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C3 Cycle

Question 27 W...

Question

Question 27
What is the basis for designating $C_{3} a n d C_{4}$ pathways of photosynthesis?

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Solution

The basis for designating $C_{3} a n d C_{4}$ pathways of photosynthesis is as follows
$\begin{matrix} C_{3} P a t h w a y & C_{4} P a t h w a y I n C a l v i n c y c l e o r C_{3} c y c l e (d a r k r e a c t i o n), & I n C_{4} p l a n t s, t h e C a l v i n c y c l e C_{3} c y c l e o c c u r s c a r b o n d i o x i d e i s f i x e d i n t o f i r s t s t a b l e & i n b u n d l e s h e a t h c e l l s . P r i o r t o r e a c h i n g t h e r e, c o m p o u n d c a l l e d 3 - P G A, (3 - p h o r p h o g l y c e r i c & t h e C O_{2} i s t r a p p e d b y m e s o p h y l l c e l l s a n d a c i d) w h i c h i s a 3 c a r b o n c o m p o u n d & f i x e d i n t o a 4 - c a r b o n s t a b l e p r o d u c t c a l l e d o x a l o a c e t i c a c i d . \end{matrix}$

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