Which of the following is correct about cell theory in view of the current extent of our knowledge regarding cell structure?
Correct answer: B. Cell theory does not hold good because all living beings (e.g. viruses) do not have cellular organisation.
- A. Modified cell theory means that all living beings are composed of cells capable of reproducing.
- B. Cell theory does not hold good because all living beings (e.g. viruses) do not have cellular organisation.
- C. Cell theory means that all living objects consists of cells whether or not they are capable of reproducing.
Explanation
This statement is partly correct regarding viruses as an exception to cell theory due to their acellular nature. However, Paramecium, Rhizopus, and Vaucheria are all multicellular organisms and are not exceptions to cell theory. They consist of cells and adhere to the principles of cell theory.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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