INTRODUCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cells must contain DNA
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all living things are made from cells
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cells can only come from other cells
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cells are the basic unit of life
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Detailed explanation-1: -Rudolf Virchow modified the cell theory and added “Omnis cellula-e cellula", which means that all cells arise from pre-existing cells. Though cells require water for its composition and survival, it is not a part of cell theory.
Detailed explanation-2: -it is accepted that cells contain DNA in chromosomes and RNA in the nucleus and cytoplasm, but only in the modern cell theory. the classical cell theory does not include this. but using either classical or modern theory, it is false that all cells have DNA surrounded by a nucleus.
Detailed explanation-3: -All living things have DNA within their cells. In fact, nearly every cell in a multicellular organism possesses the full set of DNA required for that organism. However, DNA does more than specify the structure and function of living things-it also serves as the primary unit of heredity in organisms of all types.
Detailed explanation-4: -Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).