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Cell — The Unit of Life

30 NEET questions on Cell — The Unit of Life. A sample is shown below with full explanations; the rest are available free after signing up.

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Cell — The Unit of Life2026easy

Q1.Cell theory was formulated by ______________.

  • ASchleiden and SchwannAnswer
  • BRobert Brown
  • CSinger and Nicolson
  • DAntonie Von Leeuwenhoek

Explanation

Schleiden studied plants and Schwann animals, and together they concluded that all living things are made of cells. Robert Brown discovered the nucleus, Singer and Nicolson proposed the fluid mosaic model of the membrane, and Leeuwenhoek first observed live cells.

Source: NEET 2026 re-exam (21 June), Code 50, Q93

Cell — The Unit of Life2026medium

Q2.Which of the following are characteristics of prokaryotic cells? Choose the correct answer from the options given below:

  • (a) Ribosomes are made of 50S and 30S subunits
  • (b) They can have plasmids
  • (c) They contain mesosome
  • (d) They have peroxisomes.
  • A(b) and (c) only
  • B(a) and (c) only
  • C(a), (c) and (d) only
  • D(a), (b) and (c) onlyAnswer

Explanation

Prokaryotic ribosomes are 70S, built from 50S and 30S subunits; plasmids are extra-chromosomal DNA found only in prokaryotes; and the mesosome is an infolding of the prokaryotic plasma membrane. Peroxisomes are membrane-bound organelles, and prokaryotes have none — that is what rules out (d).

Source: NEET 2026 re-exam (21 June), Code 50, Q94

Cell — The Unit of Life2026easy

Q3.Mitochondrial inner membrane encloses ___________.

  • AmatrixAnswer
  • Bcytosol
  • Cmucus
  • Daqueous humor

Explanation

The inner membrane, thrown into cristae, encloses the mitochondrial matrix — the dense fluid holding the enzymes of the Krebs cycle, along with mitochondrial DNA and ribosomes. The cytosol lies outside the organelle entirely.

Source: NEET 2026 re-exam (21 June), Code 50, Q96

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Questions are reformatted from NEET previous year papers with original explanations and topic tagging. NEET Prep is not affiliated with the NEET examining body.