Random mutations only very rarely result in changes in a protein that improve its usefulness for the cell, yet useful mutations are selected in evolution. Because these changes are so rare, for each useful mutation there are innumerable mutations that lead to either no improvement or inactive proteins. Why, then, do cells not contain millions of proteins that are of no use?

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A:

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Q: Beadle and Tatum proposed the one gene-one enzyme concept - This hypothesis can now be restated in…

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Q: The Central Dogma in Molecular Biology starts with genes being specified in the DNA determining the…

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Q: Why the process of DNA is transcribed into mRNA and then translated into protein is referred to as…

A: Note - we are supposed to answer 1 question according to the guidelines. Please repost the other…

Q: Gene alteration due to mutagen may cause adverse effect on our life. However, not all mutations can…

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Q: For you, what is the contribution around 18-1900 of golden era in biochemistry? Explain

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Q: Glycine is a highly conserved amino acid residue in the evolution of proteins. Why?

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Q: Which of the following is most likely to have a small protein called ubiquitin attached to it?

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Q: Some substitution mutation result in a malfunctioning protein but others do not. Why is this? 

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.