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Unit 5: Test Review

Quiz by Amanda Wood

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17 questions
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  • Q1
    The figure below shows two homologous chromosomes undergoing a type of mutation called translocation. Each letter in the figure represents a single gene. This mutation is most likely to cause negative effects by —
    Question Image
    reversing DNA nucleotides
    destroying genetic information
    adding new chromosomes
    expressing genes differently
  • Q2
    Which mutation would change the greatest number of amino acids in a protein?
    the substitution of a thymine nucleotide with a cytosine nucleotide near the beginning of a gene
    the addition of the nucleotides that make up an additional stop codon to the end of a gene
    the deletion of a single adenine nucleotide in the middle of a gene
    the insertion of a thymine, a guanine, and an adenine nucleotide in that order at the start of a gene
  • Q3
    Mutations within the DNA sequence of an organism can —
    all of the above
    result in alterations that are harmful to an organism
    result in alterations that do not effect the organism
    result in alterations that are helpful to an organism
  • Q4
    A codon chart is shown below.Which of these changes to the DNA triplet 3’ GCT 5’ will affect the protein produced?
    Question Image
  • Q5
    A segment of DNA produces methionine, threonine, histidine, aspartate, and glycine when translated. A substitution mutation occurs and causes the synthesis of the segment as shown. Which is the new peptide chain when the new DNA segment is translated?
    Question Image
    Methionine, serine, histidine, aspartate, glycine
    Methionine, leucine, histidine, aspartate, glycine
    Methionine, proline, histidine, aspartate, glycine
    Methionine, phenylalanine, histidine, aspartate, glycine
  • Q6
    A model of a DNA molecule is shown below. The arrow indicates —
    Question Image
    the junction of introns and exons in the sense strand of DNA
    the hydrogen bond between complementary nucleotides
    the bond between adjacent phosphate and deoxyribose molecules
    the junction of a codon and a DNA triplet
  • Q7
    How does DNA in cells determine an organism’s complex traits?
    DNA produces the energy an organism needs in order to grow.
    DNA separates into long single strands that make up each part of an organism.
    DNA contains codes for proteins, which are necessary for the growth and functioning of an organism.
    DNA folds into the nucleus of each of the cells of an organism.
  • Q8
    The sequence of nitrogenous bases in DNA varies widely. The sequence of the bases in DNA is most important for which of the following?
    Helping form the sugar-phosphate backbone of DNA molecules
    Allowing the DNA to have the shape necessary for replication
    Providing the instructions for the traits of an organism
    Preventing mutations from occurring during DNA replication
  • Q9
    A segment of DNA is represented in the illustration. How is information for a specific protein carried on the DNA molecule?
    Question Image
    As a sequence of nucleotides
    In the ratio of adenines to thymines
    In the double-helix shape of the condensed chromosome
    As a pattern of phosphates and sugars
  • Q10
    The process represented in the diagram produces a molecule that is complementary to thetemplate strand of DNA. What type of molecule is produced?
    Question Image
    Messenger RNA
    New DNA
  • Q11
    Part of an important cellular process involving a DNA strand is modeled below.What is the purpose of this cellular process?
    Question Image
    Preserving genetic information for future generations
    Transcribing information in the DNA sequence for use by the cell
    Deleting the information in the sequence produced from the DNA template
    Producing more nucleotides for the DNA sequence
  • Q12
    A model of a biological process is shown. What is the purpose of this process?
    Question Image
    To synthesize amino acids used to unzip strands of DNA and copy the genetic code
    To assemble nucleotides in an mRNA chain along a DNA template
    To replicate the DNA of an organism before cell division
    To translate the genetic code into a specific sequence of amino acids
  • Q13
    In the process of translation, the ribosome is the site where —
    DNA strands are separated and copied
    information from DNA is copied to RNA
    free floating amino acids are picked up by tRNA
    amino acid chains are assembled from information in the mRNA
  • Q14
    Study the sentences describing the steps of protein synthesis. Which sequence places the steps in the correct order? 1. Transfer RNA picks up individual amino acids and carries them to the ribosome. 2. Ribosomal RNA bonds mRNA and tRNA. 3. A single strand of DNA serves as a template for making mRNA. 4. Messenger RNA carries the sequence of nucleotides to the ribosomes. 5. A protein is synthesized.
  • Q15
    Which type of ribonucleic acid carries the coding information to the site of protein synthesis?

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