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Biomolecules

Description: This twst contains 25 multiple choice questio s on biomolecules.
Number of Questions: 25
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Tags: proteins fats carbohydrates etc. Carbohydrates
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________ acts as a storage poly saccharide in animals.

  1. Dextrans

  2. Inulin 

  3. Glycogen 

  4. Cellulose 


Correct Option: C
Explanation:

This is the main storage poly saccharide in animals. Hence, it is commonly called animal starch. Blue-green algae and fungi also store glycogen as fuel reserve. Like those of amylopectin, glycogen molecules are also large and highly branched (branch points are a, 1—6 linkages) polymers of thousands of D-glucose residues linked by a, 1-4 glycosidic bonds .

The carbohydrate used by blue-green algae and fungi as reserve fuel is

  1. dextrans

  2. inulin 

  3. cellulose

  4. glycogen 


Correct Option: D
Explanation:

This is the main storage poly saccharide in animals. Hence, it is commonly called animal starch. Blue-green algae and fungi also store glycogen as fuel reserve. Like those of amylopectin, glycogen molecules are also large and highly branched (branch points are a, 1—6 linkages) polymers of thousands of D-glucose residues linked by a, 1-4 glycosidic bonds .

The poly-saccharide having extensively branched and more compactly coiled concentrically glucose molecules is

  1. dextrans

  2. glycogen

  3. inulin 

  4. cellulose


Correct Option: B
Explanation:

This is the main storage poly saccharide in animals. Hence, it is commonly called animalstarch. Blue-green algae and fungi also store glycogen as fuel reserve. Like those of amylopectin, glycogen molecules are also large and highly branched (branch points are a, 1—6 linkages) polymers of thousands of D-glucose residues linked by a, 1-4 glycosidic bonds . In comparison to amylopectin molecules, however, glycogen molecules are much larger, more extensively branched and more compactly coiled concentrically.

The poly saccharide stored by vertebrates in liver and skeletal muscles is

  1. dextrans

  2. inulin

  3. glycogen

  4. cellulose


Correct Option: C
Explanation:

This is the main storage poly-saccharide in animals. Vertebrate animals store glycogen in liver and skeletal muscles. Stored glycogen may respectively account for upto 10% and 2% of liver and muscles by weight in man and other animals. Thus, a total of about 400 grams of glycogen (about 100 gm in liver and about 300 gm in skeletal muscles) is normally found in the body of an average adult human being. In liver cells, the glycogen is found in large, flattened and ellipsoidal grains.

Which of the following polysaccharides gives a red-violet colour on treating with iodine?

  1. Dextrans

  2. Inulin

  3. Cellulose

  4. Glycogen


Correct Option: D
Explanation:

This is the main storage poly-saccharide in animals. Hence, it is commonly called animal starch. Like amylopectin, glycogen gives a red-violet colour when treated with iodine. To be used in cells for energy, it is broken down by hydrolysis into its glucose monomers (glycogenolysis), but only liver cells release this glucose into the blood for utilization by all body cells. Glycogen stored in muscle cells is utilized only by these cells themselves.

Glycogenolysis is the process of break down of

  1. dextrans

  2. glycogen

  3. inulin

  4. cellulose


Correct Option: B
Explanation:

This is the main storage poly-saccharide in animals. Hence, it is commonly called animal starch. Like amylopectin, glycogen gives a red-violet colour when treated with iodine.  While being used in cells for energy, it is broken down by hydrolysis into its glucose monomers (glycogenolysis), but only liver cells release this glucose into the blood for utilization by all body cells. Glycogen stored in muscle cells is utilized only by these cells themselves.

Which among the following is not a poly-saccharide?

  1. Glycogen

  2. Dextrans

  3. Inulin

  4. None of these.


Correct Option: D
Explanation:

All are poly-saccharides.

Which of the following is not a storage homo-poly-saccharide?

  1. Glycogen

  2. Dextrans

  3. Inulin

  4. None of these


Correct Option: D
Explanation:

All are  storage homo-poly-saccharides .

Which of the following is secreted as sugary slimes by yeast and certain bacteria?

  1. Glycogen

  2. Inulin

  3. Dextrans

  4. Cellulose


Correct Option: C
Explanation:

They are also a class of storage homo-poly-saccharides of branched linear chains of D-glucose, but the sub-units in these are linked by a, 1-6 instead of a, 1-4 glycosidic bonds. These are secreted as sugary slimes by yeast and certain bacteria. Bacteria growing on surfaces of our teeth produce dextran which becomes important component of dental plaques or patches.

