Which among the following is liberated when citrate is converted to cis-aconitate?

H_{2} O

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H_{2}

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H_{2} O_{2}

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{CO}_{2}

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Solution

The correct option is A $H_{2} O$
Citrate is isomerized to asocitrate by aconitase. This is a reversible reaction. The reaction occurs in two steps:
1. Dehydration to cis-aconitate by release of a molecule of water.
2. Rehydration to isocitrate by utilising a molecule of water.

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Similar questions

When a metal is reacted with water. Among the following which gas will be liberated?

Column I	Column II
1. $F r u c t o s e 1, 6 d i p h o s p h a t e \to 3 P G A L + D H A P$	a. Enolase
2. $C i t r a t e \to C i s - a c o n i t a t e$	b. Thiokinase
3. $S u c c i n y l C o . A \to s u c c i n a t e$	c. Aconitase
4. $2 P G A \to P E P A$	d. Aldolase

	I.		II.
$1$ .	Fructose $1, 6$ diphosphate $\to 3$ PGAL $+$ DHAP	a.	Enolase
$2$ .	Citrate $\to$ Cis - aconitate	b.	Thiokinase
$3$ .	Succinyl Co. A $\to$ Succinate	c.	Aconitase
$4$ .	$2$ PGA $\to$ PEPA	d.	Aldolase

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