_____ in the cell regulates the entry and exit of various compounds, nutrients and wastes.

Cell membrane

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Endoplasmic reticulum

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Nuclear membrane

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Nucleus

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Solution

The correct option is A
Cell membrane

The cell membrane protects and regulates the entry and exit of molecules. Cell membrane can be compared to a big plastic bag with minute holes. The bag holds all of the cell pieces and fluids inside the cell and keeps all unnecessary things out of the cell. Pores allow only selected things to move in and out of the cell.

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Similar questions

Statement 1: Nuclear membrane and the endoplasmic reticulum were originally formed from the invaginations of the cell membrane.
Statement 2: Mitochondria and chloroplast are the results of a symbiotic association of bacteria with primitive pre-eukaryotic cells.

Write the main function of:

Q. Compare the cell to a factory. There are various areas in the factory. Now place the organelles listed below against corresponding factory areas.

ribosomes, lysosomes, mitochondria, cell membrane, Golgi bodies, nucleus, nuclear membrane, endoplasmic reticulum, cytoplasm
AREAS IN A FACTORY
(a) main office_______________.
(b) office wall _______________.
(c) area surrounding main office _____________.
(d) production units _______________.
(e) supply channels ________________.
(f) recycling units _________________.
(g) power house __________________.
(h) boundary wall of factory ______________.
(i) packaging unit ________________.

Q. How many of the cell organelles have no membrane in a eukaryotic plant cell? Ribosome, Chloroplast, Mitochondria, Endoplasmic Reticulum, Golgi bodies.

Question 12
The proteins and lipids, essential for building the cell membrane, are manufactured by

(a) Rough endoplasmic reticulum
(b) Golgi apparatus
(c) Plasma membrane
(d) Mitochondria

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