Which of the following is commonly known as animal starch?

  1. Glycogen 

  2. Dextrans

  3. Inulin 

  4. Cellulose


Correct Option: A
Explanation:

This is the main storage poly-saccharide in animals. Hence, it is commonly called animal starch. Blue-green algae and fungi can also store glycogen as fuel reserve. Like those of amylopectin, glycogen molecules are also large and highly branched (branch points are a, 1—6)polymers of thousands of D-glucose residues linked by a, 1-4 glycosidic bonds .

The _______ stored by the liver cells releases into the blood for utilization by all body cells.

  1. glycogen

  2. dextrans

  3. inulin

  4. cellulose


Correct Option: A
Explanation:

This is the main storage poly-saccharide in animals. Hence, it is commonly called animal starch. Blue-green algae and fungi store glycogen as fuel reserve. Like those of amylopectin, glycogen molecules are also large and highly branched (branch points are a, 1—6 linkages) polymers of thousands of D-glucose residues linked by a, 1-4 glycosidic bonds . In comparison to amylopectin molecules, however, glycogen molecules are much larger, more extensively branched and more compactly coiled concentrically. Vertebrate animals store glycogen in liver and skeletal muscles. Stored glycogen may respectively account for upto 10% and 2% of liver and muscles by weight in man and other animals. Thus, a total of about 400 grams of glycogen (about 100 gm in liver and about 300 gm in skeletal muscles) is normally found in the body of an average adult human being. In liver cells, the glycogen is found in large, flattened and ellipsoidal grains. Each grain is a cluster of small granules and each granule is a single, compact glycogen molecule. Like amylopectin, glycogen gives a red-violet colour when treated with iodine. To be used in cells for energy, it is broken down by hydrolysis into its glucose monomers (glycogenolysis), but only liver cells release this glucose into the blood for utilization by all body cells. Glycogen stored in muscle cells is utilized only by these cells themselves.

Synthetic form of __________ is used as blood plasma substitute.

  1. glycogen

  2. dextrans

  3. inulin

  4. cellulose


Correct Option: B
Explanation:

Dextrans are also a class of storage homo-poly-saccharides of branched linear chains of D-glucose, but the sub units in these are linked by a, 1-6 instead of a, 1-4 glycosidic bonds. Synthetic dextran is used as blood plasma substitute. When treated with epichlorohydrin, synthetic dextrans yield extremely hydrophilic gels which can hold large amounts of water. These gels are commercially used in preparation of fruit jellies. Sephadex (trade name) and some other similar dextran-gels are used in column chromatography.

The substance present in dental plaques or patches is

  1. dextrans

  2. glycogen

  3. inulin

  4. cellulose


Correct Option: A
Explanation:

They  are also a class of storage homo-poly-saccharides of branched linear chains of D-glucose, but the sub units in these are linked by a, 1-6 instead of a, 1-4 glycosidic bonds. They are secreted as sugary slimes by yeast and certain bacteria. Bacteria growing on surfaces of our teeth produce dextran which becomes important component of dental plaques or patches.

The homo-poly-saccharide occuring in the cell sap of plants is

  1. Dextrans

  2. Glycogen

  3. Inulin

  4. Cellulose


Correct Option: C
Explanation:

This is another storage homo-poly-saccharide found in the cell sap of certain plants. For example, the tuberous roots of Dahlia, artichokes, dendelions, etc., contain storage inulin. Molecules of inulin are formed of fructose subunits.

The gels obtained from _______ are used in preparation of fruit jellies.

  1. dextrans

  2. glycogen

  3. inulin

  4. cellulose


Correct Option: A
Explanation:

They are also a class of storage homo-poly-saccharides of branched linear chains of D-glucose, but the subunits in these are linked by a, 1-6 instead of a, 1-4 glycosidic bonds. Synthetic dextran is used as blood plasma substitute. When treated with epichlorohydrin, synthetic dextrans yield extremely hydrophilic gels which can hold large amounts of water. These gels are commercially used in preparation of fruit jellies. Sephadex (trade name) and some other similar dextran-gels are used in column chromatography.

________ gels are used in column chromatography.

  1. Glycogen

  2. Inulin

  3. Cellulose

  4. Dextrans


Correct Option: D
Explanation:

They are also a class of storage homo-poly-saccharides of branched linear chains of D-glucose, but the subunits in these are linked by a, 1-6 instead of a, 1-4 glycosidic bonds. Synthetic dextran is used as blood plasma substitute. When treated with epichlorohydrin, synthetic dextrans yield extremely hydrophilic gels which can hold large amounts of water. These gels are commercially used in preparation of fruit jellies. Sephadex (trade name) and some other similar dextran-gels are used in column chromatography.

