Biology

Biology, 15.07.2019 22:00, jameslinimk

Scientists discovered that dna contained the heredity information by studying the dna and the protein coating of a bacteriophage. a bacteriophage is:

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Biology, 23.07.2019 06:00, zayyyyy70

The picture shows a 3-d model of a virus called a bacteriophage .bacteriophage can infect bacteria such as e.coll

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Biology, 12.09.2019 22:30, Shadow0202

Bacterial cells were coinfected with two types of bacteriophage lambda: one carried the c+ allele and the other the c allele. after the cells lysed, progeny bacteriophage were collected. when a single such progeny bacteriophage was used to infect a new bacterial cell, it was observed in rare cases that some of the resulting progeny were c+ and others were c. explain this result.

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Biology, 12.09.2019 23:30, katiebaby4109

A. you have a test tube containing 5 ml of a solution of bacteriophage, and you would like to estimate the number of bacteriophage in the tube. assuming the tube actually contains a total of 15 billion bacteriophage, design a serial dilution experiment that would allow you to estimate this number. ideally, the final plaque-containing plates you count should contain more than 10 and less than 1000 plaques. b. when you count bacteriophage by the serial dilution method as in part a, you are assuming a plating efficiency of 100%; that is, the number of plaques on the petri plate exactly represents the number of bacteriophage you mixed with the plating bacteria. is there any way to test the possibility that only a certain percentage of bacteriophage particles are able to form plaques (so that the plating efficiency would be less than 100%)? conversely, why is it fair to assume that any plaques are initiated by one rather than multiple bacteriophage particles?

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Biology, 12.10.2019 00:30, veronica022

Which of the following is true of generalized bacteriophage transduction? a. the bacteriophage packages fragments of bacterial dna into new phage particles. b. the bacteriophage must enter the lysogenic cycle. c. the bacteriophage chromosome has a region homologous to the bacterial chromosome.

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