Question

a disaccharide is a carbohydrate made of two monosaccharides bonded together. one example of a disaccharide is sucrose.

in plant cells, glucose and fructose can react to form sucrose. plants with high levels of sucrose, like beets and sugar cane, are harvested by people to make granulated sugar for baking and cooking.

the model shows the chemical structure of sucrose.

image of sucrose structure with glucose and fructose

select the true statements.

• fructose and glucose have the same chemical structure.
• beets are a source of sucrose.
• monosaccharides are made by joining two disaccharides.
• sucrose can be made in plant cells.

Explanation:

1. For "Fructose and glucose have the same chemical structure": From the diagram, glucose and fructose have different ring structures (glucose is a 6 - membered ring, fructose has a 5 - membered ring part), so this is false.
2. For "Beets are a source of sucrose": The text says "Plants with high levels of sucrose, like beets and sugar cane, are harvested...", so this is true.
3. For "Monosaccharides are made by joining two disaccharides": The definition given is "A disaccharide is a carbohydrate made of two monosaccharides bonded together", so the reverse (monosaccharides from two disaccharides) is false.
4. For "Sucrose can be made in plant cells": The text says "In plant cells, glucose and fructose can react to form sucrose", so this is true.

Answer:

B. Beets are a source of sucrose
D. Sucrose can be made in plant cells