Courses

DNA Structure - Test 1


1. Which of the following must happen first in order for DNA replication to occur?

  DNA polymerase binds to the leading strand
  DNA is unwound
  Hydrogen bonds form between bases
  chromosomes condense


2. A nucleotide consists of:

  a nitrogen base
  a nitrogen base and a sugar
  a nitrogen base, sugar, and phosphate
  two nitrogen bases, a sugar, and a phosphate


3. The element that transformed the bacteria in Griffith's experiments was:

  protein
  capsules
  DNA
  heat


4. The Hershey-Chase research showed that:

  bacteria could be transformed
  DNA was the molecule of heredity
  DNA was in the shape of a double helix
  bases paired in a predictable way (A's to T's and G's to C's)


5. The rungs of the DNA ladder are made of:

  phosphates and bases
  sugars
  sugars and phosphates
  bases


6. Before the Hershey-Chase experiment, many scientists believed that ____ carried the hereditary information.

  proteins
  phages
  helicase
  the plasma membrane


7. In order to transform to a virulent form of bacteria, non encapsulated bacteria must:

  divide
  be exposed to killed capsulated bacteria
  be exposed to radioactive phosphorous
  infect a host


8. Which of the following best describes the arrangement of the sides of the DNA molecule?

  twisted
  antiparallel
  bonded
  alternating


9. Translation begins:

  on the replication fork
  on the lagging strand
  at the start codon
  in the nucleus


10. Which of the following is found on RNA but not DNA?

  uracil
  deoxyribose
  phosphate
  adenine






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