Bio 1A Lecture 15

Front 1

In the meselson-stahl experiment what was the determine DNA sturcture?

Back 1

semiconservative replication

Front 2

what is the oswald avery experiment

Back 2

**Oswald Avery showed that **DNA is responsible for the transmission of heritable characteristics.

**experiment in which he injected mice with a mixture of a harmless strain of living pneumococci and the dead remains of a virulent strain of the bacteria. The mice died from infection by the live organisms of the virulent strain, though the organisms had been dead when they were administered. By 1932 Avery focused on transformation—a process by which heritable characteristics of one species are incorporated into another different species.

Front 3

Avery and his co-workers had conclusively proven that DNA was the

Back 3

transforming principle responsible for the development of polysaccharide capsules in the unencapsulated bacteria

Front 4

why was this expt extremely important

Back 4

because, for the first time, scientists had proven that DNA controls the development of a cellular feature. It also implicated DNA as the basic genetic material of cells and stimulated James Watson and Francis Crick to later discover its structure and method of replication.

Front 5

A and T bp is stabilze by how many H bonds

Back 5

2

Front 6

GC bp is stabilize by how many bp

Back 6

3

Front 7

DNA made up of nucleotides and contains three part

Back 7

sugar, base, triphosphate

Front 8

any base that is added to an existing molecule must be added to the _____ position

Back 8

3' position

Front 9

5' phosphate is attacked by ____

Back 9

3' hydroxyl

Front 10

what is protein purification

Back 10

sequential frationation (to understand how rxn works)