Question:
Which of the following statement is not true for chloroplast
Which of the following statement is not true for chloroplast
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Chloroplasts are semi-autonomous—they contain DNA, RNA, ribosomes, and can make proteins.
Updated On: Jul 2, 2026
- It contains DNA as its genetic material
- It produces ATP
- It has an electron transport chain
- It contains transcriptional but no translational apparatus
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The Correct Option is D
Approach Solution - 1
Chloroplasts contain both transcriptional and translational machinery, enabling them to synthesize some of their own proteins. So, statement 4 is incorrect.
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Approach Solution -2
Endosymbiotic theory reasoning:
Chloroplasts are believed to have originated from free-living photosynthetic cyanobacteria that were engulfed by a eukaryotic host. As a legacy of this ancestry, chloroplasts retain their own circular DNA, their own RNA polymerase for transcription, and, crucially, their own 70S ribosomes and associated factors that carry out translation of chloroplast-encoded proteins, for example subunits of Rubisco and photosystem components. They also perform photophosphorylation, ATP synthesis, using an electron transport chain in the thylakoid membrane. Since chloroplasts possess both a transcriptional and a translational apparatus, the claim that they lack a translational apparatus is false, making statement 4 the incorrect one and hence the answer.
Chloroplasts are believed to have originated from free-living photosynthetic cyanobacteria that were engulfed by a eukaryotic host. As a legacy of this ancestry, chloroplasts retain their own circular DNA, their own RNA polymerase for transcription, and, crucially, their own 70S ribosomes and associated factors that carry out translation of chloroplast-encoded proteins, for example subunits of Rubisco and photosystem components. They also perform photophosphorylation, ATP synthesis, using an electron transport chain in the thylakoid membrane. Since chloroplasts possess both a transcriptional and a translational apparatus, the claim that they lack a translational apparatus is false, making statement 4 the incorrect one and hence the answer.
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