DNAReplication.tk

DNA Replication
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DNA Replication and Repair
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Enzymes of DNA Replication
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Quiz on DNA Replication
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DNA Replication Quiz

Instructions: Click the answer button to see the correct answer.

  1. DNA replication occurs in the
    1. Nucleus
    2. Extracellular fluid
    3. On the ribosome surface
    4. Cytoplasm

  2. After replication, the daughter DNA molecules
    1. One strand contains only parental nucleotides and the other is assembled newly
    2. The two strands contain nucleotides randomly assembled.
    3. Have all their nucleotides from the parent DNA
    4. Each strand contains a mixture of parental and newly assembled nucleotides.

  3. In DNA replication the new chain grows in a
    1. 5' to 3' direction
    2. 3' to 5' direction
    3. Depends on Okazaki fragments
    4. Any direction

  4. The enzyme that breaks the hydrogen bonds between the two DNA strands is called
    1. Helicase
    2. RNA polymerase
    3. Ligase
    4. DNA polymerase

  5. The Okazaki fragments are connected by
    1. Helicase
    2. Ligase
    3. RNA polymerase
    4. DNA polymerase

  6. Okazaki fragments are used to elongate
    1. the lagging strand toward the replication fork
    2. the lagging strand away from the replication fork
    3. both strands in both directions
    4. the leading strand toward the replication fork
    5. the leading strand away from the replication fork

  7. In DNA adenine always pairs with
    1. guanine
    2. thymine
    3. uracil
    4. cytosine
    5. adenine

  8. DNA replication is called semiconservative because _________ of the original duplex appears in the duplex formed in replication.
      >none
    1. most
    2. all
    3. half

  9. Each unit of a nucleic acid consisting of a sugar, attached phosphate group, and base is a
    1. genetisome
    2. histone
    3. nucleosome
    4. nucleotide
    5. nucleolus

  10. A DNA molecule has the same amount of adenine and thymine.
    1. True
    2. False

  11. Which statement about the elongation of the lagging strand during DNA replication is correct?
    1. It progresses (grows) toward the replication fork.
    2. It is synthesized continuously.
    3. It is synthesized by DNA ligase.
    4. It requires a short RNA primer to proceed.

  12. If one side of a DNA molecule contains the following sequence of nucleotides, AGTCCG, the complementary sequence on the other side would be:
    1. GCCTGA
    2. CTGAAT
    3. none of the above
    4. TCAGGC
    5. AGTCCG

  13. The two sides of the double helix structure of DNA are held together with hydrogen bonds.
    1. True
    2. False

  14. A repeating DNA sequence at the end of chromosomes that prevents them from losing base pair sequences at their ends and from fusing together is called :
    1. None of the above
    2. Telomerase
    3. Replicon
    4. Telomere

  15. During which stage of the mitotic cell cycle is DNA replicated?
    1. Prophase
    2. Metaphase
    3. Telophase
    4. Interphase
    5. Cytokinasis

  16. Adenine comprised 36% of the nitrogenous bases in the DNA of cells from a bacterial clone. What was the percentage of guanine in the DNA?
    1. 14%
    2. 16%
    3. 36%
    4. 50%

  17. How many nitrogenous bases code for 1 amino acid?
    1. 1
    2. 2
    3. 3
    4. 4

  18. DNA helicase is found where?
    1. Replication Bubble
    2. Replication Complex
    3. Replication Fork
    4. All of these

  19. Which of the following best describes the arrangement of the sides of the DNA molecule?
    1. Twisted
    2. Antiparallel
    3. Bonded
    4. Alternating

  20. How many different amino acids are there?
    1. 1
    2. 5
    3. 20
    4. 100
    5. Infinite