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(A) 2-deoxyribose is reducing sugar. (...

(A) 2-deoxyribose is reducing sugar.
(R) 2-deoxyribose is constituent of DNA.

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:
B
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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.

Which of the following is reducing sugar ?

(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.

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AAKASH SERIES-BIOMOLECULES-OBJECTIVE EXERCISE-4 (ASSERTION (A) & REASON (R) TYPE QUESTIONS :)
  1. (A) Starch gives blue colour with iodine. (R) Starch form complex wi...

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

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

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

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

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

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

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

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

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

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

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

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

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

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  15. (A) Glycine is essential amino acid. (R) Glycine is optically active...

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  16. (A) The folding of polypeptide chains leads to globular proteins. (R...

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  17. (A) Alpha amino acids generally exists as zwitterions. (R) The basic...

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  18. (A) The melting points and solubility in water of amino acids are gene...

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  19. (A) Enzymes are globular proteins. (R) Enzymes provide active site t...

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  20. (A) Denaturation of a protein can be done on heating or by adding a su...

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