell wall of a prokaryote acts as an extra layer of protection, helps maintain cell shape, and prevents dehydration.

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