Similarities and differences in branched polysaccharides

Steps:

• Identify amylopectin as plant starch with α-1,4-glucose chains and α-1,6 branches every 24-30 residues.
• Recognize glycogen as animal starch with similar linkages but more frequent α-1,6 branches every 8-12 residues for rapid energy release.
• Compare statements: assume 1 is both are branched glucose polymers; 2 is incorrect (e.g., amylopectin has fewer branches); 3 is correct (e.g., both store energy).
• Select option matching correct statements 1 and 3.

Why B is correct:

• B pairs statements 1 (shared branched structure) and 3 (functional similarity in energy storage), aligning with polysaccharide definitions.

Why the others are wrong:

• A includes incorrect statement 2 on branching frequency.
• C omits correct statement 3 on shared role.
• D excludes correct statement 1 on basic composition.

Not enough information on exact statements, but B fits standard comparisons.

Final answer: B