Biology, 17.04.2020 19:07 Fluffyboi

Avery, MacLeod, and McCarty (1944) demonstrated that DNA was the genetic material by treating heat-killed Streptococcus pneumoniae S (smooth) strain with DNase, thereby preventing transfer of the "transforming substance" from the killed S strain to the live R (rough) strain when the two were mixed together and injected into mice. Another way that one could demonstrate transformation in bacteria would be to extract DNA from:

A) an R strain and mix it with cells of an S strain.
B) both S and R strains and mix it to allow recombination to take place.
C) an ampicillin-sensitive strain and mix it with cells of an ampicillin-resistant strain.
D) an S strain and mix it with cells of an R strain.
E) None of the above are correct.

Answers: 2

Show answers

Another question on Biology

Biology, 22.06.2019 06:00

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

Answers: 1

Answer

Biology, 22.06.2019 10:30

In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? a) they study alleles that contain chromosomes, which are rna.b) they study alleles that contain genes, which are chromosomes.c) they study chromosomes that contain genes, which are dna segments.

Answers: 1

Answer

Biology, 22.06.2019 13:00

14) whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.

Answers: 2

Answer

Biology, 22.06.2019 19:30

All other things being equal the size of a population will decrease if

Answers: 2

Answer

You know the right answer?

Avery, MacLeod, and McCarty (1944) demonstrated that DNA was the genetic material by treating heat-k...

Questions