History and Structure of DNA

Question 1

what did griffith use in his experiment?

Answer 1

mice

Question 2

what disease was griffith studying

Answer 2

pneumonia

Question 3

when injected with the virulent s-strain

Answer 3

the mice died

Question 4

when injected with the r-strain

Answer 4

the mice lived

Question 5

when injected with heat killed s-strain

Answer 5

the mice lived

Question 6

when injected with heat killed s-strain and r strain

Answer 6

the mice died

Question 7

griffith concluded that genetic material had been taken from the s-strain. He called this

Answer 7

transformation

Question 8

Avery’s experiment involved the same things as griffiths except,

Answer 8

avery treated the solution with different enzymes to remove different biomolecules

Question 9

when the mice were injected with the DNA-ase treated solution,

Answer 9

the transformation did not occur

Question 10

what is the molecule of heredity?

Answer 10

DNA

Question 11

what were the two biomolecules that scientists thought could be the molecule of heredity?

Answer 11

DNA and protein

Question 12

why did scientists not believe that DNA was the molecule of heredity?

Answer 12

they thought it was too simple to do such an important task

Question 13

nucleotides are made up of phosphate group,

Answer 13

a sugar, and a nitrogenous base

Question 14

pyrimidines have

Answer 14

1 ring

Question 15

which bases are pyrimidines?

Answer 15

thymine, cytosine

Question 16

purines have

Answer 16

2 rings

Question 17

which bases are purines?

Answer 17

adenine and guanine

Question 18

true or false: pyrimidines always pair with purines

Answer 18

true

Question 19

thymine pairs with

Answer 19

adenine

Question 20

cytosine pairs with

Answer 20

guanine

Question 21

Is DNA double or single stranded?

Answer 21

double stranded, forms a double helix structure

Question 22

Is RNA double or single stranded?

Answer 22

single stranded, folds over itself

Question 23

True or False: In RNA, adenine is replaced with uracil.

Answer 23

False. In RNA, uracil replaces thymine

Question 24

Which carbons form covalent bonds that create the sugar phosphate backbone of DNA and RNA molecules?

Answer 24

3’ and 5’