Question

plants also make the polysaccharide starch to store excess glucose. starch is made from many molecules of glucose joined together in long chains. one form of starch, amylopectin, has long chains with several branches.
amylopectin structure (starch)
branched starch
cellulose structure
cellulose fibers
how does starch compare to cellulose? complete the sentences.
plants use cellulose for ▼. they use starch, such as amylopectin, for ▼. unlike cellulose, the long chains of glucose in amylopectin form ▼

Explanation:

1. For the first blank: Cellulose is a major component of plant cell walls, providing structural support. So plants use cellulose for structural support (e.g., cell wall formation).
2. For the second blank: The text states "Plants also make the polysaccharide starch to store excess glucose", so starch (like amylopectin) is used for storing excess glucose (energy storage).
3. For the third blank: From the diagram, amylopectin (starch) has "long chains with several branches", while cellulose has linear, unbranched chains. So the long chains of glucose in amylopectin form branched structures (or branches).

Answer:

• Plants use cellulose for \boxed{structural support (e.g., cell wall formation)}.
• They use starch, such as amylopectin, for \boxed{storing excess glucose (energy storage)}.
• Unlike cellulose, the long chains of glucose in amylopectin form \boxed{branched structures (or branches)}.