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5 Written questions

5 Matching questions

  1. messenger RNA (mRNA)
  2. anti-
  3. poly-A tail
  4. P site
  5. transfer RNA (tRNA)
  1. a An RNA molecule that functions as an interpreter between nucleic acid and protein language by picking up specific amino acids and recognizing the appropriate codons in the mRNA.
  2. b A type of RNA, synthesized from DNA, that attaches to ribosomes in the cytoplasm and specifies the primary structure of a protein.
  3. c opposite ex: anticodon
  4. d The modified end of the 3' end of an mRNA molecule consisting of the addition of some 50 to 250 adenine nucleotides.
  5. e One of a ribosome's three binding sites for tRNA during translation. Holds the tRNA carrying the growing polypeptide chain. (P stands for peptidyl tRNA

5 Multiple choice questions

  1. A change in a gene at a single nucleotide pair
  2. One of a ribosome's three binding sites for tRNA during translation. The place where discharged tRNAs leave the ribosome.
  3. many
  4. The premise that a gene is a segment of DNA that codes for one polypeptide.
  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. RNA processingThe removal of noncoding portions (introns) of the RNA molecule after initial synthesis.

          

  2. deletion1) 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. base-pair substitutionA type of point mutation; the replacement of one nucleotide and its partner in the complementary DNA strand by another pair of nucleotides.

          

  4. A siteOne of a ribosome's three binding sites for tRNA during translation. The place where discharged tRNAs leave the ribosome.

          

  5. 5' capThe end of a pre-mRNA molecule modified by the addition of a cap