Question

The elemental makeup of proteins and DNA aided Alfred Hershey and Martha Chase in designing an experiment to determine which composes genetic material. What was particularly helpful to Hershey and Chase’s experiment?

Bacteriophages contain radioactive sulfur and phosphorous.
Protein has sulfur and very little phosphorous. DNA has phosphorous and no sulfur.
DNA has sulfur and very little phosphorous. Protein has phosphorous and no sulfur.
All of the above are correct.
@pooja195 @Somy

Answer 1

@kaylaprincess

Answer 2

Hm. I am stuck between two answers.

The second and third descriptions.

I would go with : Protein has sulfur and very little phosphorous. DNA has phosphorous and no sulfur.

Why I think second choice : http://en.wikipedia.org/wiki/Hershey%E2%80%93Chase_experiment

( i went over the case in wiki and the above answer then, seems correct ^ )

Answer 3

SO b? @kaylaprincess

Answer 4

correct.

Answer 5

are you sure @kaylaprincess

Answer 6

Yes. States itself in fact in the article.

Answer 7

ok

Answer 8

where in the article

Answer 9

Well you have to know that DNA, has NO sulfur. So that's pretty obvious.

" Hershey and Chase concluded that DNA, not protein, was the genetic material. They determined that a protective protein coat was formed around the bacteriophage, but that the internal DNA is what conferred its ability to produce progeny inside a bacteria. They showed that, in growth, protein has no function, while DNA has some function. They determined this from the amount of radioactive material remaining outside of the cell. Only 20% of the 32P remained outside the cell, demonstrating that it was incorporated with DNA in the cell's genetic material. All of the 35S in the protein coats remained outside the cell, showing it was not incorporated into the cell, and that protein is not the genetic material.[1]

Hershey and Chase's experiment concluded that little sulfur containing material entered the bacterial cell. However no specific conclusions can be made regarding whether material that is sulfur-free enters the bacterial cell after phage adsorption. "

Answer 10

But this is where i was a little iffy

Answer 11

Because this line : " Hershey and Chase's experiment concluded that little sulfur containing material entered the bacterial cell. However no specific conclusions can be made regarding whether material that is sulfur-free enters the bacterial cell after phage adsorption. "

Answer 12

I don't know too much more, so I really can't go on from now of what I've provided. I don't wanna confuse/ or give misinformation to you !!! Tag a super smart user xD

Answer 13

https://www.youtube.com/watch?v=SGViDFQ4Zjk
watch the animation
you will figure out the right answer & be sure about it

Answer 14

B then.

Answer 15

?

Answer 16

so b?

Answer 17

bingo!

Answer 18

thank god lol

Answer 19

thank you lovely <3

Answer 20

A - not true as u can see in the animation
C - absolutely wrong
D- instantly eliminated

Answer 21

No problem :)