4.1 SG

Question 1

What disease was Griffin researching?

Answer 1

Pneumonia

Question 2

What process did Griffin call the one strain of bacteria acquiring a factor from another bacteria?

Answer 2

Transformation

Question 3

Hershey and Chase Experiment: Phase 1

Answer 3

One batch of viruses was labeled with radioactive phosphorous which is incorporated in the DNA. Another batch of viruses was labeled with radioactive sulfur which is incorporated into the protein coat.

Question 4

Hershey and Chase Experiment: Phase 2

Answer 4

Bacteria was infected with the viruses. The researchers were looking to identify if viral DNA or viral proteins entered the host bacteria cell.

Question 5

Hershey and Chase Experiment: Phase 3

Answer 5

The cultures were blended and centrifuged to separate the viruses from the bacteria.

Question 6

Hershey and Chase Experiment: Phase 4

Answer 6

Bacteria infected with the DNA-marked viruses, contained 32p. Bacteria infected with Protein-marked viruses, contained no markers.

Question 7

Chargaffs Rules

Answer 7

1. In any doubled stranded DNA, the number of G=C and A=T
2. The relative amounts of A,G,C,T varies from 1 spice to next, accounts for genetic diversity.

Question 8

If a species has approximately 31% C what is the approximate % for the rest of the bases?

Answer 8

A-19
G-19
T-31
C-31