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B
Proteins
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C
Peptidoglycan
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D
Protein and fats
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Solution
The correct option is C Peptidoglycan The cell wall of the prokaryotes, is composed of peptidoglycan, a single large polymer of amino acids and sugar. This rigid structure of peptidoglycan, specific only to prokaryotes, gives the cell shape and surrounds the cytoplasmic membrane. Peptidoglycan is a huge polymer of disaccharides (glycan), cross-linked by short chains of identical amino acids (peptides) monomers.