Cell Structure MCQs for NEET — Zoology Questions with Answers

The NCERT text specifies: 'Most prokaryotic cells, particularly the bacterial cells, have a chemically complex cell envelope. The cell envelope consists of a tightly bound three layered structure i.e., the outermost glycocalyx followed by the cell wall and then the plasma membrane.' This indicates the cell wall is outside the plasma membrane, but beneath the glycocalyx if present.

The text mentions: 'All prokaryotes have a cell wall surrounding the cell membrane except in mycoplasma.'

The NCERT text states: 'The cell envelope consists of a tightly bound three layered structure i.e., the outermost glycocalyx followed by the cell wall and then the plasma membrane.'

The text says: 'The cell wall of a young plant cell, the primary wall is capable of growth, which gradually diminishes as the cell matures and the secondary wall is formed on the inner (towards membrane) side of the cell.'

The NCERT text explains: 'Bacteria can be classified into two groups on the basis of the differences in the cell envelopes and the manner in which they respond to the staining procedure developed by Gram viz., those that take up the gram stain are Gram positive and the others that do not are called Gram negative bacteria.'

The NCERT text states: 'The cell envelope consists of a tightly bound three layered structure i.e., the outermost glycocalyx followed by the cell wall and then the plasma membrane.' Therefore, the correct order is Glycocalyx, Cell wall, Plasma membrane.

The NCERT states: 'Bacteria can be classified into two groups on the basis of the differences in the cell envelopes and the manner in which they respond to the staining procedure developed by Gram viz., those that take up the gram stain are Gram positive and the others that do not are called Gram negative bacteria.' The cell wall's composition significantly impacts Gram staining.

According to the provided text: 'Glycocalyx differs in composition and thickness among different bacteria. It could be a loose sheath called the slime layer in some, while in others it may be thick and tough, called the capsule.'.

The text explicitly states: 'Although each layer of the envelope performs distinct function, they act together as a single protective unit.'

The NCERT text states: 'prokaryotes have a cell wall surrounding the cell membrane except in mycoplasma.' This indicates that mycoplasma is a prokaryote without a cell wall.