Question

storage
polysaccharides (3/4)
glycogen
amylopectin
starch
glyceraldehyde
structural
polysaccharides (4/4)
chitin
cellulose

Explanation:

Step1: Identify storage polysaccharides

Storage polysaccharides are used for energy storage. Glycogen (animal storage), amylopectin (part of starch, plant storage), and starch (plant storage) are storage polysaccharides. Glyceraldehyde is a monosaccharide, not a polysaccharide, so it does not belong in storage polysaccharides.

Step2: Identify structural polysaccharides

Structural polysaccharides provide support. Chitin (in fungi/exoskeletons) and cellulose (plant cell walls) are structural. The structural polysaccharides box has 4/4, so we check the storage box: we need to remove glyceraldehyde from storage.

Answer:

In the "storage polysaccharides" category, the incorrect item is glyceraldehyde (it is a monosaccharide, not a polysaccharide). So the correct storage polysaccharides are glycogen, amylopectin, and starch (remove glyceraldehyde from storage). The structural polysaccharides (chitin, cellulose) are correct as is.