Question
Biology Question on Photorespiration
The substrate for photorespiration is
A
phosphoglyceric acid
B
glycolate
C
serine
D
glycine
Answer
glycolate
Explanation
Solution
Photorespiration is a type of respiration which occurs in green cells in presence of light. It involves three organelles - chloroplast, peroxisomes and mitochondria. Respiratory substrate in photorespiration is a 2-carbon compound glycolic acid (2C), hence called C, cycle. RuBP-carboxylase in normal O/CO conc, acts as 'carboxylase'. It is the key enzyme of photosynthesis in C plants.