278041
Assertion : Coenzymes serve as co-factors in a number of different enzyme catalysed reactions.
Reason : Coenzymes and prosthetic groups are cofactors. I
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) Cofactor may be inorganic or organic in nature. Organic cofactors are of two types- coenzymes and prosthetic groups. Coenzymes are easily separable nonprotein organic cofactors. Prosthetic groups are nonprotein organic cofactors firmly attached to apoenzymes (protein part of enzyme).
NCERT Page-159 / N-117
BIOMOLECULES(NCERT)
278042
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(NCERT)
278043
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(NCERT)
278045
Assertion : In a DNA molecule, $A$ and $G$ of one strand compulsorily base pairs with $T$ and $C$.
Reason: In between $A$ and $T$, there are two $\text{H}$-bond, whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bonds.
1 (A) is correct but (R) is not correct
2 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
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 $\text{H}$-bond between $\text{A}$ and T whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bond.
278041
Assertion : Coenzymes serve as co-factors in a number of different enzyme catalysed reactions.
Reason : Coenzymes and prosthetic groups are cofactors. I
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) Cofactor may be inorganic or organic in nature. Organic cofactors are of two types- coenzymes and prosthetic groups. Coenzymes are easily separable nonprotein organic cofactors. Prosthetic groups are nonprotein organic cofactors firmly attached to apoenzymes (protein part of enzyme).
NCERT Page-159 / N-117
BIOMOLECULES(NCERT)
278042
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(NCERT)
278043
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(NCERT)
278045
Assertion : In a DNA molecule, $A$ and $G$ of one strand compulsorily base pairs with $T$ and $C$.
Reason: In between $A$ and $T$, there are two $\text{H}$-bond, whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bonds.
1 (A) is correct but (R) is not correct
2 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
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 $\text{H}$-bond between $\text{A}$ and T whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bond.
278041
Assertion : Coenzymes serve as co-factors in a number of different enzyme catalysed reactions.
Reason : Coenzymes and prosthetic groups are cofactors. I
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) Cofactor may be inorganic or organic in nature. Organic cofactors are of two types- coenzymes and prosthetic groups. Coenzymes are easily separable nonprotein organic cofactors. Prosthetic groups are nonprotein organic cofactors firmly attached to apoenzymes (protein part of enzyme).
NCERT Page-159 / N-117
BIOMOLECULES(NCERT)
278042
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(NCERT)
278043
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(NCERT)
278045
Assertion : In a DNA molecule, $A$ and $G$ of one strand compulsorily base pairs with $T$ and $C$.
Reason: In between $A$ and $T$, there are two $\text{H}$-bond, whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bonds.
1 (A) is correct but (R) is not correct
2 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
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 $\text{H}$-bond between $\text{A}$ and T whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bond.
278041
Assertion : Coenzymes serve as co-factors in a number of different enzyme catalysed reactions.
Reason : Coenzymes and prosthetic groups are cofactors. I
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) Cofactor may be inorganic or organic in nature. Organic cofactors are of two types- coenzymes and prosthetic groups. Coenzymes are easily separable nonprotein organic cofactors. Prosthetic groups are nonprotein organic cofactors firmly attached to apoenzymes (protein part of enzyme).
NCERT Page-159 / N-117
BIOMOLECULES(NCERT)
278042
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(NCERT)
278043
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(NCERT)
278045
Assertion : In a DNA molecule, $A$ and $G$ of one strand compulsorily base pairs with $T$ and $C$.
Reason: In between $A$ and $T$, there are two $\text{H}$-bond, whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bonds.
1 (A) is correct but (R) is not correct
2 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
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 $\text{H}$-bond between $\text{A}$ and T whereas in between $\text{G}$ and $\text{C}$, there are three $\text{H}$-bond.
