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Standard XII

Chemistry

Maltose

Study the str...

Question

Study the structure of maltose and mark the incorrect statement.

Maltose is composed of two

α - D -

glucose units

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C - 1

of one glucose is linked to

C - 4

of other unit

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It is a non-reducing sugar

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It is a disaccharide

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Solution

The correct option is C It is a non-reducing sugar
Maltose or malt sugar is a disaccharide composed of two glucose molecules connected with an alpha (1,4) glycosidic bond.

Maltose is a reducing sugar. It's two glucose molecules must be linked in such a way as to leave one anomeric carbon that can open to form an aldehyde group.

Hence, option C is an incorrect statement.

Suggest Corrections

Similar questions

Q. Identify the incorrect statements among the following.

(a) The relative sweetness of fructose is the maximum and it is a reducing sugar.
(b) The source of lactose is milk and it is reducing sugar
(c) Maltose possesses glycoside bond between one glucose unit and one fructose unit and it is reducing sugar
(d) Glucose possesses aldehyde group and it is a non-reducing sugar
(e) The molecular formula of sucrose is

C_{12} H_{22} O_{11}

and possess glycoside bond between two glucose units.

Q. Assertion :Sucrose is a non reducing sugar. Reason: Sucrose is a disaccharide formed by glycosidic linkage between

C - 1

α -

glucose and

C - 2

β -

fructose.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are correct statements and reason explains the assertion.
(b) Both assertion and reason are wrong statements.
(c) Assertion is correct statement and reason is wrong statement.
(d) Assertion is wrong statement and reason is correct statement.
(e) Assertion and reason both are correct statements but reason does not explain assertion.
Assertion (A) $β -$ glycosidic linkage is present in maltose.
Reason (R) Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.

Q. Select the correct option:

Read the given statements.
i. Fructose is the sweetest sugar.
ii. Glycine is the simplest amino acid.
iii. Lactose is a disaccharide composed of one molecule each of glucose and galactose.
iv. Cellulose is an unbranched chain of glucose molecules linked by

β

1, 4-glycosidic bond.
Which of the given statements are correct?

Q. Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between

C - 1

and

C - 4

and which linkages are between

C - 1

and

C - 6

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