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Select the wrong statement from the following.
A
Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane
B
Both chloroplasts and mitochondria contain DNA
C
The chloroplasts are generally much larger than mitochondria
D
Both chloroplasts and mitochondria contain an inner and an outer membrane
Detailed Solution
Thylakoids are flattened membranous sacs found only in chloroplasts. They are arranged in stacks called grana, and the space enclosed by the thylakoid membrane is the thylakoid space or lumen.
Mitochondria do not have thylakoids. Their inner membrane is folded into cristae, and the inner compartment is called the matrix.
So the statement that both chloroplasts and mitochondria have a thylakoid space bounded by the thylakoid membrane is wrong.
Both organelles are double membrane-bound, with an outer and an inner membrane.
Both contain their own circular DNA, RNA and 70S ribosomes, and are semi-autonomous.
Chloroplasts (5-10 micrometres long) are generally much larger than mitochondria (about 1-4 micrometres long).
The other three statements are therefore correct.