Free Carbohydrates MCQs with Answers
12 Carbohydrates MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
12 questions · page 2 of 2
11. An oligosaccharide is made up of at least:
- A. two saccharide units
- B. ten saccharide units
- C. three to ten saccharide units
- D. more than ten saccharide units
Explanation: This is the option marked correct in the official UHS answer key, taking oligosaccharide in its broad sense of a few sugar units, beginning at two. Many textbooks instead reserve disaccharide for two units and define oligosaccharides as three to ten, which is why option (c) is such a strong distractor. Anything beyond about ten units is a polysaccharide.
Correct answer: two saccharide units12. Which one of the following biomolecules is a polymer/polysaccharide?
- A. Sucrose
- B. Pentose
- C. Lactose
- D. Glycogen
Explanation: Glycogen is a highly branched polymer of thousands of glucose units, stored in liver and muscle as the animal energy reserve. Sucrose and lactose are disaccharides of just two units and pentose is a single five carbon sugar, so none of them is a polymer. The test is whether the molecule can be hydrolysed into many repeating units.
Correct answer: Glycogen