Explain how alternating glucose units, straight chains and hydrogen bonding give cellulose mechanical strength.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2023–2026.
Which property is shared by starch and cellulose in plant cells? A. Both consist exclusively of branched beta-glucose chains B. Both are the main energy-storage polymer of the cell wall C. Their large polymer molecules are poorly soluble in water D. Both are…
Living systems display diversity from molecules to communities. (a) Outline how the structures of starch and cellulose support their functions. (b) Describe adaptations through which forest plants obtain light. (c) Explain how natural selection brings about…
A plant cell deposits cellulose microfibrils outside its plasma membrane. What is their principal contribution? A. They catalyse respiration in the mitochondria B. They store the cell’s genetic information C. They resist stretching and reinforce the cell wall…
Which description matches the glucose polymer that forms plant cell-wall microfibrils? A. Branched chains composed only of α-glucose B. Unbranched chains of β-glucose joined by glycosidic bonds C. A chain of alternating amino acids and phosphate groups D. A…
Identify the monomer used to form cellulose.
Explain how cellulose structure supports its functions.
The structural diagram shows part of a polysaccharide chain. (i) Identify the polysaccharide. (ii) Identify its monomer.
Which model represents a segment of cellulose? Some hydrogen and hydroxyl groups are omitted from the carbohydrate models. A. Model A B. Model B C. Model C D. Model D
The cyclic alpha and beta forms of glucose have the same molecular formula. Which structural distinction separates these two forms? A. A different number of hydroxyl groups B. The orientation of the hydroxyl group on carbon1 C. A different total number of…
The cyclic alpha and beta forms of glucose have the same molecular formula. Which structural distinction separates these two forms? A. A different number of hydroxyl groups B. The orientation of the hydroxyl group on carbon1 C. A different total number of…
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