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5 Written questions

5 Matching questions

  1. poly-A tail
  2. deletion
  3. transcription
  4. codon
  5. nonsense mutation
  1. a 1) A deficiency in a chromosome resulting from the loss of a fragment through breakage. (2) A mutational loss of one or more nucleotide pairs from a gene.
  2. b The modified end of the 3' end of an mRNA molecule consisting of the addition of some 50 to 250 adenine nucleotides.
  3. c The synthesis of RNA on a DNA template.
  4. d A mutation that changes an amino acid codon to one of the three stop codons, resulting in a shorter and usually nonfunctional protein
  5. e A three-nucleotide sequence of DNA or mRNA that specifies a particular amino acid or termination signal; the basic unit of the genetic code.

5 Multiple choice questions

  1. One of a ribosome's three binding sites for tRNA during translation. The place where discharged tRNAs leave the ribosome.
  2. A cell organelle constructed in the nucleolus and functioning as the site of protein synthesis in the cytoplasm; consists of rRNA and protein molecules, which make up two subunits.
  3. A rare change in the DNA of a gene, ultimately creating genetic diversity.
  4. The synthesis of a polypeptide using the genetic information encoded in an mRNA molecule. There is a change of languagefrom nucleotides to amino acids
  5. A chemical or physical agent that interacts with DNA and causes a mutation.

5 True/False questions

  1. frameshift mutationA change in a gene at a single nucleotide pair


  2. trans-opposite ex: anticodon


  3. primary transcriptAn initial RNA transcript; also called pre-mRNA when transcribed from a protein-coding gene


  4. TATA boxA rare change in the DNA of a gene, ultimately creating genetic diversity.


  5. RNA processingModification of RNA before it leaves the nucleus, a process unique to eukaryotes.