Answer: 2738. Comparison tests Use the Comparison Test or

BIOS 2250 – Chapter 9 notes  DNA stores genetic information. DNA is stored within the nucleus permanently.  RNA is a single strand copy of DNA containing slightly different features. RNA has a ribose sugar instead of the deoxyribose sugar in DNA. RNA contains a base called uracil instead of thymine.  RNA controls the gene expression while DNA stores the genetic information.  DNA and RNA are nucleic acids composed of nucleotides. Each nucleotide is composed of a sugar, base, and phosphate.  DNA stands for deoxyribonucleic acid.  RNA stands for ribonucleic acid.  Proteins are long chains of amino acids and are the products of genes.  Changes in the DNA may change the protein functions. This means that when a gene is altered or destroyed, the function of the protein is altered or destroyed.  Proteins can have a variety of shapes and functions. Since a protein is just folded chains of amino acids, the shape of a protein is specified by its amino acid sequence.  Protein synthesis is a series of chemical reactions where chemical bonds are formed and broken. This is done in two steps. Transcription processes DNA into mRNA. Translation processes mRNA into proteins.  There are three types of RNA. Messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). BIOS 2250 – Chapter 9 notes  Transcription of RNA occurs in three different stages. These stages are Initiation, elongation, and termination. The product of transcription creates pre-mRNA.  Large pre-mRNA molecules are composed of exons and introns.  Exons are nucleotide sequences that are transcribed and translated.  Introns are nucleotide sequences that are transcribed but not translated. The introns are snipped out to create the mRNA.