Term
| In 1952, Hershey and chase has conclusively proved what? |
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Definition
| that DNA is the hereditary molecule. |
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Term
| what was found in phage-infected cells and in progeny phages, showing that DNA is the genetic material? |
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Definition
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Term
| what was found in phage coats after infection, but was not found in the infected cell or progeny phages, showing that protein is not the genetic material? |
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Definition
| 35S (used to label proteins) |
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Term
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Definition
Bases A and G
bases T and C |
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Term
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Definition
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Term
| Which bases are Pyrimidines? |
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Definition
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Term
| What are the differences between a purine and pyrimidine? |
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Definition
Purine have two carbon-nitrogen rings.
Pyrimidine have single carbon-nitrogen ring |
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Term
| Erwin Chargaff discovered what? |
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Definition
that nitrogenous bases in DNA occur in definite ratios.
Amount of adenine equals amount of thymine
Amount of guanine equals amount of cytosine |
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Term
| Who came up with the blueprint of what a DNA look like? |
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Definition
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Term
| What is semiconservative replication? |
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Definition
| Each new double helix has one old strand, derived from the parental DNA molecule, and one new strand |
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Term
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Definition
| The new strand, moving along the template, 5’→ 3’ direction |
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Term
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Definition
| old strand, “read” in the 3’ → 5’ direction. |
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Term
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Definition
| extend the new DNA strand, one nucleotide at a time, by moving along the template |
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Term
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Definition
| tethers DNA polymerase to the template strand and increases rate of DNA synthesis |
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Term
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Definition
| unwinds the DNA strands, producing a Y-shaped replication fork |
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Term
| Single-strand binding proteins |
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Definition
| keep the strands from apart |
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Term
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Definition
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Term
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Definition
| attach a short RNA primer to the template DNA |
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Term
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Definition
| binds Okazaki fragments together |
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Term
| How does telomerases solve a particular replication problem? What is that problem? |
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Definition
| telomerase will stop the shortening of telomeres. the lost of telomeres |
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