Question

Which of the following statements are true regarding C₄ plants?

	a.	Initial fixation of CO2 is catalyzed by PEP carboxylase
	b.	Fewer ATP are used as compared to C3 plants
	c.	Stomata are only open at night
	d.	Photorespiration is increased
	e.	All of the above are correct

1. Which of the reactants becomes reduced in the reaction below?

   C₆H₁₂O₆ + 10 NAD⁺ + 2 FAD + ADP + P_i à 6 CO₂ + 10 NADH + 2 FADH₂ + ATP

   	a.	Glucose
   	b.	Flavin adenine dinucleotide
   	c.	Nicotinamide adenine dinucleotide
   	d.	Adenosine diphosphate
   	e.	Both B and C

2. Which of the following statements regarding the electron transport chain and oxidative phosphorylation is true?

   	a.	It is the step of cellular respiration that generates the most ATP
   	b.	It generates more ATP than fermentation
   	c.	A mutation in complex II would still allow ATP to be produced via oxidative phosphorylation, but at a reduced capacity
   	d.	ATP production is dependent upon the generation of a proton gradient
   	e.	All of the above statements are true

Answer 1

1) in c4 plants initial fixation of CO2 is performed by PEP carboxylase