Which of the following organelles does not have a membrane?

Nucleus

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Ribosome

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Mitochondria

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Chloroplast

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Solution

The correct option is B
Ribosome

Ribosomes are composed of RNA and proteins and are not surrounded by any membrane.

The nucleus, chloroplasts and mitochondria, all are surrounded by a double-layered membrane.

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All the bscteria have the following organelle a.Mesosome b. Chloroplast c.golgi bodies d. Mitochondria

Assertion Mitochondria and chloroplast are semi- autonomous organelles.
Reason They have their own genetic material which codes for their proteins.

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