Which of the following yield extremely hydrophilic gels on treatment with epichlorohydrin?

  1. Glycogen

  2. Inulin

  3. Dextrans

  4. Cellulose


Correct Option: C
Explanation:

They are also a class of storage homo-poly-saccharides of branched linear chains of D-glucose, but the subunits in these are linked by a, 1-6 instead of a, 1-4 glycosidic bonds. Synthetic dextran is used as blood plasma substitute. When treated with epichlorohydrin, synthetic dextrans yield extremely hydrophilic gels which can hold large amounts of water. These gels are commercially used in preparation of fruit jellies. Sephadex (trade name) and some other similar dextran-gels are used in column chromatography.

The tuberous roots of Dahlia contains

  1. Dextrans

  2. Inulin

  3. Glycogen

  4. Cellulose


Correct Option: B
Explanation:

This is another storage homo-poly-saccharide found in the cell sap of certain plants. For example, the tuberous roots of Dahlia, artichokes, dendelions, etc., contain storage inulin. Molecules of inulin are formed of fructose subunits.

Which of the following is composed of fructose subunits?

  1. Dextrans

  2. Inulin

  3. Glycogen

  4. Cellulose


Correct Option: B
Explanation:

This is another storage homo-poly-saccharide found in the cell sap of certain plants. For example, the tuberous roots of Dahlia, artichokes, dendelions, etc., contain storage inulin. Molecules of inulin are formed of fructose subunits.

The dandelion is a perennial, herbaceous plant with long, lance-shaped leaves. Its roots contain

  1. dextrans

  2. glycogen

  3. cellulose

  4. inulin


Correct Option: D
Explanation:

This is another storage homo-poly-saccharide found in the cell sap of certain plants. For example, the tuberous roots of Dahlia, artichokes, dendelions, etc., contain storage inulin. Molecules of inulin are formed of fructose subunits.

Which of the following is the most abundant organic compound?

  1. Glycogen

  2. Dextrans

  3. Inulin

  4. Cellulose


Correct Option: D
Explanation:

This is the most abundant organic compound, most abundant biopolymer, and most abundant poly-saccharide found on earth. Like those of amylose, molecules of cellulose are unbranched homopolymers of about ten to fifteen thousand D-glucose monomers which are, however, linked not by a, 1-4 but by P, 1-4 glycosidic bonds.

The most abundant biopolymer in nature is

  1. Dextrans

  2. Cellulose

  3. Glycogen

  4. Inulin


Correct Option: B
Explanation:

This is the most abundant organic compound, most abundant biopolymer, and most abundant polysaccharide found on earth. Like those of amylose, molecules of cellulose are unbranched homopolymers of about ten to fifteen thousand D-glucose monomers which are, however, linked not by a, 1-4 but by P, 1-4 glycosidic bonds.

Most of the poly-saccharides found on earth occur in form of

  1. Dextrans

  2. Glycogen

  3. Cellulose

  4. Inulin


Correct Option: C
Explanation:

This is the most abundant organic compound, most abundant biopolymer, and most abundant polysaccharide found on earth. Like those of amylose, molecules of cellulose are unbranched homopolymers of about ten to fifteen thousand D-glucose monomers which are, however, linked not by a, 1-4 but by P, 1-4 glycosidic bonds.

The component of plant cell walls is known as

  1. cellulose

  2. dextrans

  3. inulin

  4. glycogen


Correct Option: A
Explanation:

Cellulose is the water insoluble roughage part of the group. It is an important component of plant cell walls and the most frequent poly-saccharide at all. Cellulose is not only a roughage but also a food additives .Like those of amylose, molecules of cellulose are unbranched homopolymers of about ten to fifteen thousand D-glucose monomers which are, however, linked not by a, 1-4 but by P, 1-4 glycosidic bonds.

Human beings can not digest __________

  1. Cellulose

  2. Dextrans

  3. Glycogen

  4. Inulin


Correct Option: A
Explanation:

This is the most abundant organic compound, most abundant biopolymer, and most abundant polysaccharide found on earth. Like those of amylose, molecules of cellulose are unbranched homopolymers of about ten to fifteen thousand D-glucose monomers which are, however, linked not by a, 1-4 but by P, 1-4 glycosidic bonds.

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