HARD
Earn 100

Which reagents are used in conversion of aldohexose to ketohexose?

Important Questions on Biomolecules

HARD
What are monosaccharides? Explain denaturation of proteins.
EASY
What is the carbohydrate containing -CHO group known as?
HARD

Define optical activity. How many optical isomers are possible for glucose.

HARD
What do you know about monosaccharides, disaccharides and polysaccharides? Explain with examples. How can glucose and starch be differentiated?
HARD
When each of the aldopentoses are stepped up by one carbon atom by Kiliani reaction followed by oxidation with HNO3, optically active or inactive dicarboxylic acids are produced. Which of the following is TRUE?
EASY

Write the chemical reaction to elucidate-

  • Glucose contains five -OH groups.
MEDIUM
What is the action of conc. HI with glucose ?
MEDIUM
For 'invert sugar', the correct statement(s) is (are)

(Given: specific rotations of +-sucrose, +-maltose, L---glucose and L-+-fructose in aqueous solution are + 66°, +140°, 52° and + 92°, respectively)
EASY
Write the product when D-glucose reacts with conc. HNO3.
MEDIUM
Write chemical reactions to show that open structure of D-glucose contains the following :
Five alcohol groups
MEDIUM
Give an example of aldohexose.
EASY
Which of the following is an example of ketohexose ?
HARD

Give definition of monosaccharide and disaccharide and give one example for each. Give one reaction for each group to detect the presence of -CHO and >C=O groups. Differentiate between glucose and fructose.

EASY

Write the chemical reaction to elucidate-

  • Glucose contains six carbon atoms in a straight chain.
MEDIUM
L-isomer of a compound A''C4H8O4gives a positive test with AgNH32+. Treatment of 'A' with acetic anhydride yields triacetate derivative. Compound 'A' produces an optically active compound B and an optically inactive compound C on treatment with bromine water and HNO3 respectively. Compound A is :
EASY
Synthesis of each molecule of glucose in photosynthesis involves
MEDIUM
Which one given below is a non-reducing sugar?
MEDIUM
Write chemical reactions to show that open structure of D-glucose contains the following :
Aldehyde as carbonyl group
EASY
The number of chiral centers in (±)- glucose is
MEDIUM
The Fischer presentation of D-glucose is given below

Question Image

The correct structure(s) of β-L- glucopyranose is(are)