Cell: The Unit of Life: NEET questions with solutions

This chapter is a high-yield NEET source, testing precise recall of organelle structure and function — plasma membrane, endomembrane system, mitochondria, plastids, ribosomes, cytoskeleton, and the nucleus. Marks are commonly lost by confusing structurally similar organelles (lysosome vs vacuole, cilia vs centriole) or mixing up prokaryotic and eukaryotic features.

1. 1.The cell theory, as it stands today, states that all living organisms are composed of cells and cell products, and that new cells arise only…Cell TheoryEasySingle correct
2. 2.A prokaryotic ribosome sediments as a 70S particle made of a 50S and a 30S subunit. Free ribosomes lying in the cytoplasm of a eukaryotic…RibosomesEasySingle correct
3. 3.The fluid mosaic model of the plasma membrane, proposed by Singer and Nicolson in 1972, describes how membrane lipids and proteins are…Plasma membraneMediumSingle correct
4. 4.The Golgi apparatus is an important part of the endomembrane system that packages materials received from the endoplasmic reticulum.…Endomembrane system — Golgi apparatusMediumStatement based
5. 5.Mitochondria are unusual among cytoplasmic organelles in carrying a genome of their own, in addition to their distinctive double-membrane…MitochondriaMediumStatement based
6. 6.Lysosomes, popularly nicknamed the 'suicide bags' of the cell because of the powerful digestive enzymes they hold, belong to the…Endomembrane system — LysosomesMediumSingle correct
7. 7.Mitochondria and chloroplasts are unlike most other organelles in retaining a trace of genetic independence from the nucleus. Evaluate the…Mitochondria and plastidsHardAssertion–Reason
8. 8.In a mature plant cell that has formed a secondary wall, the wall region between the cell and its neighbour shows three distinct layers.…Cell wallMediumSingle correct
9. 9.A transverse section through the shaft of a cilium or flagellum, viewed under the electron microscope, shows a characteristic microtubule…Cilia and flagellaHardSingle correct
10. 10.Robert Brown first described the nucleus as a cell organelle in 1831. Inside the nucleoplasm, one or more dense, spherical structures are…NucleusEasySingle correct