Q: Sucrose on hydrolysis gives:

SurcoseHydrolysisα−D−Glucose+β−D−Fructose

Question 1

Sucrose on hydrolysis gives:

Accepted Answer

SurcoseHydrolysis​α−D−Glucose+β−D−Fructose

Question 2

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.

Accepted Answer

Potassium (K) activates many enzymes participate in oxidation of glucose to produce ATP and helps in the transmission of nerve signal along with Na.

Question 3

The non-essential amino acid among the following is:

Accepted Answer

Alanine

Question 4

The difference between amylose and amylopectin is :

Accepted Answer

Amylose and Amylopectin are polymers of α  D-glucose, so β− link is not possible. Amylose is linear with 1 →4α− linkage whereas Amylopectin is branched and has both 1→4  and 1→6α -linkages.So option (3) should be the correct option.

Question 5

The addition of a catalyst during a chemical reaction alters which of the following quantities?

Accepted Answer

Catalyst is going to affect the activation energy of a chemical reaction. Activation energy is the minimum energy required to from activated complex or Transition state.

Question 6

Which one given below is a non-reducing sugar?

Accepted Answer

Glycosidic bond involves reducing groups.Sucrose (No reducing sugar)

Question 7

Which of the following statements is not correct?

Accepted Answer

Due to denaturation of proteins, globules unfold and helix get uncoiled and protein loses its biological activity.

Question 8

What are monosaccharides?

Accepted Answer

Monosaccharides or simple sugars consist of one sugar unit that cannot be further broken down into simpler sugars. Examples of monosaccharides in foods are glucose, fructose and galactose.

Question 9

What are reducing sugars?

Accepted Answer

All those carbohydrates which contain a free aldehyde or Ketonic group and reduce Fehling's solution and Tollen's reagent are referred as a reducing Sugar. Examples of reducing sugar is galactose, glucose, glyceraldehyde, fructose, ribose, and xylose.

Question 10

Write two main functions of carbohydrates in plants.

Accepted Answer

Carbohydrates are the source of energy in plants. Their two main functions are growth and metabolism.

Question 11

Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose.

Accepted Answer

Monosaccharides are galactose, fructose, ribose, 2-deoxyribose.Disaccharides- Lactose, maltose

Question 12

What do you understand by the term glycosidic linkage?

Accepted Answer

Two monosaccharides on condensation produces a disaccharide. In the disaccharide molecule, the two cyclic structures each related to the reactant monosaccharide molecule are bonded by glycosidic linkage.

Question 13

What is glycogen? How is it different from starch?

Accepted Answer

The carbohydrates are stored in animal body as glycogen. It is also called animal starch and its structure is similar toamylopectin which means that it is a branched chain polymer of a-D-glucose units in which the chain is formed by C1​−C4​ glycosidic linkage whereas branching occurs by the formation of C1​− C6​ glycosidic linkage. One main difference between glycogen and amylopectin is the length of the chain. In amylopectin, the chain consists of 20−25a−D - glucose molecules whereas in glycogen, there are 10−14 molecules of a - D - glucose present. Glycogen is more branched than amylopectin. It is present mainly in liver, muscles and also in brain. Glycogen gets converted into glucose when the body needs it with the help of certain enzymes present in the body. Glycogen has also been found to be present in yeast and fungi.Starch is a major source of carbohydrates which are very much essential to the human body since they supply energy to the body. It occurs as granules mainly in seeds, fruits, tubers and also in the roots of the plants. The chief commercial sources of starch are wheat, maize, rice, potatoes etc.

Question 14

What are the hydrolysis products of (i) sucrose and (ii) lactose?

Accepted Answer

Glucose and Galactose are the hydrolysis products of lactose.

Question 15

What is the basic structural difference between starch and cellulose ?

Accepted Answer

Starch is a 1-4 linkage of α glucose monomers and Cellulose is formed by 1-4 linkage of β glucose monomers.

Question 16

Enumerate the reactions of D -glucose which cannot be explained by its open chain structures.

Accepted Answer

Following reactions cannot be explained by the open chain structure of glucose.(1) Glucose has aldehyde group but it does not react with 2,4 dinitro phenyl hydrazine, sodium bisulphite and Schiff's base.(2) There is no condensation reaction between glucose penta-acetate and hydroxylamine. This indicates that free aldehyde group is absent.

Filters

Filters

class

subject

topic

concept

difficulty

Solutions for Biomolecules Important Questions

Found the solution, but did not understand the concept?

Ask my first question