Quiz on Qualitative and Quantitative Analysis of Carbohydrates

What does Benedict's test detect?

• Presence of starch

• Presence of proteins

• Presence of reducing sugars

• Presence of non-reducing sugars

Which of the following is an example of a reducing sugar?

• Glucose

• Starch

• Lactose

• Sucrose

What color change indicates a positive result in Benedict's test?

• Red to blue

• Blue to green, yellow, orange, or red

• Green to blue

• Blue to yellow

What is the role of Copper(II) ions in Benedict's reagent?

• To oxidize sugars

• To reduce to Copper(I) ions

• To stabilize the solution

• To change color

What is the main purpose of the glucose test?

• To measure protein levels

• To detect lipids

• To analyze amino acids

• To evaluate carbohydrate-related disorders

What is hyperglycemia?

• Low blood glucose level

• Normal blood glucose level

• High blood glucose level

• No blood glucose level

Which reagent is used in the glucose test?

• Benedict's reagent

• Copper sulfate

• Phenol

• Glucose oxidase

What is the significance of the color change in the glucose test?

• Indicates the presence of lipids

• Indicates the presence of proteins

• Indicates the concentration of glucose

• Indicates the presence of starch

What is the first step in the glucose test procedure?

• Mix the reagents

• Bring reagents and samples to room temperature

• Read the absorbance

• Add glucose standard

What is the purpose of sodium citrate in Benedict's reagent?

• To change color

• To provide alkaline conditions

• To stabilize copper ions

• To oxidize sugars