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(A) Sucrose is a non-reducing carbohydra...

(A) Sucrose is a non-reducing carbohydrate.
(R) In sucrose both the monosaccharides are in acetal form.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

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The correct Answer is:
A
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(A) Sucrose is not a reducing sugar. (R) In sucrose, glucose is in pyranose form and fructose is in furanose form.

(A) Sucrose is reducing sugar where as maltose is non-reducing sugar. (R) In disaccharides the reducing property does not depend upon the position of linkage between two monosaccharide units.

(A) Sucrose is an example of reducing sugar. (R) Sucrose gives silver mirror test with Tollens reagent.

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Incorrect statements among the following (A) Sucrose is reducing sugar (B) Two alpha- D- glucose units in maltose are linked by 1,4-linkage (C ) beta - D glucose and beta- D fructose units are linked by 1, 4-linkage in lactose (D) All polysaccharides are reducing nonsugars

Sucrose reacts with acetic anhydride to form

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Which one of the following sets of monosac- charides forms sucrose ?

(A) Acetic acid fit into C_x(H_2O)_y gneral formula of carbohydrates. (R) Acetic acid is not a carbohydrate

AAKASH SERIES-BIOMOLECULES-OBJECTIVE EXERCISE-4 (ASSERTION (A) & REASON (R) TYPE QUESTIONS :)
  1. (A) Sucrose is reducing sugar where as maltose is non-reducing sugar. ...

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  2. (A) Glucose gives a reddish-brown ppt with Fehling's solution. (R) R...

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  3. (A) Sucrose is a non-reducing carbohydrate. (R) In sucrose both the ...

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  4. (A) Glycogen is known as animal starch. (R) The structure of glycoge...

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  5. (A) Acetic acid fit into Cx(H2O)y gneral formula of carbohydrates. ...

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  6. (A) Honey has been used for a long time as an instant source of energy...

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  7. (A) Starch gives blue colour with iodine. (R) Starch form complex wi...

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  8. (A) DNA stores all the hereditary information of a biological species....

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  9. (A) 2-deoxyribose is reducing sugar. (R) 2-deoxyribose is constituen...

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  10. (A) Guanine unites with Cytosine but not with Thymine. (R) Guanine a...

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  11. (A) Adenine pairs up with thymine but not with cytosine. (R) With cy...

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  12. (A) The pyrimidine base thymine is present in RNA. (R) DNA controls ...

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  13. (A) In double helical structure of DNA, cytosine pairs with guanine wi...

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  14. (A) Uracil occur in RNA. (R) RNA controls the synthesis of proteins.

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  15. (A) DNA finger printing is used in forensic labs. (R) Every individu...

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  16. (A) DNA is the chemical basis of heredity and may be regarded as the r...

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  17. (A) RNA on hydrolysis gives equal content of guanine, cytocine and als...

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  18. (A) Thymine pairs with adenine whereas cytosine pairs with guanine in ...

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  19. (A) Glutamic acid is acidic amino acid. (R) Glutamic acid contains tw...

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  20. (A) The simplest alpha -amino acid is optically inactive. (R) Simple...

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