The is a pattern of amino acid modifications of the histone tails that is thought to specify the transcriptional state of the genes. (hint: two words)

The histone code is a pattern of amino acid modifications of the histone tails that is thought to specify the transcriptional state of the genes.

Different chemical modifications, like acetylation, methylation, or phosphorylation, are made to residues on the N-terminal tails of histone proteins and those modifications correlate with chromatin structure and gene expression levels.

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.