Question

The structure known as peroxisome is associated with which of the following functions?
A. Photosynthesis
B. Respiration
C. Photorespiration
D. Photophosphorylation

Answer 1

Hint: Here, we have to find the function of peroxisomes in the cell. To answer the question, try to correlate the given function with the peroxisomes.

Complete answer:
Here, we are given the peroxisome. It is a cellular organelle.
“Peroxisome is one of the membrane-bound organelles.” It was previously referred to as microbody and is generally found in a majority of the eukaryotic cells.
The name peroxisomes suggest that it has some function correlated to the oxidation. Thereby, it is also called oxidative organelles.
The oxygen present in the cell serves as a co-substrate that itself gets oxidized to the hydrogen peroxide and the other major substrate gets reduced to the hydrogen peroxide.
The peroxisome helps in photorespiration that is an oxidative photosynthetic carbon cycle.
It helps to reduce the wasteful metabolites produced during photosynthesis by the enzyme RUBISCO. The free oxygen radicals that are generated become toxic to the cell and can also lead to the bleaching of the cell thereby the peroxisomes play an important role in eliminating the free radicals of any metabolite.

Therefore, the correct option is C. Photorespiration.

Additional Information:
Photorespiration starts in the chloroplast but it also occurs in the peroxisomes.

Note: Remember the chloroplast is the initial organelle in which the photorespiration begins. So, we should not get confused with the photorespiration occurring only in the chloroplast. The photorespiration also occurs in the peroxisomes and mitochondria.