277814
Assertion : Enzymes lower the activation energy. Reason: A substrate molecule can be acted upon by a particular enzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) Activation energy is an external supply of energy which is needed for the initiation of the chemical reaction. Activation energy required for such a large number of reactions cannot be provided by living systems. Enzymes lower the activation energy required for a reaction. Enzymes are generally specific for their substrates.
NCERT Page-156 / N-115
Biomolecules
277815
Assertion: A co-enzymes or metal ions that is very tightly bound to enzyme protein is called prosthetic group.
Reason : A complete, catalytically active enzyme together with its bound prosthetic group is called apoenzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(b) Prosthetic group is an organic substance which is thermostable and firmly attached to the protein or apoenzyme portion during the complete catalytic cycle. Apoenzyme is a protein that forms an active enzyme system by combination with a coenzyme and determines the specificity of this system for a substrate.
NCERT Page-159 / N-117
Biomolecules
277816
Assertion : Glycosidic bonds are formed by dehydration.
Reason: Inpolysaccharides, individual monosaccharide is linked by glycosidic bond.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In polysaccharides, individual monosaccharide is linked by glycosidic bond. This bond is formed between two carbon atoms of two adjacent monosaccharides. A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. Glycosidic bonds are formed by dehydration.
NCERT Page-151
Biomolecules
277817
Assertion : In a DNA molecule, and of one strand compulsorily base pairs with and .
Reason: In between and , there are two -bond, whereas in between and , there are three -bonds.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In a DNA molecule, A-T rich parts melt before G-C rich parts because there are two -bond between and T whereas in between and , there are three -bond.
277814
Assertion : Enzymes lower the activation energy. Reason: A substrate molecule can be acted upon by a particular enzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) Activation energy is an external supply of energy which is needed for the initiation of the chemical reaction. Activation energy required for such a large number of reactions cannot be provided by living systems. Enzymes lower the activation energy required for a reaction. Enzymes are generally specific for their substrates.
NCERT Page-156 / N-115
Biomolecules
277815
Assertion: A co-enzymes or metal ions that is very tightly bound to enzyme protein is called prosthetic group.
Reason : A complete, catalytically active enzyme together with its bound prosthetic group is called apoenzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(b) Prosthetic group is an organic substance which is thermostable and firmly attached to the protein or apoenzyme portion during the complete catalytic cycle. Apoenzyme is a protein that forms an active enzyme system by combination with a coenzyme and determines the specificity of this system for a substrate.
NCERT Page-159 / N-117
Biomolecules
277816
Assertion : Glycosidic bonds are formed by dehydration.
Reason: Inpolysaccharides, individual monosaccharide is linked by glycosidic bond.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In polysaccharides, individual monosaccharide is linked by glycosidic bond. This bond is formed between two carbon atoms of two adjacent monosaccharides. A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. Glycosidic bonds are formed by dehydration.
NCERT Page-151
Biomolecules
277817
Assertion : In a DNA molecule, and of one strand compulsorily base pairs with and .
Reason: In between and , there are two -bond, whereas in between and , there are three -bonds.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In a DNA molecule, A-T rich parts melt before G-C rich parts because there are two -bond between and T whereas in between and , there are three -bond.
277814
Assertion : Enzymes lower the activation energy. Reason: A substrate molecule can be acted upon by a particular enzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) Activation energy is an external supply of energy which is needed for the initiation of the chemical reaction. Activation energy required for such a large number of reactions cannot be provided by living systems. Enzymes lower the activation energy required for a reaction. Enzymes are generally specific for their substrates.
NCERT Page-156 / N-115
Biomolecules
277815
Assertion: A co-enzymes or metal ions that is very tightly bound to enzyme protein is called prosthetic group.
Reason : A complete, catalytically active enzyme together with its bound prosthetic group is called apoenzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(b) Prosthetic group is an organic substance which is thermostable and firmly attached to the protein or apoenzyme portion during the complete catalytic cycle. Apoenzyme is a protein that forms an active enzyme system by combination with a coenzyme and determines the specificity of this system for a substrate.
NCERT Page-159 / N-117
Biomolecules
277816
Assertion : Glycosidic bonds are formed by dehydration.
Reason: Inpolysaccharides, individual monosaccharide is linked by glycosidic bond.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In polysaccharides, individual monosaccharide is linked by glycosidic bond. This bond is formed between two carbon atoms of two adjacent monosaccharides. A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. Glycosidic bonds are formed by dehydration.
NCERT Page-151
Biomolecules
277817
Assertion : In a DNA molecule, and of one strand compulsorily base pairs with and .
Reason: In between and , there are two -bond, whereas in between and , there are three -bonds.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In a DNA molecule, A-T rich parts melt before G-C rich parts because there are two -bond between and T whereas in between and , there are three -bond.
277814
Assertion : Enzymes lower the activation energy. Reason: A substrate molecule can be acted upon by a particular enzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) Activation energy is an external supply of energy which is needed for the initiation of the chemical reaction. Activation energy required for such a large number of reactions cannot be provided by living systems. Enzymes lower the activation energy required for a reaction. Enzymes are generally specific for their substrates.
NCERT Page-156 / N-115
Biomolecules
277815
Assertion: A co-enzymes or metal ions that is very tightly bound to enzyme protein is called prosthetic group.
Reason : A complete, catalytically active enzyme together with its bound prosthetic group is called apoenzyme.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(b) Prosthetic group is an organic substance which is thermostable and firmly attached to the protein or apoenzyme portion during the complete catalytic cycle. Apoenzyme is a protein that forms an active enzyme system by combination with a coenzyme and determines the specificity of this system for a substrate.
NCERT Page-159 / N-117
Biomolecules
277816
Assertion : Glycosidic bonds are formed by dehydration.
Reason: Inpolysaccharides, individual monosaccharide is linked by glycosidic bond.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In polysaccharides, individual monosaccharide is linked by glycosidic bond. This bond is formed between two carbon atoms of two adjacent monosaccharides. A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. Glycosidic bonds are formed by dehydration.
NCERT Page-151
Biomolecules
277817
Assertion : In a DNA molecule, and of one strand compulsorily base pairs with and .
Reason: In between and , there are two -bond, whereas in between and , there are three -bonds.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of(A)
Explanation:
(a) In a DNA molecule, A-T rich parts melt before G-C rich parts because there are two -bond between and T whereas in between and , there are three -bond.
