During photorespiration, the oxygen consuming reaction(s) occur in:
- stroma of chloroplasts and mitochondria
- stroma of chloroplasts and peroxisomes
- grana of chloroplasts and peroxisomes
- stroma of chloroplasts
The Correct Option is B
Solution and Explanation
Photorespiration primarily takes place in the chloroplasts and peroxisomes of plant cells. In the chloroplasts, it involves the oxygenase activity of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO), and in the peroxisomes, the glycolate pathway is involved in processing the products of oxygenation.
So, the correct option is (B): stroma of chloroplasts and peroxisomes
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Concepts Used:
Biodiversity and Conservation
The term ‘biodiversity’ is derived from the two words- ‘bios' which means life and ‘diversity’ i.e, differentiation or variation. Edward Wilson, the sociobiologist was the first to popularise the term ‘biodiversity’ in the year 1992. The term implies the occurrence of various plants and animals along with their variants such as biotypes, ecotypes and genes on earth. In our biosphere, the immense diversity or heterogeneity remains not only at the species level but also, at every level of biological organization that ranges from macromolecules in the cells to biomes.
Biodiversity and Conservation is a topic covered under the fifteenth chapter and Unit 5 of NCERT class 12 biology.