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What Is Dark Reaction

Which of the ...

Question

Which of the following statement regarding $C_{4}$ plants is false?

A

The primary

C O_{2}

acceptor is a 5 carbon molecule.

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B

The initial carboxylation reaction occurs in mesophyll.

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C

The leaves that fix

C O_{2}

have two cell types.

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D

The chloroplasts are dimorphic.

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E

The Calvin pathway does not take place in the mesophyll cells but does so only in the bundle sheath cells.

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Solution

The correct option is A The primary $C O_{2}$ acceptor is a 5 carbon molecule.
The primary carbon dioxide acceptor in $C_{4}$ plants is phosphoenol pyruvate (PEP), which is a 3 carbon compound. The first stable compound is a 4 carbon compound, oxaloacetic acid.

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Similar questions

Q. Select the characters not applicable to C

_{3}

_{2}

acceptor is PEP.

(ii) The plants have RuBisCO.

(iii) Initial carboxylation reaction occurs in bundle sheath cells.

(iv) Calvin cycle occurs only in bundle sheath cells.

Q. Select the wrongly matched pair with regard to

C_{4}

Q. Select the incorrect matched pair with regard to

C_{4}

(a)	Primary $C O_{2}$ fixation product	-	PGA
(b)	Site of initial carboxylation	-	Mesophyll cells
(c)	Primary $C O_{2}$ acceptor	-	PEP
(d)	$C_{4}$ plant	-	Maize
(e)	Location of enzyme RuBisCO	-	Bundle sheath cells

Select the incorrectly matched pair with regard to the C₄ cycle.

Q. Select the correct option:

Consider following statements with respect to the

C_{4}

pathway and select the correct ones.
(i) Mesophyll cells possess both RuBisCO and PEPcase enzymes.
(ii)Initial

C O_{2}

fixation occurs in mesophyll cells.
(iii)Final

C O_{2}

fixation occurs in bundle sheath cells.

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