Biology, 10.03.2020 17:14 AlexGaming1822

When a DNA solution is boiled, double-stranded DNA denatures. If the solution is then cooled slowly for a long period of time (using the appropriate concentrations of salts), the complementary strands ultimately reassociate, forming proper double-stranded DNA. The process is called renaturation.

a) 15N-labeled DNA from bacteriophage T2 is mixed in equal proportions with T2 DNA of normal density and then heated together and slowly cooled. The resulting DNA is analyzed by centrifiguation in a CsCl density gradient of the type used by Meselson and Stahl. How many bands will be observed and what will their relative proportions be? H = heavy, L = light.

b) The above experiment is repeated, but now 15N-labeled DNA from bacteriophage T2 is mixed with DNA of normal density from a different bacteriophage – T7. The genomes of bacteriophages T2 and T7 have very different DNA sequences. How many bands will be observed and what will their relative proportions be?

A.1 HH: 0 HL : 0 LL

B.0 HH: 1 HL : 0 LL

C.0 HH: 0 HL : 1 LL

D.1 HH: 0 HL : 1 LL

E.1 HH: 1 HL : 1 LL

F.1 HH: 2 HL : 1 L

Answers: 3

Show answers

Another question on Biology

Biology, 22.06.2019 03:30

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Answers: 3

Answer

Biology, 22.06.2019 04:00

Cassandra made a venn diagram to compare and contrast the two stages of cellular respiration. which belongs in the area marked x? energy is released. oxygen is used up. glucose is broken down. carbon dioxide is used up.

Answers: 1

Answer

Biology, 22.06.2019 11:00

What happens as electrons move along the chain of molecules known as the electron transport chain? they gain energy, which causes atp molecules to lose phosphate groups. they gain energy, which causes h *ions to join with oxygen to produce water. they lose energy, which is then used by the cell to make atp. they lose energy, which is then used to break down atp.

Answers: 3

Answer

Biology, 22.06.2019 17:00

The us council on environmental quality, the world wildlife fund of the united states, the ecological society of america, the smithsonian institution, and the international union for the conservation of nature have proposed four principles of wildlife conservation. which of the following does not apply to wildlife conservation? a) continuous monitoring, analysis, and assessment b) ecosystem maintenance that includes wildlife c) a plan encompassing entire communities of organisms and all renewable resources d) a continued interest in harvesting populations for sport

Answers: 1

Answer

You know the right answer?

When a DNA solution is boiled, double-stranded DNA denatures. If the solution is then cooled slowly...

Questions