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Twelfth Grade (Grade 12) DNA, RNA, and Genetics Questions

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Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
The major function of DNA ligase is                                     .
  1. cut DNA strand open at specific site
  2. help protein to bind DNA tightly
  3. transcribe DNA into RNA
  4. link two DNA strands from 3' to 5'
Grade 12 DNA, RNA, and Genetics
The structure of DNA is called a                 .
  1. A Semi-Circle
  2. A Lipid Membrane
  3. A Double Helix
  4. Equilibrium
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
DNA ligase plays an essential role in biotechnology because                                                  .
  1. it helps foreign DNA to integrate into native DNA
  2. it clears off alien DNA to keep the sample pure
  3. it prevents the DNA from being digested
  4. it is extremely thermostable and effective
Grade 12 DNA, RNA, and Genetics
A man with type A blood has a child with a woman who has type B blood. The child has type O blood. What can be determined about the blood types of any future children this couple may have?
  1. All future children will also have type O blood.
  2. There is a 10% chance that most future children will be type AB.
  3. The future children have an equal chance of having all of the four possible blood types.
  4. The only blood type that is possible for the future children to have is type B.
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Which of these bases is present in DNA but not RNA?
  1. Cytosine
  2. Uracil
  3. Guanine
  4. Thymine
  5. Adenine
Grade 12 DNA, RNA, and Genetics
Alleles for the A and B blood cell antigens are codominant. The condition where no antigens are present on the blood cells (type O blood) is a recessive trait. Which set of parents can most likely produce a child with type O blood?
  1. one parent with type AB blood, and the other parent with type A blood
  2. one parent with type AB blood and the other parent with type O blood
  3. one parent with heterozygous type A blood, and the other parent with type O blood
  4. one parent with homozygous type A blood, and the other parent with homozygous type B blood
Grade 12 DNA, RNA, and Genetics
Hemophilia is a sex-linked, recessive trait. Which of the following describes the probability of hemophilia in the offspring of a man who does not have hemophilia and a woman whose father is a hemophiliac?
  1. Each of their sons will have hemophilia.
  2. None of their daughters will have hemophilia.
  3. Their sons have a 25% chance of having hemophilia.
  4. There is a 50% chance that their daughters will have hemophilia.
Grade 12 DNA, RNA, and Genetics
What is the purpose of Hox genes?
  1. control the differentiation of cells and tissues in the embryo
  2. turn off bad genes to make sure they are not expressed
  3. control codons produced by double checking mRNA
  4. all of the above
Grade 12 DNA, RNA, and Genetics
To make restriction fragments, a DNA sample is treated with                    .
  1. restriction enzymes
  2. gel electrophoresis
  3. DNA polymerase
  4. DNA ligase
  5. PCR
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