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
Biology, 22.06.2019 08:00
Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen
Answers: 1
Biology, 22.06.2019 10:30
Error analysis: what might be the reason that some of your percentages didn't exactly match your predicted results? gametes aren't responsible for inheritance. mice don't have large litters, so the sample size was not large enough. the wrong type of mice were used.
Answers: 3
Biology, 22.06.2019 11:30
According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes
Answers: 2
When a DNA solution is boiled, double-stranded DNA denatures. If the solution is then cooled slowly...
Computers and Technology, 12.08.2020 04:01
Mathematics, 12.08.2020 04:01
Social Studies, 12.08.2020 04:01
Mathematics, 12.08.2020 04:01
Social Studies, 12.08.2020 04:01
Computers and Technology, 12.08.2020 04:01