Home
Class 11
BIOLOGY
Sugars are technically called carbohydra...

Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiple of `C(H_(2)O)`. Hexoses therefore have six carbons, twelve hydrogens and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.

A

Fructose

B

Erythrose

C

Ribulose

D

Ribose

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • BIOMOLECULES

    MODERN PUBLICATION|Exercise NCERT FILE NCERT EXEMPLAR PROBLEMS (VERY SHORT ANSWER TYPE QUESTIONS)|7 Videos

  • BIOMOLECULES

    MODERN PUBLICATION|Exercise NCERT FILE NCERT EXEMPLAR PROBLEMS (SHORT ANSWER TYPE QUESTIONS )|5 Videos

  • BIOMOLECULES

    MODERN PUBLICATION|Exercise NCERT FILE (NCERT EXERCISE QUESTIONS )|13 Videos

  • BIOLOGICAL CLASSIFICATION

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|16 Videos

  • BODY FLUIDS AND CIRCULATION

    MODERN PUBLICATION|Exercise Chapter Practice Test|15 Videos

Similar Questions

Explore conceptually related problems

Carbohydrates are compounds containing only carbon, hydrogen and oxygen having the atomic ratio of H : O as 2 : 1 . When heated in the absence of air, these compounds decompose to form carbon and water. a. If 310 g of a carbohydrates leaves a residue of 124 g of carbon on heating in absence of air, whatis the empirical formula of the carbohydrate? If 0.0833 mole of hte carbohydrate contains 1.0 g hydrogen , what is the molecular formula of the carbohydrate?

An organic compound having molecular formula C_(2)H_(6)O undergoes oxidation with K_(2)Cr_(2)O_(7)//H_(2)SO_(4) to produce X which contains 40% carbon, 6.7% hydrogen and 53.3% oxygen. The molecular formula of the compound X is

Monosaccharides are polyhydric aldehydes and ketones which cannot be hydrolysed into simpler carbohydrates. The monosaccharides containing -CHO group are called aldoses while those containing C=O group are called ketoses. The aldehyde group is always present at C_(1) while keto group is generally present at C_(2) . All monosaccharides are oxidised by Tollen's reagent and Fehling solution and are called reducing sugars. The monosaccharide molecules may be assigned D and L-configurations depending upon whether the configuration of the molecule is related to D- or L-glyceraldehyde. If the -OH group is attached to the carbon adjacent to the -CH_(2)OH group (last chiral carbon) is on the right hand side, it is assigned D-configuration. The molecule is assigned L-configuration if the -OH group attached to the carbon adjacent to the -CH_(2)OH group is on the left. The monosaccharides contain one or more chiral carbon atoms. Pentoses and hexoses have cyclic structures furanose (five membered) and pyranose (six membered). During cyclization, C_(1) in aldohexoses and C_(2) in fructose become chiral and the newly formed -OH group may be either on the left or on the right in Fischer projection formulae. These monosaccharides, therefore, exist in two stereoisomeric forms called alpha -anomer and beta -anomer while C_(1) and C_(2) are called glycosidic or anomeric carbon. The bonds joining glycosidic carbon are called glycosidic linkages. D(+) glucose exists in two stereoisomeric forms, alpha -D- glucose and beta -D-glucose. When either of these two forms of glucose i.e., alpha-D- glucose are dissolved in water and allowed to stand, these get slowly converted into other form and an equilibrium mixture of both is formed. This process is called mutarotation. The maximum number of optical isomers of glucose expected are