Avery, MacLeod and McCarty extended Griffith’s research and found that the transforming principle was: a) DNA because tr

[answerhappygod]

Avery, MacLeod and McCarty extended Griffith’s research and
found that the transforming principle was:
a) DNA because transformation was inhibited by enzymes that
destroyed proteins
b) DNA because transformation was inhibited by enzymes that
destroyed RNA
c) DNA because transformation was inhibited by enzymes that
destroyed DNA
d) All of the above
In Messelson and Stahl’s experiment, they confirmed that DNA
replication was _________ because after two rounds of replication
they observed ____________:
a) dispersive; one light weight band (less dense)
b) conservative; one heavy weight band (more dense)
c) semiconservative; one light weight band and one intermediate
weight band
d) semiconservative; two heavy weight bands
To help elucidate the double helix structure of DNA,
_____________ used base pairing information discovered by
_____________ that revealed a 1:1 ratio of A to T versus C to
G.
a) Watson and Crick; Franklin
b) Watson and Crick; Chargaff
c) Franklin; Messelson and Stahl
d) Avery/Franklin
e) none of the above
It is well-established that DNA synthesis along the leading
strands and lagging strands is different. Which of the following is
the basis for this difference?
a) DNA ligase works only in the 3’ -> 5’ direction.
b) DNA polymerase III can only add a nucleotide to the free
3’-OH of the newly synthesized strand.
c) Helicase works on the 5’ end of the newly synthesized
DNA.
d) DNA polymerase III can only add a nucleotide to the free
5’-OH of the pre-existing DNA strand.
e) none of the above