Report Abuse. I never recommend anyone hitting themselves in the head, but I can explain why they do it. They have a bunch of negative thoughts running through their minds and hitting themselves in the head sometimes interrupts that pattern for a few moments.In fact eft uses light taps on the forehead to break a pattern of negative thinking. The second reason is when people are that angry they cannot think straight.hey have a bunch of negative thoughts running through their minds and hitting themselves in the head sometimes interrupts that pattern for a few moments. In fact eft uses light taps on the forehead to break a pattern of negative thinking. The second reason is when people are that angry they cannot think straight.
Altering nucleotide sequences most often results in nonfunctioning proteins. Mutations cause changes in the genetic code that lead to genetic variation and the potential to develop disease. Gene mutations can be generally categorized into two types: point mutations and base-pair insertions or deletions.Point mutations are the most common type of gene mutation. Also called a base-pair substitution, this type of mutation changes a single nucleotide base pair. Silent Mutation: Although a change in the DNA sequence occurs, this type of mutation does not change the protein that is to be produced. 2  This is because multiple genetic codons can encode for the same amino acid. 3  Amino acids are coded for by three nucleotide sets called codons.
DNA Mutation and Repair. A mutation, which may arise during replication and/or recombination, is a permanent change in the nucleotide sequence of DNA. Damaged DNA can be mutated either by substitution, deletion or insertion of base pairs.Mutations, for the most part, are harmless except when they lead to cell death or tumor formation.ypes of Mutations. There are three types of DNA Mutations: base substitutions, deletions and insertions. 1. Base Substitutions. Transition: this occurs when a purine is substituted with another purine or when a pyrimidine is substituted with another pyrimidine.