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What sugar is in DNA? deoxyribose What sugar is in RNA? ribose How many main types of RNA are there? 3 X-Rays, UV light, and radioactive substances that can cause mutations are called __. mutagens In most organisms, the start of translation is signaled by an AUG codon and which amino acid? methionine DNA and RNA are made of subunits called __. nucleotides What is produced during transcription? mRNA Each set of 3 nitrogen bases in mRNA representing an amino acid is referred to as a __. codon The three bases on the tRNA molecule that are complimentary to one of the mRNA codons are called the anticodon rRNA makes up __. ribosomes Adenine is to thymine as guanine is to __. cytosine DNA is copied during a process called replication If a DNA strand is made up of 20% thymine, how much of the strand would be made of guanine? 30% What are three differences in DNA and RNA? different sugar, Different base, single or double stranded What causes translation to stop? Stop codon What are three differences in DNA and RNA? different sugar, Different base, single or double stranded Where is DNA located in the cell? nucleus In RNA, adenine bonds with __. uracil Genes contain instructions for assembling __. proteins What are three differences in DNA and RNA? different sugar, Different base, single or double stranded