BIOL 1100 STUDY GUIDE 4 - BIOL 1100 STUDY GUIDE#4...

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BIOL 1100 STUDY GUIDE #4 Griffith’s 1928 experiment established that: Dead Pneumococcus bacteria release some factor that permanently transforms live Pneumococcus bacteria Hershey and Chase’s 1952 experiment was said to have demonstrated that DNA was the genetic material of bacteriophages. The most important result supporting this conclusion was the fact that: New phages were labeled with radioactive phosphorus In DNA, Hydrogen bonds between bases hold the two strands together The complementarity of the two stands of DNA exists because: Each base has only one other base to which it can bind The two strands of DNA in one molecule are said to be antiparallel because: The 3’ end of one strand is next to the 5’ end of the other strand A DNA strand reads 5’ AGC TAG 3’. An identical strand would read … while a complementary strand would read: 3’ GAT CGA 5’ … 5’ CTA GCT 3’ A-, B-, C-, and Z-DNA are distinguished from one another based on their: Helix structures A bacterium should have about … base pairs in its genome: 5 million The statement that DNA replication is semiconservative means that replication … This was shown by the experiment of: Creates two DNA molecules, each of which consists of one new strand and one old strand … Meselson and Stahl The critical result that allowed the investigators above to draw this conclusion was that: The mid-weight DNA never disappeared and never decreased in density A helicase is an enzyme that: Unwinds the DNA spiral You would expect to find … replication origin(s) on each human chromosome: About 1,000 DNA replication has a strong 5’ to 3’ directionality mainly because: A new nucleotide can only be added to the 3’ carbon of the growing chain The directionality above means that replication always proceeds in a … direction on the old strand: 3’  5’ A DNA strand reads 5’ AGC TAG 3’. When polymerase replicates this strand, the last base it will add to the new strand will be: T When polymerase replicates the 5’ AGC TAG 3’ strand above, will the newly synthesized strand be the leading or the lagging strand?
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