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WorksheetsBIO 30_Lec 5_DNA Importance, Events, and Scientists
Total questions: 27
Worksheet time: 20mins
In 1830s, it was regarded as the most important molecules.
(a)
Greek for "of first importance"
(a)
Scientist that stated 6 characteristics of genetic material (slide)
(a)
1860s, while characterizing proteins from pus cells, a molecule different from protein was isolated from the nucleus and called it "nuclein" (DNA)
Fredrich Miescher
Earnst Haeckel
Edmund Wilson
Fredrerick Griffith
Earnst Haeckel
Fredrich Miescher
Edmund Wilson
Fredrerick Griffith
1895, using staining technique, he discovered that the most important nuclear element handed from cell to cell was the DNA. Observed through the karyokinesis of ovum.
Edmund Wilson
Fredrich Miescher
Earnst Haeckel
Fredrerick Griffith
1928, US Medical Officer did transformation experiment (on mouse) using Streptococcus pneumoniae and declared the presence of *transforming principle*. (Rough->Smooth)
Fredrerick Griffith
Fredrich Miescher
Earnst Haeckel
Edmund Wilson
1930s, _._. (a) , a quantitative geneticist stated two points about genes:
1. Hypothetical Entity
2. Chemical compound
1952, Blender experiment, they proved that the DNA is the genetic material of bacterial viruses which is injected into the cell during infection. Labelled DNA with P32 and protein coat with 35S.
Oswald Avery, Colin Macleod, and Maclyn McCarthy
Alfred Hershey & Martha Chase
Norton Zinder, Joshua and Esther Lederberg
Rosalind Franklin, Maurice Wilkins, James Watson, and Francis Crick
In 1957, they reconstructed the TMV A and B virus and found that:
1. RNA A with B coat = Type A progeny
2. RNA B with A coat = Type B progeny
Heinz Frankel-Conrat and B. Singer
Alfred Hershey and Martha Chase
Oswald Avery, Colin MacLeod
and Maclyn McCarty
Norton Zinder, Joshua and
Esther Lederberg
In 1958, they proved that the DNA was replicated in a semi-conservative manner by growing E. coli in 15N and 14N. They isolated the DNA and centrifuged it in cesium chloride. The different densities per generation showed heavy, hybrid, and hybrid markers.
Norton Zinder, Joshua and
Esther Lederberg
Matthew Meselson and
Franklin Stahl
Erwin Chargaff and Jerry Donohue
Linus Pauling and Francis Crick
