Plasma membrane — task. Biology CBSE Live product, Class 9 (2025-26).

Choose the best answer:

1. Which of the following is true about diffusion?

It occurs from a region of lower concentration to higher concentration
It is essential for exchange of gases in the respiratory system
It always requires ATP
It takes place only in plants

2. Which of the following is not a function of the plasma membrane?

Regulating the movement of molecules across the membrane
Engulfing food materials by endocytosis
Communicating with the external environment
Synthesizing proteins for the cell

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