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Q. Which of the following bacteria is observed as chain-like formation?

WBJEEWBJEE 2014Biological Classification

Solution:

The coccus bacteria (plural - cocci) are spherical, ellipsoidal or ovoid in shape. Coccus forms may exist singly (Micrococcus), in tetrads (Tetracoccus), in chains (Streptococcus) or in irregular grape-like clusters (Staphylococcus). A few cocci may occur in cubical packets of 8 or more cells (Sarcina).