Both Starch and Cellulose Are Made by Stringing Together Many

question 52

Multiple Choice

Both starch and cellulose are made by stringing together many glucose molecules,but starch is easily digested by humans while cellulose is indigestible.The starch polysaccharide has every bond occurring below the sugar rings while the bonds in cellulose alternate between one bond above the ring and the next below the ring.How can you explain the human's inability to digest cellulose?

• A) The enzyme that breaks down starch can only fit the specific bond configuration of bonds below the ring.
• B) Humans do not eat cellulose.
• C) The acidic molecules found in stomach acid cannot act on the bonds that are above the sugar rings in cellulose.
• D) The alternating bonds make the cellulose molecule too large and bulk to enter cells for digestion.
• E) Cellular respiration is only capable of breaking down specific bonds.

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Crowding

A situation characterized by a high density of people or objects in a particular area, often leading to discomfort or restricted movement.

Then

At that time or subsequently.

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To acquire something by paying for it; the act of purchasing.

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Characterized by confident and forceful behavior, often in expressing one's opinions or defending one's rights without being aggressive.