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Which one of the following statements is not true regarding (+) Lactose?
- a)(+) Lactose, C12H22O11 contains 8-OH groups
- b)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactose
- c)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and a
molecule of D(+) galactose - d)(+) Lactose is reducing sugar and does not exhibit mutarotation
Correct answer is option 'D'. Can you explain this answer?
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Which one of the following statements is not true regarding (+) Lactos...
(+) lactose is a reducing sugar and it exhibit mutarotation
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Which one of the following statements is not true regarding (+) Lactos...
Lactose is a disaccharide sugar composed of two monosaccharides, namely D(+) glucose and D(+) galactose. It is commonly found in milk and dairy products. Let's analyze each statement to determine which one is not true:
a) Lactose, C12H22O11 contains 8-OH groups:
Lactose is composed of two monosaccharides, and each monosaccharide has several hydroxyl groups (-OH). Glucose has four hydroxyl groups, while galactose has six hydroxyl groups. Therefore, lactose, which is a combination of glucose and galactose, will have a total of ten hydroxyl groups. Hence, statement a) is true.
b) On hydrolysis, Lactose gives an equal amount of D(+) glucose and D(+) galactose:
Hydrolysis is the process of breaking a bond by adding water. When lactose undergoes hydrolysis, the bond between glucose and galactose is broken, resulting in the formation of one molecule of D(+) glucose and one molecule of D(+) galactose. Therefore, statement b) is true.
c) Lactose is a β-glycoside formed by the union of a molecule of D(+) glucose and a molecule of D(+) galactose:
Lactose is indeed a β-glycoside. It is formed by the linkage of the hydroxyl group on carbon-1 of glucose with the hydroxyl group on carbon-4 of galactose. Hence, statement c) is true.
d) Lactose is a reducing sugar and does not exhibit mutarotation:
This statement is not true. Lactose is a reducing sugar because it has a free anomeric carbon (carbon-1 of glucose) that can undergo oxidation. It can reduce certain reagents such as Benedict's solution or Fehling's solution. Additionally, lactose exhibits mutarotation, which is the spontaneous interconversion between α and β anomers in an aqueous solution. This occurs because the hemiacetal or hemiketal ring structure of the sugar can open and close, resulting in the formation of a new equilibrium mixture of α and β forms. Therefore, statement d) is false.
In conclusion, the correct answer is option D because lactose is a reducing sugar and exhibits mutarotation.
a) Lactose, C12H22O11 contains 8-OH groups:
Lactose is composed of two monosaccharides, and each monosaccharide has several hydroxyl groups (-OH). Glucose has four hydroxyl groups, while galactose has six hydroxyl groups. Therefore, lactose, which is a combination of glucose and galactose, will have a total of ten hydroxyl groups. Hence, statement a) is true.
b) On hydrolysis, Lactose gives an equal amount of D(+) glucose and D(+) galactose:
Hydrolysis is the process of breaking a bond by adding water. When lactose undergoes hydrolysis, the bond between glucose and galactose is broken, resulting in the formation of one molecule of D(+) glucose and one molecule of D(+) galactose. Therefore, statement b) is true.
c) Lactose is a β-glycoside formed by the union of a molecule of D(+) glucose and a molecule of D(+) galactose:
Lactose is indeed a β-glycoside. It is formed by the linkage of the hydroxyl group on carbon-1 of glucose with the hydroxyl group on carbon-4 of galactose. Hence, statement c) is true.
d) Lactose is a reducing sugar and does not exhibit mutarotation:
This statement is not true. Lactose is a reducing sugar because it has a free anomeric carbon (carbon-1 of glucose) that can undergo oxidation. It can reduce certain reagents such as Benedict's solution or Fehling's solution. Additionally, lactose exhibits mutarotation, which is the spontaneous interconversion between α and β anomers in an aqueous solution. This occurs because the hemiacetal or hemiketal ring structure of the sugar can open and close, resulting in the formation of a new equilibrium mixture of α and β forms. Therefore, statement d) is false.
In conclusion, the correct answer is option D because lactose is a reducing sugar and exhibits mutarotation.
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Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer?
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Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer?.
Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer?.
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Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which one of the following statements is not true regarding (+) Lactose?a)(+) Lactose, C12H22O11 contains 8-OH groupsb)On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactosec)(+) Lactose is a b-glycoside formed by the union of a molecule of D(+) glucose and amolecule of D(+) galactosed)(+) Lactose is reducing sugar and does not exhibit mutarotationCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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