What are the treatment options for prion infections?
Question 28 (1.8 points) Which of the following statements about treatment or prevention of a prion infection is true? Antibiotic therapies such as penicillin are very effective cures. High doses of anti-inflammatory drugs such as ibuprofen reduce the symptoms of prion infections. There is no known treatment or cure for prion infections.
What is prion disease?
Which of the following statements about the treatment or prevention for a prion infection is true? There is no known treatment or cure for prion infections. When a T2 bacteriophage infects an Escherichia coli cell, which part of the phage enters the bacterial cytoplasm? only the DNA.
What tests are used to diagnose prion disease?
B) High doses of anti-inflammatory drugs such as ibuprofen reduce the symptoms of prion infections. C) Preventative vaccines have recently been shown to be effective in preventing prion infections. D) There is no known treatment or cure for prion infections.
What are prions and how do they affect the brain?
Jan 07, 2022 · Prion diseases are a rare group of neurodegenerative disorders. Learn more about the symptoms, causes, treatment options, and tips for prevention.
Which of the following people conducted the experiment demonstrated that DNA is the genetic material of bacteriophages?
In 1952 Alfred Day Hershey and Martha Chase used the T2 bacteriophage in a famous experiment in which they demonstrated that only the nucleic acids of phage molecules were required for their replication within bacteria. The results of the experiment supported the theory that DNA is the genetic material.
When one DNA molecule is copied to make two DNA molecules The new daughter DNA strands contain?
At the end of the process the cell has made to identical copies of all the biological information contained on the original, parental, DNA molecule, but the two new daughter DNA molecules are "Half old" and "Half new". Half the original DNA molecule is saved, or conserved in the daughter molecules.
When one DNA molecule is copied to make two DNA molecules each of the new DNA contains?
When one DNA molecule is copied to make two DNA molecules, each new DNA contains 100% of the parent DNA. DNA replication uses each strand of a DNA molecule as a template for the creation of a new strand. You just studied 10 terms!
Which of the following people conducted the experiment that demonstrated that DNA is double stranded?
The Hershey–Chase experiments were a series of experiments conducted in 1952 by Alfred Hershey and Martha Chase that helped to confirm that DNA is genetic material.
What happens to the DNA molecule during the second step of DNA replication?
During the second phase, elongation, DNA polymerase synthesises the new DNA from each strand; the leading strand is synthesised continuously, the lagging strand requires discontinous synthesis of smaller fragments.
How does the cell make a copy of DNA during replication?
If the two strands of a DNA molecule are separated, each can be used as a pattern or template to produce a complementary strand. Each template and its new complement together then form a new DNA double helix, identical to the original.
What stabilizes the DNA molecule during replication?
The DNA double helix is opened by helicase into individual strands. Topoisomerase relieves the tension further down the double helix. SSBPs stabilize the single DNA strands to prevent them from reconnecting.Jun 1, 2020
What happens during copying of DNA?
Answer: A method where a molecule of DNA creates two identical copies of itself inside a reproductive cell is called copying of DNA. In the process of DNA replication, the DNA makes multiple copies of itself. It is a biological polymerization which proceeds in the sequence of initiation, elongation, and termination.
Does DNA have to break apart to be copied?
DNA does not have to break apart to be copied. True or False: After DNA replication is complete, there are two new DNA molecules; one molecule has both of the original strands and one molecule has two new strands of DNA.
What is the significance of this famous experiment What does it demonstrate?
His famous experiment was conducted in 1928. In his experiment streptococcus Pneumoniae smooth virulent bacteria plus live rough R-strain bacteria killed mice. His experiment demonstrated that DNA was the genetic material.
Which of the following statements describes the process of transformation in bacteria?
Which of the following statements describes the process of transformation in bacteria? External DNA is taken into a cell, becoming part of the cells genome. In his transformation experiments what phenomenon did Griffith observe?
Who carried out the first experiment that led to the discovery of DNA as the genetic material?
However, the description of DNA actually began 135 years ago with its discovery by Friedrich Miescher, a much less known man who isolated the hereditary material in 1869.Feb 15, 2005
What is the lagging strand of DNA?
The lagging strand is made of a series of pieces that must be joined together to make a continuous strand. E. The two strands of parental DNA are separated during DNA replication. A. DNA ligase adds nucleotides to the lagging strand. The copying mechanism of DNA is most like.
What is DNA made of?
DNA is composed of sugars, phosphates, and bases. What did Rosalind Franklin's famous photo 51 show? DNA is a helix. Erwin Chargaff observed that the proportions of adenine (A) and thymine (T) bases were always equal, as were the proportion of guanine (G) and cytosine (C).
What is the treatment for prion disease?
Scientists continue to work to find an effective treatment for prion diseases. Some of the potential therapies that are being investigated include use of anti-prion antibodies and “ anti-prions.
How rare are prion diseases?
Prion diseases are very rare. Approximately 350 new cases of prion disease are reported each year in the United States. Researchers are still working to understand more about these diseases and to find an effective treatment. Currently, prion diseases are always eventually fatal.
What is the thalamus affected by?
Variant Creutzfeldt-Jakob disease (vCJD). This form of CJD can be acquired through eating the contaminated meat of a cow. Fatal Familial insomnia (FFI). FFI affects the thalamus, which is the part of your brain that manages sleeping and waking cycles. One of the main symptoms of this condition is worsening insomnia.
What is the disease of cows called?
Bovine spongiform encephalopathy (BSE). Commonly called “mad cow disease,” this type of prion disease affects cows. Humans who consume meat from cows with BSE can be at risk for vCJD.
What is CSF testing?
Cerebrospinal fluid (CSF) testing. CSF can be collected and tested for markers associated with neurodegeneration. In 2015, a test was developed to specifically detect markers of human prion disease.
Is GSS inherited?
Gerstmann-Straussler-Scheinker syndrome (GSS). GSS is also inherited.