Book: ESSENTIAL BIOLOGY - Chapter 10 question; In a classic 1952 experiment, biologist Alfred Hershey and...
Book: ESSENTIAL BIOLOGY - Chapter 10
question; In a classic 1952 experiment, biologist Alfred Hershey and Martha Chase labeled two batches of bacteriophage one with radioactive sulfur ( which only tags protein) and the other with radioactive phosphorus ( which only tags DNA). In separate test tubes, they allowed each batch of phage to bind to nonradioactive bacteria and inject its DNA. After a few minutes, they separated the bacterial cells from the viral parts that remained outside the bacterial cells and measured the radioactivity of both portions. What results do you think they obtained ? How would these results help them to determine which viral component DNA or protein was the infectious portion ?
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Book: ESSENTIAL BIOLOGY - Chapter 10
question; In a classic 1952 experiment, biologist Alfred Hershey
and...
The Hershey Chase experiment using radioactively labeled bacteriophage to infect bacteria proved that DNA was the...
The Hershey Chase experiment using radioactively labeled bacteriophage to infect bacteria proved that DNA was the genetic material. If you were reviewing those experimental results, which of the following would provide evidence that DNA was the genetic material? Select all that would apply. a) The DNA was localized in the cytoplasm of the bacterial cell, which is the same site that the bacterial chromosome is located. b) Radioactively labeled viral proteins were only found outside the cell and the viral...
The bacteriophage used in this experiment reproduces by the lytic cycle. Suppose a similar experiment were...
The bacteriophage used in this experiment reproduces by the
lytic cycle. Suppose a similar experiment were conducted with a
bacteriophage that uses the lysogenic cycle. How would the effect
on the infected bacteria MOST likely differ?
A. The bacteriophage would attach to the bacteria and reproduce
in the extracellular space.
B. The bacteriophage would become permanently dormant and
unresponsive to environmental cues for reproduction.
C. The bacteriophage would attach its genes to the bacteria’s
DNA, allowing its genes to be...
The bacteriophage used in this experiment reproduces by the
lytic cycle. Suppose a similar experiment were conducted with a
bacteriophage that uses the lysogenic cycle. How would the effect
on the infected bacteria MOST likely differ?
A. The bacteriophage would attach to the bacteria and reproduce
in the extracellular space.
B. The bacteriophage would become permanently dormant and
unresponsive to environmental cues for reproduction.
C. The bacteriophage would attach its genes to the bacteria’s
DNA, allowing its genes to be...
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