DNA & RNA (Help?)?

Question

I did all my homework but I have like a few questions I can not figure out what the answers are... Could you help me out??

>List the three critical things that genes were known to do.

>How did Watson and Crick describe the structure of DNA?

>Rosalind Franklin's work with X-ray diffraction showed that the DNA molecule is shaped like a(an)_____and contains_____strands.

>Circle the letter of each sentence that is true about Griffith's experiment.

A.Mice injected with bacteria from smooth colonies died.

B.Mice injected with bacteria from rough colonies died.

C.Mice injected with heat-killed bacteria from smooth colonies died.

D.Mice injected with a mixture of bacteria from heat-killed smooth colonies and live rough colonies died.

Answer 1

--Genes express proteins; act as structural motifs in the DNA; and regulate the expression of other genes.

--as an antiparallel double helix.

--helix, two

--A and D

Answer 2

dont know the first one or second one but the third is: X and contains nucleic strands or DNA strands, not sure

sorry i cant help that much becuase i dont have my bio book anymore