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  1. In plant cells, peroxisomes are associated with
    1. photorespiration
    2. phototropism
    3. photoperiodism
    4. photosynthesis
Correct Option: A

In plant peroxisomes are associated with photorespiration. Peroxisomes are ubiquitous organelles in eukaryotes that function to rid the cell of toxic substances. They have a single membrane that separates their contents from the cytosol (the internal fluid of the cell) and that contains membrane proteins critical for various functions, such as importing proteins into the organelles and aiding in proliferation. Unlike lysosomes, which are formed in the secretory pathway, peroxisomes usually selfreplicate by enlarging and then dividing, although there is some indication that new ones may be formed directly. Peroxisomes were discovered by the Belgian cytologist Christian de Duve in 1965.



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