Can you explain why twelve molecules of water as substrate are used in the equation given?
$6 C O_{2} + 12 H_{2} O L i g h t \to C_{6} H_{12} O_{6} + 6 H_{2} O + 6 O_{2}$ .

Open in App

Solution

The net reaction of photosynthesis is :
$6 C O_{2} + 12 H_{2} O L i g h t \to C_{6} H_{12} O_{6} + 6 H_{2} O + 6 O_{2}$
From this reaction, it is clear that to form one molecule of glucose, six molecules of carbon dioxide are required.
Products of light reaction required in dark reactions to form one molecule of glucose are 12 molecules of NADPH and 18 molecules of ATP.
For forming 2 molecules of NADPH from NADP $^{+}$ , 2 molecules of water are required so that demand of 4 electrons and protons can be satisfied.
Two molecules of water split to form a molecule of oxygen and the respective number of electrons and hydrogen ions are also formed.
Now for producing 12 molecules of NADPH, a total of 12 molecules of water are required.

Suggest Corrections

Similar questions

6 C O_{2} + 12 H_{2} O L i g h t \to C_{6} H_{12} O_{6} + 6 H_{2} O + 6 O_{2}

.
where

C_{6} H_{12} O_{6}

represents glucose. The

O_{2}

released is from water; this was proved using radio isotope techniques. Note that this is not a single reaction but description of a multistep process called photosynthesis. Can you explain why twelve molecules of water as substrate are used in the equation given?

6 C O_{2} + 12 H_{2} O L i g h t - -- \to C_{6} H_{12} O_{6} + 6 H_{2} O + 6 O_{2}

where

C_{6} H_{12} O_{6}

represents glucose. The

O_{2}

released is form water ; this was proved using radio isotope techniques. Note that this is not a single reaction but description of a multistep process called photosynthesis. Can you explain why twelve molecules of water as substrate are used in the equation given above ?

C_{6} H_{12} O_{6}

6 O_{2}

→

6 C O_{2}

6 H_{2} O

+ ATP

The given equation indicates which of the following activities in plants?

Question 27
Which of the following equations is the summary of photosynthesis?

(a) $6 C O_{2} + 12 H_{2} O \to C_{6} H_{12} O_{6} + 6 O_{2} + 6 H_{2} O$
(b) $6 C O_{2} + H_{2} O + S u n l i g h t \to C_{6} H_{12} O_{6} + O_{2} + 6 H_{2} O$
(c) $6 C O_{2} + 12 H_{2} O + C h l o r o p h y l l + S u n l i g h t \to C_{6} H_{12} O_{6} + 6 O_{2} + 6 H_{2} O$
(d) $6 C O_{2} + 12 H_{2} O + C h l o r o p h y l l + S u n l i g h t \to C_{6} H_{12} O_{6} + 6 C O_{2} + 6 H_{2} O$

Complete the following biochemical equation of respiration.

$C_{6} H_{12} O_{6} + 6 O_{2} \to$

Join BYJU'S Learning Program

Can you explain why twelve molecules of water as substrate are used in the equation given?6CO2+12H2OLight→C6H12O6+6H2O+6O2.

Can you explain why twelve molecules of water as substrate are used in the equation given?
$6 C O_{2} + 12 H_{2} O L i g h t \to C_{6} H_{12} O_{6} + 6 H_{2} O + 6 O_{2}$ .