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What is hemicellulose?

Important Questions on Chemical Constituents of Living Cells

EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
The two functional groups characteristic of sugars are
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
The rigidity of cellulose is due to:
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Identify the substances having glycosidic bond and peptide bond, respectively in their structure.
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Choose the correct statements from the following:
A) In a polysaccharide chain, the right end is reducing end and the left end is non-reducing end.
B) In a protein, the right end is a first amino acid called N-end, and the left end is called C-terminal.
C) Concanavalin A is a drug used to cure cancer along with vinblastin and curcumin.
D) GLUT-4 enables glucose transport into cells.
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Which of the following is a branched polymer, having branched chain polysaccharide units ?
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Glycogen is an example of
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
A polysaccharide 'X' on boiling with dil H2SO4 at 393 K under 2-3 atm pressure yields 'Y' 'Y' on treatment with bromine water gives gluconic acid. 'X' contains β-glycosidic linkages only. Compound 'X' is :
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates

Assertion (A): Starch can hold iodine molecules whereas cellulose cannot hold iodine molecules.

Reason R: Cellulose forms helical secondary structures whereas starch does not contain complex helices.

The correct answer is:

EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates

Identify the product of the following reaction.

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MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates

Give the plausible explanation for the following:

Starch and cellulose both contain glucose unit as monomer, yet they are structurally different.

MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
What is glycogen? How is it different from starch?
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Which of the given statements is incorrect about glycogen?
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Starch is changed into disaccharides in presence of:
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
What is the basic structural difference between starch and cellulose?
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates

The structure of the following polymer is:

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MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Carbohydrates are essential for life in both plants and animals. Name the carbohydrates that are used as storage molecules in plants and animals, also name the carbohydrate which is present in wood or in the fibre of cotton cloth.
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Which one is polymer?
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Match the biological molecule listed under column I with their biological functions listed under column II and select the answer which gives the correct combination of alphabets of the two columns.
 

 		 Column I
(Biological molecules)		   Column II
(Functions)
 A.  Glycogen  p.  Hormone
 B.  Globulin  q.  Biocatalyst
 C.  Steroids  r.  Antibody
 D.  Thrombin  s.  Storage product
HARD
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Enlist the natural sources, structural units and functions of the polysaccharides starch, cellulose and glycogen.
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cells>Carbohydrates
Cellulose, the most important constituent of the plant cell wall is made up of