During curdling of milk, what happens to sugar present in it? 

<p>This is a Short Answer Type Questions as classified in NCERT Exemplar</p><p>During the curdling process, the lactose sugar in milk is converted to lactic acid.</p><p>Milk curdling is caused by lactic acid-producing bacteria found in milk. Protein denaturation is an example. When a protein is exposed to physical or chemical alterations, it is said to be modified. The hydrogen bond has been shattered. Globules open up, helices uncoil, and proteins lose their biological function.</p><p>&nbsp;</p>

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