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Ninth Grade (Grade 9) DNA, RNA, and Genetics Questions

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Grade 9 DNA, RNA, and Genetics
The region of a chromosome where two sister chromatids are held together is the
  1. spindle.
  2. nucleosome.
  3. centromere.
  4. centriole.
Grade 9 DNA, RNA, and Genetics
Okazaki fragments occur only in the leading strand.
  1. True
  2. False
Grade 9 DNA, RNA, and Genetics
The allele coding for a cleft chin is dominant over the allele coding for no cleft. If neither Ace Ventura or his wife have a cleft in their chin, what will their child have?
  1. no cleft chin
  2. a cleft chin
  3. either no cleft or a cleft chin, randomly
  4. a high likelihood of having a cleft chin
Grade 9 DNA, RNA, and Genetics
Which fact is NOT true about Huntington's disorder?
  1. It is curable.
  2. If you don't have it, none of your kids have it.
  3. A genetic test at any age can tell you if you have it.
  4. If you have it, your children have a 50% chance of having it.
Grade 9 DNA, RNA, and Genetics
Which is NOT one of the three roles of DNA?
  1. store info
  2. reduce info
  3. copy info
  4. transmit info
Grade 9 DNA, RNA, and Genetics
Which is not part of the lac operon?
  1. repressor
  2. activator protein
  3. operator
  4. promotor
Grade 9 DNA, RNA, and Genetics
About how many white blood cells does RFLP require?
  1. 10-3,000
  2. 50-4,000
  3. 80-5,000
  4. 5,000-50,000
Grade 9 DNA, RNA, and Genetics
When a chromosome undergoes a deletion mutation, information is                .
  1. transfered
  2. lost
  3. reversed
  4. repeated
Grade 9 DNA, RNA, and Genetics
How do mutations occur during DNA replication?
  1. It is a complicated process and naturally base pairs may get changed
  2. Too many enzymes are involved
  3. DNA replicates randomly, with no base pairing
  4. Proteins are not expressed
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