C5 DNA

Question 1

Observed that heat-killed virulent cells could transform nonvirulent cells into virulent cells

Answer 1

Griffith

Question 2

Griffith injected ? into mice

Answer 2

S. Pneumoniae

Question 3

Gave first evidence that DNA could serve as genetic material

Answer 3

Avery, Macleod

Question 4

The transforming principle was developed by ?

Answer 4

Griffith

Question 5

The nature of the transforming principle was verified by ?

Answer 5

Avery, Macleod

Question 6

How was the experiment by Avery, Macleod conducted

Answer 6

Fractionized S-strain cells into major macromolecules. DNA was only macromolecule that transformed R-strain.

Question 7

Hershey-chase experiment was conducted using ? virus

Answer 7

T2

Question 8

How was Hershey-chase experiment conducted?

Answer 8

DNA of virus was fluorescently labeled with one color, and protein with another. Allowed virus to infect E. Coli. DNA only present in infected bacteria.

Question 9

typical size of cell

Answer 9

10 um

Question 10

typical size of nucleus

Answer 10

5-8 um

Question 11

Does chromosome number have an effect on organism complexity?

Answer 11

no

Question 12

the most densely packaged region of chromosomes

Answer 12

heterochromatin

Question 13

complex of DNA and proteins is called

Answer 13

chromatin

Question 14

DNA is initially packaged by basic proteins known as ?

Answer 14

histones

Question 15

Each histone condenses DNA by

Answer 15

3 times

Question 16

DNA wraps around the histone ? times

Answer 16

1.65

Question 17

This histone helps pack nucleosomes to make 30 nm fiber

Answer 17

H1

Question 18

X-activation is a result of

Answer 18

one x-chromosome being completely condensed into heterochromatin

Question 19

epigenetic control

Answer 19

DNA and/or histones can be modified to mark regions for gene expression