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20 Cards in this Set
- Front
- Back
Griffith's experiments: |
demonstrated the transforming principle |
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Avery, McCloud, and McCarty: |
showed that the transforming principle was DNA |
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The experiments of Hershey and Chase: |
used radioactive phosphorus to label DNA and radioactive sulfur to label proteins |
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Why can't nucleic acids and proteins be distinguished from each other by labeling nitrogen with the 15N isotope? |
Nitrogen is found in both nucleic acids and proteins. |
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Nucleic acids are longs chains of ________. |
nucleotides |
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Which follows the complementary base pair rule? |
A-T, G-C |
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The experiments of ________ showed that a bacterial phage labeled with 35S did not enter the bacteria, eliminating protein as the hereditary material. |
Hershey and Chase |
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In Watson and Crick's model, the two strands of DNA in the double helix are held together by ________. |
hydrogen bonds |
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Two strands of DNA that can form a double helix are said to be ________. |
complementary |
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During DNA replication what determines the sequence of the bases in the new DNA strand? |
sequence of bases in the template strand |
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The semi-conservative model of DNA replication proposed that: |
Each new DNA molecule contains one old strand and one new strand. |
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Which of the following statements is not true? a. Nucleotides are added to the 5' end of a growing chain of DNA. b. The sliding clamp holds the DNA polymerase to the template. c. DNA replication starts at the origin of replication. d. Helicase unwinds the DNA. e. DNA replication is semi-conservative. |
a. Nucleotides are added to the 5' end of a growing chain of DNA. |
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During replication DNA is unwound by ________. |
helicase |
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During DNA replication, the RNA primer is made by ________. |
primase |
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Okazaki fragments are synthesized on ________. |
the lagging strand |
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In DNA replication, which enzyme can proofread and correct mistakes? |
DNA polymerase |
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Mutations: |
are base changes in the DNA |
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Nucleosomes consist of ________ and special chromosomal proteins called ________. |
DNA, histones |
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The loosely packed regions of chromosomes are known as ________. |
euchromatin |
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The buffering regions near the ends of eukaryotic chromosomes are called ________. |
telomeres |