Plant Structure
Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria?

Both have their own ribosomes
Both strongly resemble prokaryotes, especially in size
Both have their own DNA
Both can live and function independently of the cell

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Plant Structure
Which of the following statements about mitochondrial proteins is true?

Some mitochondrial proteins are coded for and synthesized in the mitochondria and others
All mitochondrial proteins are imported from the cytoplasm
All mitochondrial proteins are coded for and synthesized in the mitochondria
Mitochondrial proteins arise from other mitochondrial proteins

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Plant Structure
The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that

mitochondria are surrounded by a semi permeable membrane
mitochondria were derived from a symbiotic bacterium
the mitochondrial matrix is hypotonic to the cellular cytoplasm
the mitochondrial matrix is hypertonic to the cellular cytoplasm

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