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5 Written questions

5 Matching questions

  1. ribozyme
  2. RNA polymerase
  3. signal-recognition particle (SRP)
  4. promoter
  5. anticodon
  1. a An enzyme that links together the growing chain of ribonucleotides during transcription.
  2. b An enzymatic RNA molecule that catalyzes reactions during RNA splicing.
  3. c A specialized base triplet at one end of a tRNA molecule that recognizes a particular complementary codon on an mRNA molecule.
  4. d A specific nucleotide sequence in DNA that binds RNA polymerase and indicates where to start transcribing RNA
  5. e A protein-RNA complex that recognizes a signal peptide as it emerges from the ribosome.

5 Multiple choice questions

  1. within ex: intron
  2. The premise that a gene is a segment of DNA that codes for one polypeptide.
  3. 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.
  4. write ex: transcription
  5. 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 True/False questions

  1. missense mutationA mutation that changes an amino acid codon to one of the three stop codons, resulting in a shorter and usually nonfunctional protein


  2. ribosomeA 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. codonA coding region of a eukaryotic gene or expressed region


  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. messenger RNA (mRNA)A type of RNA, synthesized from DNA, that attaches to ribosomes in the cytoplasm and specifies the primary structure of a protein.