Question

Which of the following is required for transformation of oxaloacetic acid into malic acid
A) NADP
B) NADP{{H}_{2}}
C) Both [a] and [b]
D) None of the above

Answer 1

the answer to your question is C

Answer 2

Answer:

The right answer is B) NADP{{H}_{2}}.

Explanation:

• NADP{{H}_{2}} is required for the transformation of oxaloacetic acid into malic acid.
• The conversion of oxaloacetic acid into malic acid takes place in C4 plants through the C4 cycle by the process of photosynthesis.
• CO2 fixation takes place in mesophyll cells, with the help of the enzyme pepcase.
• The primary CO2 accepted here is a three-carbon molecule which is phosphoenolpyruvate.
• Now phosphoenolpyruvate in the presence of enzyme forms the first stable product which is a 4 carbon compound that is oxaloacetic acid.
• In mesophyll cells, the enzyme rubisco is not present so this process takes place in the presence of the enzyme pepcase.
• The oxaloacetate formed gets immediately converted into malic acid by the enzyme malic dehydrogenase and NADP{{H}_{2}} and goes into the bundle cells.
• Therefore the right answer here is NADP{{H}_{2}}.