Amylase, also called ptyalin breakdown starch into simpler sugars & works at a pH of 6.7 If food reach in lime juice is taken the action of ptyalin on starch is reduced as lime juice creates acidic condition and enzymes ...

We know that, lactic acid is formed from glucose inside the muscle’s cells, during vigorous physical exercise. Because, there is lack of O₂ in the body. Remember, that – muscle cells respire an-aerobically to produce lactic acid.

Yeast, Mushroom, Bread mould, fungi having heterotrophic mode of nutrition. They breakdown the dead organic matter in to small particles out side their body then absorbed it.