NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL ORGANELLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
This porous structure surrounds the nucleus, keeping it intact
A
Lysosomes
B
Nuclear membrane
C
Golgi body
D
Centriole
Explanation: 

Detailed explanation-1: -The nuclear envelope (NE) is a highly regulated membrane barrier that separates the nucleus from the cytoplasm in eukaryotic cells.

Detailed explanation-2: -The Nuclear Envelope-The nuclear envelope is a double-layered membrane that encloses the contents of the nucleus during most of the cell’s lifecycle.

Detailed explanation-3: -In eukaryotic cells, the membrane that surrounds the nucleus-commonly called the nuclear envelope-partitions this DNA from the cell’s protein synthesis machinery, which is located in the cytoplasm.

Detailed explanation-4: -The nuclear membrane is comprised of two phospholipid bilayers. The membrane facing the cytoplasm is termed the outer nuclear membrane (ONM), and the membrane facing the nucleoplasm is termed the INM. The ONM continuously connects to the ER, and its surface, like that of the ER, is decorated with ribosomes.

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