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14 May, 08:17

If a biologist wanted to analyze the evolutionary relationship in a gene that is found in both eukaryotes and bacteria, which of the following would not be useful?

A) histone coding genes

B) transfer RNA coding genes

C) ribosomal RNA coding genes

D) hexokinase coding gene for glycolysis

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  1. 14 May, 10:21
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    A) histone coding genes

    Explanation:

    Histones are the proteins involved in the packing of DNA in eukaryotes. They are positively charged proteins and are not found in bacteria. To analyze the evolutionary relationship in a gene between eukaryotes and bacteria, one must choose the gene present in both of them. The tRNA, rRNA and hexokinase encoding genes are common to both bacteria and eukaryotes. Therefore, one of these genes may be chosen for the study. However, histone encoding genes are not present in the genomes of bacteria. Therefore, the study of the histone encoding gene would not be useful for the mentioned purpose.
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