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5 Written questions

5 Matching questions

  1. terminator
  2. mutation
  3. E site
  4. intro-
  5. A site
  1. a A rare change in the DNA of a gene, ultimately creating genetic diversity.
  2. b One of a ribosome's three binding sites for tRNA during translation. Holds the tRNA carrying the next amino acid to be added to the polypeptide chain.
  3. c within ex: intron
  4. d One of a ribosome's three binding sites for tRNA during translation. The place where discharged tRNAs leave the ribosome.
  5. e In prokaryotes, a special sequence of nucleotides in DNA that marks the end of a gene. It signals RNA polymerase to release the newly made RNA molecule, which then departs from the gene.

5 Multiple choice questions

  1. A complex assembly that interacts with the ends of an RNA intron in splicing RNA, releasing the intron and joining the two adjacent exons.
  2. The modified end of the 3' end of an mRNA molecule consisting of the addition of some 50 to 250 adenine nucleotides.
  3. An initial RNA transcript; also called pre-mRNA when transcribed from a protein-coding gene
  4. The end of a pre-mRNA molecule modified by the addition of a cap
  5. A noncoding, intervening sequence within a eukaryotic gene.

5 True/False questions

  1. one gene-one polypeptide hypothesisAn enzyme that links together the growing chain of ribonucleotides during transcription.


  2. ribozymeAn enzymatic RNA molecule that catalyzes reactions during RNA splicing.


  3. -scriptwrite ex: transcription


  4. nonsense mutationThe most common type of mutation, a base-pair substitution in which the new codon makes sense in that it still codes for an amino acid.


  5. translationThe synthesis of RNA on a DNA template.


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