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5 Written questions

5 Matching questions

  1. anti-
  2. nonsense mutation
  3. intron
  4. frameshift mutation
  5. TATA box
  1. a A promoter DNA sequence crucial in forming the transcription initiation complex.
  2. b opposite ex: anticodon
  3. c A noncoding, intervening sequence within a eukaryotic gene.
  4. d A mutation occurring when the number of nucleotides inserted or deleted is not a multiple of three, resulting in the improper grouping of the following nucleotides into codons.
  5. e A mutation that changes an amino acid codon to one of the three stop codons, resulting in a shorter and usually nonfunctional protein

5 Multiple choice questions

  1. within ex: intron
  2. 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.
  3. A type of RNA, synthesized from DNA, that attaches to ribosomes in the cytoplasm and specifies the primary structure of a protein.
  4. One of a ribosome's three binding sites for tRNA during translation. The place where discharged tRNAs leave the ribosome.
  5. The 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 True/False questions

  1. promoterOne of a ribosome's three binding sites for tRNA during translation. Holds the tRNA carrying the growing polypeptide chain. (P stands for peptidyl tRNA


  2. RNA processingThe removal of noncoding portions (introns) of the RNA molecule after initial synthesis.


  3. ribosomeAn enzymatic RNA molecule that catalyzes reactions during RNA splicing.


  4. ribozymeA 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.


  5. poly-A three-nucleotide sequence of DNA or mRNA that specifies a particular amino acid or termination signal; the basic unit of the genetic code.