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.
Lipids are digested by lipases. A lipase is an enzyme that catalyzes the breakdown of a lipid (triglyceride) molecule into one molecule of glycerol and three molecules of fatty acid.