Amylase is an enzyme that breaks down starch. why can't the same enzyme break down cellulose? (etext carbohydrates serve as fuel and building material)

Answer is: The monosaccharide monomers in cellulose are bonded together differently than in starch.
The glucose monomers (C₆H₁₂O₆) in cellulose are bonded in a beta glycosidic linkage (β-1,4 bond), whereas those in starch have an alpha glycosidic linkage (α-1,4 bond). The enzyme amylase is specific for the alpha glycosidic linkage.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.