The smallest known cell per NCERT is
AMycoplasma at about 0.3 μm
BE. coli at about 3 μm
Ca red blood cell at 7 μm
Da virus at about 0.1 μm
Answer & Solution
Correct answer: A. Mycoplasma at about 0.3 μm
Mycoplasma at 0.3 μm is the smallest known cell. Viruses are smaller but are NOT cells (cannot reproduce alone, lack cellular machinery), so they fall outside cell theory entirely. E. coli is several μm; RBCs are bigger still.
Related questions
Cilia and flagella exhibit the characteristic '9 + 2' arrangement of:Eukaryotic ribosomes are typically:Chromoplasts in plants are responsible for:Lysosomes are sometimes called the 'SUICIDE BAGS' of the cell because they:The Rough Endoplasmic Reticulum (RER) has its ribosomes attached to perform:Mitochondria are called the 'POWERHOUSE OF THE CELL' because they:A structure UNIQUE to plant cells (NOT found in animal cells) is the:Prokaryotic cells DIFFER from eukaryotic cells in that prokaryotes: