PATHOLOGY MCQ
CELL DAMAGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the code of each species shows slight changes in some codons
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the genome of every living cell is identical to that of a distant relative
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all organisms use the same code for translating proteins
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only closely related species use the same nitrogen bases
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Detailed explanation-1: -These shared genes preserve a record of an ancestor that they share with each other, but not with bacteria. Because genes change over time, the more similar the DNA of two organisms, the more recently they share a common ancestor. Observations from anatomy, fossils, and embryological development are all rooted in DNA.
Detailed explanation-2: -Evidence of Evolution: Universal Genetic Code All organisms use DNA to store genetic information (with the exception of some viruses). They all use the same four bases (G, A, C, and T-or U if you’re talking about RNA) and make the same amino acids. This is why DNA provides us with the universal genetic code.
Detailed explanation-3: -42. What characteristic of the genetic code points to a common ancestry for all organisms? The code contains 64 codons. The genetic code is almost universal.
Detailed explanation-4: -The genetic code is universal. All known living organisms use the same genetic code. This shows that all organisms share a common evolutionary history. The genetic code is unambiguous.