Practice Quiz

MTEL Biology Practice Exam - Question List

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66.
Upon reaching a ribosome, a tRNA molecule will:
  1. Match an anticodon to the complementary mRNA codon.
  2. Attach an amino acid to the growing polypeptide chain.
  3. Eliminate introns from the mRNA sequence.
  4. Terminate the growing polypeptide chain.
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67.
Which of the following best describes an operator in prokaryotic gene expression?
  1. It is a specific nucleotide sequence that indicates where DNA replication begins.
  2. It controls access of RNA polymerase to the genes in a transcription unit.
  3. It is a transposable genetic element that activates an operon.
  4. It controls access of RNA polymerase to the genes in a transcription unit.
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68.
One consequence of the redundancy of the genetic code is that: 
  1. Somatic mutations do not affect the germ line.
  2. Nucleotide base deletions may lead to frameshift mutations.
  3. Some point mutations have no effect on phenotypic expression.
  4. Missense mutations may result in translocations.
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69.
Which of the following techniques is used to increase the quantity of DNA in a sample to be analyzed?
  1. DNA sequencing.
  2. Polymerase chain reaction.
  3. Restriction fragment analysis.
  4. DNA hybridization.
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70.
Researchers trying to date speciation events in the past for which fossils are not available sometimes rely on evidence that assumes the:
  1. Occurrence of convergent evolution.
  2. Validity of the Hardy-Weinberg equilibrium.
  3. Existence of a molecular clock.
  4. Applicability of the biological species concept.
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