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A Levels Biology (9700)•9700/11/M/J/22
Question 7 from 9700/11/M/J/22

Explanation

Polysaccharides with 1-4 glycosidic bonds

Steps:

  • Define 1-4 glycosidic bonds as linkages between C1 of one glucose and C4 of another.
  • Amylose features linear α-1,4 bonds.
  • Cellulose features linear β-1,4 bonds.
  • Glycogen features α-1,4 bonds in chains plus α-1,6 branches.
  • Option D lacks description, leaving the selection ambiguous.

Why C is correct:

  • Not enough information; all listed options (A, B, C) contain 1-4 glycosidic bonds by definition, though α vs. β differs.

Why the others are wrong:

  • A. Amylose contains α-1,4 glycosidic bonds.
  • B. Cellulose contains β-1,4 glycosidic bonds.
  • D. Not enough information.

Final answer: Not enough information.

Topic: Carbohydrates and lipids

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