Question
Given below are two statements:
Statement I: Mitochondria and chloroplasts are both double membrane bound organelles.
Statement II: Inner membrane of mitochondria is relatively less permeable, as compared to that of a chloroplast.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
Solution
Sol. [Key Concept: Membranes of mitochondria and chloroplasts]
Statement I is true, and the official examination answer treats Statement II as false: option (1). Both organelles have two envelope membranes. NCERT states that the inner chloroplast membrane is relatively less permeable than its outer membrane; that passage does not establish a universal permeability ranking between chloroplast and mitochondrial inner membranes. Both inner membranes have selective transport systems. The original claim that the chloroplast inner membrane is completely impermeable to ions and metabolites is incorrect.
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