Targeting a DNA sequence for editing by the CRISPR‑Cas9 system requires that a protospacer‑adjacent motif (PAM)...
Targeting a DNA sequence for editing by the CRISPR‑Cas9 system requires that a protospacer‑adjacent motif (PAM) sequence appear just downstream of the target sequence. For S. pyogenes Cas9 this PAM is the trinucleotide NGG, where N represents any nucleotide.
Assuming a fragment of DNA includes equal amounts of A, C, G, and T bases, how many bases apart, on average, would one expect to find the NGG PAM?
how many bases average PAM distance =
Homework Answers
The required PAM sequence is NGG and the given DNA fragment has an equal distribution of A, C, G and T. This means that each of these bases will have 25% or 1/4 distribution in DNA. So, for a NGG sequence, probability of 'N' = 1 as any nucleotide can occur. Probability of G = 1/4. Thus, overall probability for NGG = 1* 1/4 * 1/4 = 1/16. Thus, 2 NGG sequences will be separated on an average by 16 bases apart.
Add Answer to:
Targeting a DNA sequence for editing by the CRISPR‑Cas9 system
requires that a protospacer‑adjacent motif (PAM)...
Which of the following statements is FALSE? In the context of CRISPR-Cas9 gene editing system, the...
Which of the following statements is FALSE? In the context of CRISPR-Cas9 gene editing system, the PAM sequence: a. A sequence adjacent to the target DNA sequence to be cleaved b. Is present on the non-complementary target DNA strand to the crRNA c. Has the sequence “5’-NGG-3’” where N is any nucleotide d. Stands for "protospacer adjacent motif" e. Is present in the bacterial genome
4. What is the function of each component of the CRISPR-Cas9 system? (1.5 pt) PAM site:...
4. What is the function of each component of the CRISPR-Cas9 system? (1.5 pt) PAM site: Guide RNA: Cas9: 5a. In the DNA below, the "I" line indicates where there is a mutation in a gene. Design a gRNA to find this mutation. Your gRNA will be 8 bases long and will not include the PAM sequence. Keep the following in mind: [2 pts total] i. Scan the top strand left to right and find the PAM site. ii. When...
4. The CRISPR-Cas9 system is an important new technique in molecular biology. What is the natural...
4. The CRISPR-Cas9 system is an important new technique in
molecular biology. What is the natural function of this system?
Describe how you would use this system to generate a null mutation
in another organism (i.e. explain Figure 6-43). How does it work?
What is the modification of the method that allows for correction
of a mutation (e.g. the mouse crystalline gene)? And lastly, what
are the problems with the CRISPR system?
FIGURE 6-43 Single-nucleotide mutations
can be introduced into...
7.. In the controlled termination method of DNA sequencing, reading the gel from _____ gives the...
7.. In the controlled termination method of DNA sequencing, reading the gel from _____ gives the sequence in the _____ direction; _____ fragments that were terminated _____ in polymerization move faster down the gel a. bottom to top; 5′ to 3′; shorter; early b. top to bottom; 5′ to 3′; longer; early c. bottom to top; 5′ to 3′; longer; later d. top to bottom; 5′ to 3′; shorter; early e. bottom to top; 3′ to 5′; shorter; early 8....
ASAP please .. Hey, I need help answering these questions, about the introduction of an article...
ASAP please ..
Hey, I need help answering these questions, about the introduction
of an article about HIV inhibition using adenovirus-delivered
CRISPR/CAS9. Thaanks!!
strand, resulting in double-stranded breaks (DSBs) that trigger cellular repai mechanisms. In eukaryotes, the DSBs are more commonly repaired by the mechanism ot error prone non ho mologous end joining (NHEJ), therefore generating sequence changes, for instance insertions and deletians (indels), around the DSBs. Owing to the simplicity of manipulation and versati ity, the CRISPR/Cas9 system has been...
The picture above represents an agarose gel that was used to analyze plasmid DNA after it...
The picture above represents an agarose gel that was used to analyze plasmid DNA after it was cut with the restriction enzyme HindIll. The plasmid was incubated with Hindill until all of the available Hindlll cut sites were cut by HindIll. After running the sample on the gel, three bands were detected (Note that there are three wells shown at the top of the gel for loading samples, however, only the middle well was loaded with sample). Based on this...
2. A dominant allele H reduces the number of body bristles that Drosophila flies have, giving...
2. A dominant allele H reduces the number of body bristles that Drosophila flies have, giving rise to a “hairless” phenotype. In the homozygous condition, H is lethal. An independently assorting dominant allele S has no effect on bristle number except in the presence of H, in which case a single dose of S suppresses the hairless phenotype, thus restoring the "hairy" phenotype. However, S also is lethal in the homozygous (S/S) condition. What ratio of hairy to hairless flies...
Please read the article bellow and discuss the shift in the company's approach to genetic analysis....
Please read the article bellow and discuss the shift in the
company's approach to genetic analysis. Please also discuss what
you think about personal genomic companies' approaches to research.
Feel free to compare 23andMe's polices on research with another
company's. Did you think the FDA was right in prohibiting 23andMe
from providing health information?
These are some sample talking points to get you thinking about
the ethics of genetic research in the context of Big Data. You
don't have to...
4. What is the function of each component of the CRISPR-Cas9 system? (1.5 pt) PAM site: Guide RNA: Cas9: 5a. In the DNA below, the "I" line indicates where there is a mutation in a gene. Design a gRNA to find this mutation. Your gRNA will be 8 bases long and will not include the PAM sequence. Keep the following in mind: [2 pts total] i. Scan the top strand left to right and find the PAM site. ii. When...
4. The CRISPR-Cas9 system is an important new technique in
molecular biology. What is the natural function of this system?
Describe how you would use this system to generate a null mutation
in another organism (i.e. explain Figure 6-43). How does it work?
What is the modification of the method that allows for correction
of a mutation (e.g. the mouse crystalline gene)? And lastly, what
are the problems with the CRISPR system?
FIGURE 6-43 Single-nucleotide mutations
can be introduced into...
ASAP please ..
Hey, I need help answering these questions, about the introduction
of an article about HIV inhibition using adenovirus-delivered
CRISPR/CAS9. Thaanks!!
strand, resulting in double-stranded breaks (DSBs) that trigger cellular repai mechanisms. In eukaryotes, the DSBs are more commonly repaired by the mechanism ot error prone non ho mologous end joining (NHEJ), therefore generating sequence changes, for instance insertions and deletians (indels), around the DSBs. Owing to the simplicity of manipulation and versati ity, the CRISPR/Cas9 system has been...
The picture above represents an agarose gel that was used to analyze plasmid DNA after it was cut with the restriction enzyme HindIll. The plasmid was incubated with Hindill until all of the available Hindlll cut sites were cut by HindIll. After running the sample on the gel, three bands were detected (Note that there are three wells shown at the top of the gel for loading samples, however, only the middle well was loaded with sample). Based on this...
Please read the article bellow and discuss the shift in the
company's approach to genetic analysis. Please also discuss what
you think about personal genomic companies' approaches to research.
Feel free to compare 23andMe's polices on research with another
company's. Did you think the FDA was right in prohibiting 23andMe
from providing health information?
These are some sample talking points to get you thinking about
the ethics of genetic research in the context of Big Data. You
don't have to...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago