Children get first mobile phone at average age of eight. Eight is the average age at which children are given their first mobile phone, according to a survey. Child on mobile phone: A survey found that children as young as seven were offering to do chores in exchange for cash to buy ringtones Photo: IAN JONES.
Enzymes such as amylases and proteases break down large molecules (starch or proteins, respectively) into smaller ones, so they can be absorbed by the intestines. Starch molecules, for example, are too large to be absorbed from the intestine, but enzymes hydrolyze the starch chains into smaller molecules such as maltose and eventually glucose, which can then be absorbed.
There is a common misconception that enzymes are destroyed by stomach acid. Nothing could be further from the truth. Stomach acid does not digest protein. Rather, it activates an enzyme called pepsinogen which then becomes pepsin that is secreted by the stomach wall.