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DNA and RNA

chapter 6

TermDefinition
central dogma of molecular biology doctrine that genetic instructions in DNA are copied by RNA, which carries them to a ribosome where they are used to synthesize a protein (DNA → RNA → protein)
Chargaff’s rules observations by Erwin Chargaff that concentrations of the four nucleotide bases differ among species; and that, within a species, the concentrations of adenine and thymine are always about the same and the concentrations of cytosine and guanine are alwa
messenger RNA (mRNA) type of RNA that copies genetic instructions from DNA in the nucleus and carries them to the cytoplasm
ribosomal RNA (rRNA) type of RNA that helps form ribosomes and assemble proteins
transfer RNA (tRNA) type of RNA that brings amino acids to ribosomes where they are joined together to form proteins
codon group of three nitrogen bases in nucleic acids that makes up a code “word” of the genetic code and stands for an amino acid, start, or stop
genetic code universal code of three-base codons that encodes the genetic instructions for the amino acid sequence of proteins
promoter region of a gene where a RNA polymerase binds to initiate transcription of the gene
protein synthesis process in which cells make proteins that includes transcription of DNA and translation of mRNA
transcription process in which plants give off water vapor from photosynthesis through tiny pores, called stomata, in their leaves
translation process in which genetic instructions in mRNA are “read” to synthesize a protein
chromosomal alteration mutation that changes chromosome structure
frameshift mutation deletion or insertion of one or more nucleotides that changes the reading frame of the genetic material
genetic disorder disease caused by a mutation in one or a few genes
germline mutation mutation that occur in gametes
mutagen environmental factors that causes mutations
mutation change in the sequence of bases in DNA or RNA
point mutation change in a single nucleotide base in the genetic material
somatic mutation mutation that occurs in cells of the body other than gametes
Created by: user-1974183
 



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