A cell wall is a tough and flexible layer surrounding the cell membrane in plants, algae, and most prokaryotes.
impermeability
A cell wall is a tough and flexible layer surrounding the cell membrane in plants, algae, and most prokaryotes. The cell wall shows complete permeability as it helps to transport substances in and out of the cell.
So, the correct answer is A) 'Complete permeability'.
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
In an oscillating spring mass system, a spring is connected to a box filled with sand. As the box oscillates, sand leaks slowly out of the box vertically so that the average frequency ω(t) and average amplitude A(t) of the system change with time t. Which one of the following options schematically depicts these changes correctly? 
| List I | List II |
|---|---|
| A. Adenosine | III. Nucleoside |
| B. Adenylic acid | II. Nucleotide |
| C. Adenine | I. Nitrogen base |
| D. Alanine | IV. Amino acid |
Read More: Fundamental Unit of Life: Cell
The different parts of a cell and their functions are as follows:
