A loss-of-function mutation in which of the following would have
the same effect as a gain-of-function mutation in Ras?
A.
Crk
B.
Csk
C.
Myc
D.
NF1
E.
Ab
A loss-of-function mutation in which of the following would have the same effect as a gain-of-function mutation in Ras?
D) NF1
Neurofibromin 1 (NF1) is a human gene that is located on chromosome 17. NF1 is responsible to code for neurofibromin. When Ras-Nf1 complex can be assembled, active Ras can able to bind in the groove that exists in the neurofibromin catalytic domain.
A loss-of-function mutation in which of the following would have the same effect as a gain-of-function...
Which of the following point mutations would have little or no effect on cellular function? Select all that apply. a. mutation from AUA to AUG b. mutation in exon c. mutation in intron d. mutation in regulatory region e. mutation from CUC to AUUU f. mutation from UUA to UUG (selected mutation in intron, mutation from UUA to UUG = 0.67/1 ) (selected mutation in intron, mutation from AUA to AUG = 0/1 )
What happens to the mutated Braf? Is this mutation a gain of function or loss of function?
Question 11 (1 point) Which type of mutation is the least likely to occur? a) Gain of function mutation b) Lethal mutation. O ) Loss of function mutation. d) Neutral mutation. Question 12 (1 point) Which type of mutation is least likely to be passed on to future generations of cells? a) Gain of function mutation. b) Lethal mutation. Oc) Loss of function mutation. d) Neutral mutation. Question 13 (1 point) Which type of mutation tends to accumulate at a...
QUESTION Which one of the following statements is correct? A Anonsense mutation changes a stop codon to an amino-acid coding codon B: A nonsense mutation changes an amino-acid codon to a stop codon C: A silent mutation changes the amino acid sequence of the polypeptide D. A missense is usually more severe than a nonsense mutation E A Silent mutation is usually more severe than a missense mutation QUESTIONS "In a plant in which 2n - 24. what is the...
What would be the most likely effect of a mutation in each of the following in an E. coli genome? (A) -8; (B) -35; (C) -20; (D) Start site.
For a given gene mutation reserchers have noticed that histone deacetylase (HDAC) is beneficial in vitro. 1. What method would you utilize to determine gene mutation is loss of function or toxic gain of function? 2. Based on HDAC eveidence would you expect loss of function or toxic gain of function? 3. What approach(es) would be a viable molecular therapy? How would the approach mediate the effect? 4. How would you determine whether the effect is cell type specific?
2. The following is a description of a signaling pathway initiated by receptor tyrosine kinases. Ligand → RTK → Sos → Ras → Raf → MEK → ERK → Transcription factor → Cell growth A. (3pts) Which of these steps indicates the protein is activated after a GTP exchange step? B. (3pts) Which of these proteins can be deactivated by phosphatases? C. (4pts) Describe a mutation that would cause Ras to be permanently "on"? Would this mutation lead to high...
13. Which of these statements is TRUE? a. Cancer cells usually have more than one mutation. . Proto-oncogenes are normal genes that code for proteins that cause cells to undergo apoptosis (programmed cell death) c. Cancer usually involves a gain-of-function mutation in a tumor suppressor gene d. Cancer usually involves a loss-of-function mutation proto-oncogene
What would be the effect of each type of the following mutations? a,) Mutation that destroys the function of eukaryotic DNA polymerase alpha. b.) A mutation that destroys the 5' to 3' exonuclease activity of DNA polymerase I.
19.) Oxidation always involves atoms or A) loss, gain, loss B) gain, loss, gain C) loss, loss, gain D) gain, gain, loss of electrons and may involve _ of oxygen of hydrogen atoms 20.) When an organic molecule loses hydrogen atoms it is said to be: A) reduced B) oxidized C) both oxidized and reduced D) neither oxidized nor reduced 21.) When a substance is oxidized, it is called a(n): A) oxidizing agent B) reducing agent c) both an oxidizing...