#DNA STANDS FOR BIOLOGY CODE#

Certain mutations in a person’s genetic code can lead them to develop a variety of diseases or conditions.Īlternatively, a person can inherit a gene that may cause problems with their health. Sometimes, however, a person’s DNA sequence may change randomly. In all people, DNA degrades over time, causing people to age. Each time a cell divides and DNA is replicated, the telomere becomes shorter.

Scientists liken them to the plastic tips on shoelaces that stop them from becoming frayed.Īs a person gets older, this protective region steadily becomes smaller. They protect the ends of the chromosome from being damaged or fusing with other chromosomes. Telomeres are regions of repeated nucleotides at the end of chromosomes. For instance, the codon GUG codes for the amino acid valine. Each codon codes for a specific amino acid or building block of a protein. MRNA provides information on a particular amino acid via three-letter sections called codons. Translation: The mRNA translates into amino acids by transfer RNA (tRNA).Another difference is that RNA does not contain the base thymine (T). RNA is a copy of DNA, but it is normally single-stranded. Transcription: The DNA code duplicates into messenger RNA (mRNA).Protein creationįor genes to create a protein, there are two main steps, including: For example, fruit flies have 8 chromosomes, while pigeons have 80 chromosomes. Humans have 23 pairs of chromosomes or 46 chromosomes in total. These chromosomes form the familiar “X” shape.Įach chromosome contains one DNA molecule. In this coiled state, it is DNA is called chromatin.Ĭhromatin condenses further through a supercoiling process and packages into structures called chromosomes. Strands of DNA loop, coil, and wrap around proteins called histones. Most DNA lives in the nuclei of cells and some exist in mitochondria, which are the powerhouses of the cells.īecause humans have so much DNA and the nuclei are so small, DNA needs to be packaged incredibly neatly.

Dna stands for biology