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प्रश्न
What is monosaccharide?
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उत्तर
Monosaccharides are carbohydrates which do not hydrolyse further into smaller units of polyhydroxy aldehydes or ketones.
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संबंधित प्रश्न
Give scientific reasons:
The disaccharide sucrose gives negative Tollens test while the disaccharide maltose gives a positive Tollens test.
Give scientific reasons:
Hydrolysis of sucrose is called inversion.
Draw a neat diagram for the following:
Haworth formula of maltose
Glucose on oxidation with dilute nitric acid gives _______________
The glycosidic linkage in maltose is formed between _______________
Write the name of the unit to which glucose unit is linked to from sucrose.
Explain the preparation of glucose from sucrose.
Write chemical reaction for following conversions
glucose into gluconic acid
What is the action of the following reagents on glucose?
acetic anhydride
Write a chemical reaction to convert glucose into glucose cyanohydrin.
Which of the following type of carbohydrates cannot be hydrolyzed?
From the following identify an example of disaccharides.
Which enzymes would work sequentially on potatoes consumed by an individual?
Which of the following monosaccharides is a tetrose sugar?
Formation of lactose by conden ation results in the release of how many molecules of water?
The reserve food material in animals is ____________.
From the following identify the materials that are made up of cellulose.
i. Plant cell wall
ii. Exoskeleton of arthropods
iii. Paper from plant pulp
iv. Cotton fibre
By which of the following feature we can identify the relatively small DNA molecules of plasmids?
Which is the product obtained, when Br2 water reacts with glucose?
Match the Column I and Column II select the correct option.
| Column I | Column II | ||
| i. | Monosaccharides | a. | Stored energy in animals |
| ii. | Glycogen | b. | Polymer made from ß-glucose molecules |
| iii. | Cellulose | c. | Exoskeleton of arthropods |
| iv. | Chitin | d. | Building blocks of carbohydrates |
| e. | Plant hormone |
____________ do not give smaller sugar units on hydrolysis.
Monosaccharides are ______ in nature.
Identify the CORRECT combination.
Which reagent among the following is used to confirm presence of aldehydic carbonyl group in glucose?
All these carbohydrates contain \[\ce{1 -> 4β}\] glycosidic linkage, EXCEPT ____________.
Which element among the following is not present in saccharine?
Which one of the following is an oligosaccharide?
Which one of the following is a carbohydrate but does NOT follow the general formula of carbohydrate?
Which one of the following is generally applicable to polysaccharides?
Which one of the following carbohydrates is insoluble in water?
Which of the following statements is NOT true for glyceraldehyde?
Glucose and gluconic acid treated with dilute nitric acid forms saccharic acid. What does this indicate?
Which among the following statements is true for amylose?
What is the number of hydroxyl groups present in lactic acid?
Identify the number of oxygen atoms present in saccharic acid?
What is the molecular formula of glyceraldehyde?
How many moles of acetic acid are obtained in the reaction when one mole glucose is treated with excess acetic anhydride?
Which among the following is a product of hydrolysis of one mole raffinose?
When one mole of lactose is hydrolysed, the hydrolysate contains ____________.
Which among the following observations suggests that glucose also exists in cyclic form?
Which one given below is a non-reducing sugar?
\[\ce{Glucose ->[(HCN)] Product ->[(hydrolysis)] Product ->[(HI + Heat)] A}\], the compound A is:
Which of the following are epimers?
If 'n' represents total number of asymmetric carbon atoms in a compound, then the possible· number of optical isomers of the compound is ______.
The two monosaccharides in a disaccharide are held together by ______ bonds.
Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.
Consider the following reaction
\[\ce{A <-[Br2 - H2O] Glucose ->[HNO3] B}\]
Here, 'A' and 'B' are respectively.
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active.
Write the ring structure of glucose.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why are carbohydrates generally optically active?
Why carbohydrates are generally optically active?
Why carbohydrates are generally optically active?
Two monosaccharides are held together by ______ bond.
