Which statement is wrong for Krebs' cycle?

  • A
    There is one point in the cycle where $FAD^+$ is reduced to $FADH_2$.
  • B
    During conversion of succinyl $CoA$ to succinic acid,a molecule of $GTP$ is synthesised.
  • C
    The cycle starts with condensation of acetyl group (acetyl $CoA$) with pyruvic acid to yield citric acid.
  • D
    There are three points in the cycle where $NAD^+$ is reduced to $NADH + H^+$.

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Krebs' cycle begins with the reaction

How many $CO_2$ molecules are produced in the Krebs cycle when one molecule of pyruvic acid enters and is oxidized completely?

Oxidation of succinate to fumarate in the Kreb's cycle is due to

Identify $A$ and $B$ in the given reaction:
$\text{Pyruvic acid} + \text{CoA} + \text{NAD}^+ \xrightarrow{\text{Mg}^{2+}} A + B + \text{NADH} + \text{H}^+$

Krebs' cycle was discovered by Krebs in pigeon muscles in $1940$. Which step is called gateway step/link reaction/transition reaction in respiration?

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