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Genetics Basics

Quiz by Heather Murphy

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80 questions
Show answers
  • Q1
    Which of these images shows deoxyribose?
    Question Image
    A
    B
    30s
  • Q2
    All of the following are DNA bases, EXCEPT:
    uracil.
    thymine.
    guanine.
    adenine.
    30s
  • Q3
    Cytosine and thymine are:
    neither purines nor pyrimidines.
    purines
    pyrimidines.
    30s
  • Q4
    How many carbon rings do purines have?
    1
    3
    2
    4
    30s
  • Q5
    How many carbon rings do pyrimidines have?
    3
    4
    2
    1
    30s
  • Q6
    What is the DNA base-pairing rule?
    Adenine always pairs with Guanine. Thymine always pairs with Cytosine.
    Adenine always pairs with Thymine. Guanine always pairs with Cytosine.
    Adenine always pairs with Uracil. Guanine always pairs with Cytosine.
    Adenine always pairs with Cytosine. Thymine always pairs with Guanine.
    30s
  • Q7
    What structure is the building block of DNA?
    Phosphate
    Deoxyribose
    Nucleosome
    Nucleotide
    30s
  • Q8
    What are the parts of a nucleotide?
    Two phosphate groups and a nitrogenous base
    Guanine, Cytosine, Adenine, and Thymine
    Pentose sugar, phosphate group, nitrogenous base
    Hexose sugar, phosphate group, nitrogenous base
    30s
  • Q9
    DNA has a sugar-phosphate backbone.
    True
    False
    30s
  • Q10
    How many hydrogen bonds are between cytosine and guanine in a DNA molecule?
    2
    3
    0
    1
    30s
  • Q11
    How many hydrogen bonds are between adenine and thymine in a DNA molecule?
    4
    3
    1
    2
    30s
  • Q12
    What structures make up the "rungs" or steps of a DNA ladder?
    Nitrogenous bases
    Nucleotides
    Phosphate groups
    Pentose sugar
    30s
  • Q13
    What is semiconservative replication?
    Replication of DNA in which each daughter double helix is comprised of two parental DNA strands
    Replication of DNA in which all materials are conserved and no new materials are added to the daughter strands.
    Replication of DNA in which each daughter double helix is comprised of two daughter DNA strands
    Replication of DNA in which each daughter double helix is comprised of one parental DNA strand and one daughter DNA strand
    30s
  • Q14
    In DNA replication, what is the function of DNA helicase?
    It bonds DNA nucleotides together.
    It synthesizes DNA continuously.
    It helps unwind the DNA double-helix.
    It keeps the separated DNA from rebinding.
    30s
  • Q15
    This is the enzyme that synthesizes a short RNA strand to get the synthesis of DNA started.
    Helicase
    RNA Primer
    Polymerase
    Primase
    30s

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