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[A] : Kreb s cycle is considered as amp...

[A] : Kreb s cycle is considered as amphibolic pathway.
[R]: Catabolic pathways converge on it and anabolic pathways diverge from it choose the correct Aatement.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

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The correct Answer is:
A
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Krebs' cycle is also called metabolic sink as it is a common pathway for

Resipratory pathway is believed to be a catabolic pathway. However, nature of TCA cycle is amphibolic. Explain.

Knowledge Check

  • Assertion. Krebs cycle is regarded the amphibolic (central) pathway of the cell. Reason. Catabolic pathways converge on it and anabolic pathways diverge from it.

    A
    If both A and R are true and R is the correct explanation of A.
    B
    If both A and R are true but R is not the correct explanation of A.
    C
    If A is true but R is false.
    D
    If both A and R are false.

  • Anabolic pathways….a….. energy and catabolic pathways……b…. energy

    A
    a-consume, b-release
    B
    a-release,b-consume
    C
    a-consume,b-consume
    D
    a-release,b-release

  • Catabolic and anabolic pathways are often coupled in cell because -

    A
    The intermediates of a catabolic pathway are used in the anabolic pathway
    B
    Both the pathway use the same energy
    C
    The free energy released from one pathway is used to drive other
    D
    Their enzymes are controlled by their same activators and inhibitors

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    Explore conceptually related problems

    Assertion : Respiratory pathway is considered as an amphibolic pathway Reason : It involves both anabolism and catabolism.

    Choose the correct statement/s about amphibolic pathways.

    A : Tricarboxylic acid cycle is an amphibolic pathway. R : A number of TCA cycle intermediates are used in various catabolic reactions only.

    I. Acetic acid can form cholesterol II. Anabolic pathway is endergonic while catabolic pathway is exergonic III. All biomolecules have a turn over i.e. they are constantly being changed into some other biomolecules and also made from other biomolecules. IV. Flow of metabolites through metabolic pathway has a definite rate and direction. It is called dynamic state of body constituents

    Assertion :- Respiratory path is an amphibolic pathway rather than as a catabolic one, Reason:- Respiratory pathway is involved in both anabolism and catabolism.

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