Question

question 4 0.25 pts monosaccharides are also known as reducing sugars proteins starch disaccharides question 5 0.25 pts in the benedicts reaction an electron is passed from a molecule of select to a select ion question 6 0.25 pts please complete the table for the benedict test assay: substance expected result water water liquid in tube will stay blue a monosaccharide select select a disaccharide select select a polysaccharide select select

Explanation:

Question 4: Monosaccharides have a free - aldehyde or ketone group which can reduce other substances, so they are reducing sugars. Proteins are made of amino - acids, starch is a polysaccharide, and disaccharides are made of two monosaccharide units.
Question 5: In the Benedict's reaction, an electron is passed from a reducing sugar (like a monosaccharide) to a copper ion. The copper ion in Benedict's reagent is in the +2 state (cupric) and gets reduced to the +1 state (cuprous).
Question 6: A monosaccharide is a reducing sugar. When a monosaccharide is tested with Benedict's reagent, a color change from blue to green, yellow, orange, or red occurs depending on the amount of reducing sugar present. Some disaccharides are also reducing sugars and will cause a color change, while non - reducing disaccharides will not. Polysaccharides like starch are non - reducing and will not cause a color change (the liquid in the tube will stay blue).

Answer:

Question 4: A. reducing sugars
Question 5: [Select] reducing sugar; [Select] copper
Question 6:
A monosaccharide: [Select] Glucose (a common monosaccharide); [Select] color change (green/yellow/orange/red depending on amount)
A disaccharide: [Select] Maltose (a reducing disaccharide); [Select] color change if reducing, stay blue if non - reducing
A polysaccharide: [Select] Starch; [Select] liquid in tube will stay blue