English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Assertion: Deoxyribose, CX5HX10OX4 is not a carbohydrate. Reason: Carbohydrates are hydrates of carbon so compounds which follow CXx(HX2O)Xy formula are carbohydrates. - Chemistry

Advertisements
Advertisements

Question

Assertion: Deoxyribose, \[\ce{C5H10O4}\] is not a carbohydrate.

Reason: Carbohydrates are hydrates of carbon so compounds which follow \[\ce{C_x(H2O)_y}\] formula are carbohydrates.

Options

  • Assertion and reason both are correct statements and reason explains the assertion.

  • Both assertion and reason are wrong statements.

  • Assertion is correct statement and reason is wrong statement.

  • Assertion is wrong statement and reason is correct statement.

  • Assertion and reason both are correct statements but reason does not explain assertion.

MCQ
Advertisements

Solution

Both assertion and reason are wrong statements.

Explanation:

Deoxyribose is a carbohydrate and is the sugar moiety of DNA. Carbohydrates are optically active polyhydroxy aldehyde or polyhydroxy ketone or substances which give these on hydrolysis.

shaalaa.com
  Is there an error in this question or solution?
Chapter 14: Biomolecules - Multiple Choice Questions (Type - I) [Page 213]

APPEARS IN

NCERT Exemplar Chemistry [English] Class 12
Chapter 14 Biomolecules
Multiple Choice Questions (Type - I) | Q 64 | Page 213

RELATED QUESTIONS

Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Explain.


What are the expected products of hydrolysis of lactose?


What are reducing sugars?


Glycosidic linkage is found between ____________.


Which of the following gives a positive Fehling solution test?


The two functional groups present in a typical carbohydrate are:


A carbohydrate that cannot be hydrolysed into simpler units is called ____________.


Reducing sugars reduce ____________.


Glucose can’t be classified as ____________.


Structure of a disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units.


Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?

(i) Ribose

(ii) Glucose

(iii) Fructose

(iv) Galactose


Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called?


Monosaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule are also considered for classification. In which class of monosaccharide will you place fructose?


Account for the following:

Glucose is a reducing sugar


The following questions are case-based questions. Read the passage carefully and answer the questions that follow:

Carbohydrates are optically active polyhydroxy aldehydes and ketones. They are also called saccharides. All those carbohydrates which reduce Fehling's solution and Tollen's reagent are referred to as reducing sugars. Glucose, the most important source of energy for mammals, is obtained by the hydrolysis of starch. Vitamins are accessory food factors required in the diet. Proteins are the polymers of α-amino acids and perform various structural and dynamic functions in the organisms. Deficiency of vitamins leads to many diseases.

Answer the following:

(a) The penta-acetate of glucose does not react with Hydroxylamine. What does it indicate? (1)

(b) Why cannot vitamin C be stored in our body? (1)

(c) Define the following as related to proteins: (2)

  1. Peptide linkage
  2. Denaturation

OR

(c) Define the following as related to carbohydrates: (2)

  1. Anomers
  2. Glycosidic linkage

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×