NEET BIOLOGY

PLANT PHYSIOLOGY

PHOTOSYNTHESIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A scientist is trying to test a solution for simple sugars. What solution or indicator should he/she use?
A
Lugol’s (Iodine)
B
Benedict’s
C
Biuret solution
D
Sudan IV
Explanation: 

Detailed explanation-1: -Benedict’s reagent, also known as benedict’s solution is used in Benedict’s test for detecting simple sugars such as glucose. It is a bright blue solution that is prepared by mixing copper sulfate pentahydrate, sodium carbonate, and sodium citrate in distilled water.

Detailed explanation-2: -The Benedict’s Solution provides a test for the presence of simple sugars. If sugar is present, the Benedict’s Solution will turn color (shades of yellow, orange, brown).

Detailed explanation-3: -We can use a special reagent called Benedict’s solution to test for simple carbohydrates like glucose. Benedict’s solution is blue but, if simple carbohydrates are present, it will change colour – green/yellow if the amount is low and red if it is high.

Detailed explanation-4: -Testing for Reducing Sugars One millilitre of the analyte sample must be mixed with 2 millilitres of Benedict’s reagent and heated in a bath of boiling water for 3 to 5 minutes. The development of a brick-red coloured precipitate of cuprous oxide confirms the presence of reducing sugars in the analyte.

Detailed explanation-5: -This 100 ml bottle of Benedict’s Solution is a reagent. This chemical is a qualitative indicator for the presence of glucose, meaning it indicates the magnitude of sugar concentration.

There is 1 question to complete.