Which of the following is correct about Hershey-Chase experiment?

Inhaltsverzeichnis:

1. Which of the following is correct about Hershey-Chase experiment?
2. Which of the following is the most important reason Hershey and Chase chose to use bacteriophages in their experiments?
3. Why did Hershey and Chase use bacteriophages?
4. What was transformed in Griffith's experiment?
5. Why did Hershey and Chase use 32P and 35S?
6. How did Hershey and Chase label phage DNA?
7. What is the role of and in the experiments conducted by Hershey and Chase?
8. Why RNA is not a suitable genetic material?
9. Is thymine more stable than uracil?
10. Why is RNA more important than DNA?
11. Which is the first genetic material?
12. Which came first protein or DNA?
13. Which is the first genetic material and why?
14. Is RNA more complex than DNA?
15. How is RNA converted to DNA?
16. What is RNA vs DNA?
17. Do viruses have DNA?
18. What viruses are DNA viruses?
19. How do you kill RNA virus?
20. Are viruses considered living?
21. What is the oldest virus?
22. Can viruses reproduce on their own?
23. Where did viruses evolve from?
24. Do viruses predate life?
25. What is the only goal of a virus?
26. Why Do Viruses harm us?

Which of the following is correct about Hershey-Chase experiment?

They discovered that the protein from the virus entered the cell, while the DNA stayed behind. ... They determined that infected bacteria contained tags from the virus's DNA. -is correct about the Hershey-Chase experiment.

Which of the following is the most important reason Hershey and Chase chose to use bacteriophages in their experiments?

Bacteriophages were used because they contain little more than DNA and protein. ... Alfred Hershey and Martha Chase used the bacteriophages because of their connection to DNA. In one batch, the phages (short for bacteriophages) were grown with radioactive phosphorous, which means it was incorporated into phage DNA.

Why did Hershey and Chase use bacteriophages?

Alfred Hershey and Martha Chase used the bacteriophages because of their connection to DNA. ... The phages were mixed with bacteria and because of the way they function, the phages infected the bacterial cells.

What was transformed in Griffith's experiment?

Griffith concluded that the type II-R had been "transformed" into the lethal III-S strain by a "transforming principle" that was somehow part of the dead III-S strain bacteria. Today, we know that the "transforming principle" Griffith observed was the DNA of the III-s strain bacteria.

Why did Hershey and Chase use 32P and 35S?

Discuss the rationale and conclusions of this experiment. The 32P (phosphorus) was used in the Hershey-Chase experiment because phosphorus is present in deoxyribonucleic acid (DNA), but not in protein. Hence, 35S was used to label only the proteins because DNA does not contain sulfur.

How did Hershey and Chase label phage DNA?

Method. Hershey and Chase used T2 phage, a bacteriophage. The phage infects a bacterium by attaching to it and injecting its genetic material into it. They labeled the phage DNA with radioactive Phosphorus-32.

What is the role of and in the experiments conducted by Hershey and Chase?

Answer. The unequivocal proof that DNA is the genetic material came from the experiments of Alfred Hershey and Martha Chase (1952). They worked with viruses that infect bacteria called bacteriophages. ... Hershey and Chase worked to discover whether it was protein or DNA from the viruses that entered the bacteria.

Why RNA is not a suitable genetic material?

This hydroxyl group make RNA less stable than DNA because it is more susceptible to hydrolysis. ... Messenger RNA (mRNA) carries the genetic information that directs the synthesis of proteins. Some viruses use RNA instead of DNA as their genetic material. Most of the RNA, however, does not code for proteins.

Is thymine more stable than uracil?

Uracil is less chemically stable than thymine. Deamination of cytosine converts it to uracil.

Why is RNA more important than DNA?

Due to its deoxyribose sugar, which contains one less oxygen-containing hydroxyl group, DNA is a more stable molecule than RNA, which is useful for a molecule which has the task of keeping genetic information safe. RNA, containing a ribose sugar, is more reactive than DNA and is not stable in alkaline conditions.

Which is the first genetic material?

DNA

Which came first protein or DNA?

You can't make new proteins without DNA, and you can't make new DNA without proteins. So which came first, proteins or DNA? The discovery in the 1960s that RNA could fold like a protein, albeit not into such complex structures, suggested an answer.

Which is the first genetic material and why?

In cells, RNA is the first genetic material because: 1. RNA is capable of preserving and catalyzing genetic information. 2.

Is RNA more complex than DNA?

RNA, or ribonucleic acid, helps carry out this blueprint's guidelines. Of the two, RNA is more versatile than DNA, capable of performing numerous, diverse tasks in an organism, but DNA is more stable and holds more complex information for longer periods of time.

How is RNA converted to DNA?

Reverse transcriptase (RT), also known as RNA-dependent DNA polymerase, is a DNA polymerase enzyme that transcribes single-stranded RNA into DNA. This enzyme is able to synthesize a double helix DNA once the RNA has been reverse transcribed in a first step into a single-strand DNA.

What is RNA vs DNA?

Differences Between DNA and RNA

DNA (Deoxyribonucleic acid)	RNA (Ribonucleic acid)
DNA is functional is the transmission of genetic information. It forms as a media for long-term storage.	RNA is functional is the transmission of the genetic code that is necessary for the protein creation from the nucleus to the ribosome.

Do viruses have DNA?

Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. The simplest viruses contain only enough RNA or DNA to encode four proteins.

What viruses are DNA viruses?

DNA virus: A virus in which the genetic material is DNA rather than RNA. The DNA may be either double- or single-stranded. Major groups of double-stranded DNA viruses (class I viruses) include the adenoviruses, the herpes viruses, and the poxviruses.

How do you kill RNA virus?

Researchers have developed CRISPR-Cas13 enzyme-based technology that can be programmed to both detect and destroy RNA-based viruses in human cells. Researchers have turned a CRISPR RNA-cutting enzyme into an antiviral that can be programmed to detect and destroy RNA-based viruses in human cells.

Are viruses considered living?

Most biologists say no. Viruses are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.

What is the oldest virus?

Smallpox and measles viruses are among the oldest that infect humans. Having evolved from viruses that infected other animals, they first appeared in humans in Europe and North Africa thousands of years ago.

Can viruses reproduce on their own?

How do viruses multiply? Due to their simple structure, viruses cannot move or even reproduce without the help of an unwitting host cell. But when it finds a host, a virus can multiply and spread rapidly.

Where did viruses evolve from?

Viruses may have arisen from mobile genetic elements that gained the ability to move between cells. They may be descendants of previously free-living organisms that adapted a parasitic replication strategy. Perhaps viruses existed before, and led to the evolution of, cellular life.

Do viruses predate life?

This hypothesis proposes that viruses evolved from genes that “escaped” from cellular organisms at multiple stages during the evolution of early life. ... Later studies expanded on the evidence for this hypothesis to suggest that viruses evolved not from modern cells but from primordial ancestors that predated LUCA (7).

What is the only goal of a virus?

The main purpose of a virus is to deliver its genome into the host cell to allow its expression (transcription and translation) by the host cell.

Why Do Viruses harm us?

Our body fights viruses by creating an inflammatory response and calling in specialist cells from our tissues and organs. Some of these cells can make antibodies against the virus, some destroy the infected cells, and others build a memory of the virus for next time.