Epidemiology: Draw a DAG of the relationship between exposure and outcome, accounting for other variables discussed. Then, write either “Yes” if it appears that confounding of the relationship between the exposure and the outcome is supported (based on the general rule for confounding) and “No” if it appears that confounding is not supported. If “No”, please indicate why it is not a confounder.
In: Biology
The enzymes involved in glycolysis are.....
constitutive proteins
inducible proteins
repressed proteins
regulated proteins
In: Biology
Problem 1. Molecular Genetics
A sea urchin mutation results in an unusual positioning of the mitotic spindle during the very first cleavage division:instead of the zygote dividing along the animal-vegetal axis, the cell is now dividing perpendicular to the A-V axis (as if a globe were divided in halves at the equator plane). You decide to repeat Hans Driesch’s 19th century experiments, carefully separate the resulting blastomeres and let them develop further.
True or false?
Since sea urchins are known to have highly regulative earlydevelopment, you expect to see normally developing embryos. Explain youranswer.
In: Biology
In: Biology
mtr: tryptophan-specific transport protein – transports tryptophan into the cell
trpA: tryptophan synthase, a protein – synthesizes tryptophan from its basic components
cusF: Periplasmic copper binding protein – binds copper ions
tnaA: Tryptophanase – enzyme for tryptophan catabolism
trpB: Tryptophan synthase, b protein – synthesizes tryptophan
Q. If tryptophan caused the expression level to change, explain why these changes occur for each gene (that is, how does the presence of tryptophan in the media influence expression of the gene...you should be able to infer this based on each gene’s known function).
In: Biology
QUESTION 21
Critical results from the microbiology department must be communicated to the clinician immediately. All of the following results are considered critical except:
a. |
positive spinal fluid gram stain on culture |
|
b. |
blood smear for malaria |
|
c. |
negative acid fast stain |
|
d. |
Streptococcus pyogenes from a surgical wound |
QUESTION 22
The tech working on an aerobic wound culture is identifying a colony that is large, gray, and non-hemolytic on blood agar. The tech prepares a gram stain of the colony and notices a consistency similar whisked egg whites. The gram stain reveals a large gram-positive Bacillus. What is the most likely identification of this colony?
a. |
Bacillus anthracis |
|
b. |
Burkholderia mallei |
|
c. |
Bacillus cereus |
|
d. |
Fransicella tularensis |
QUESTION 23
Which of these describes the mode of action of the antibiotic beta-lactam class of antibiotics?
a. |
inhibits DNA synthesis |
|
b. |
inhibits RNA synthesis |
|
c. |
inhibits protein synthesis |
|
d. |
inhibits cell wall synthesis |
In: Biology
Consider an ion for which there are only passive leakage channels. If the membrane potential is farther from the ion’s Nernst potential, the magnitude of the current associated with that ion will be:
a. greater
b. smaller
c. the same
d. none of the above
And why?
In: Biology
What does it mean to say all organisms are identical in the assumptions for the exponential growth model? Does that mean both males and females can reproduce?
In: Biology
1. Describe the path followed by water from the soil, through the plant and into the atmosphere. Where in the path are the important resistances to water movement?
2. What is meant by the term "active transport"? What is the difference between "primary" and "secondary" active transport?
3. Both membrane channels and carriers show changes in protein conformation. What is the role of such conformation changes (a) in channels, and (b) in carriers?
In: Biology
In: Biology
5. (3 pts) What is the minimum number of base substitutions that must be made to change the codons from:
In: Biology
Explain the condition and consequences of directional selection and balancing selection.
*This is a Population Genetics topic.
In: Biology
a. How does regulated secretion differ from constitutive secretion?
b. What would be the effect of mutating the KDEL sequence of a resident ER protein (like BiP)? Would this effect be similar or different from that of mutating the KDEL receptor protein?
c.The pH of a compartment can be critical for association of a receptor and its cargo. How does the acidic pH of a late endosome result in different fates for the receptor and its cargo?
d. Why are carbohydrate groups of glycoproteins always exposed on the surface of the cell?
e.Compare and contrast the sorting of proteins to lysosomes to the packaging of proteins into regulated secretory granules such as those containing insulin.
f. How is a lysosomal protein targeted to a lysosome? What effect would be the addition of a lysosomal signal sequence have of subcellular localization of a protein that is normally cytosolic? How would it affect localization of a protein that is normally secreted?
In: Biology
QUESTION 18
Briefly describe why E. coli wants to express different amounts of the lac operon genes in relation to the presence/absence of glucose and lactose and the molecular mechanism by which it does so for each of the four conditions with respect to glucose and lactose.
QUESTION 19
A rare deletion on the long arm of chromosome 15 (15q11-13) produces one of two types of genetic disorders in humans. These are Prader-Willi syndrome (obesity, hypotonia, hypogonadism) and Angelman syndrome (epilepsy, tremors, perpetual smiling). Three imprinted genes are present in the deleted region. These are snrpn and ndn (lack of which is associated with Prader-Willi) and ube3A (lack of which is associated with Angelman). snrpn and ndn are paternally imprinted for expression and ube3A is maternally imprinted. Charlie and Pat are siblings both with Angelman syndrome and Charlie has one (of two) child with Prader-Willi Syndrome while Pat has a child with Angelman syndrome. What are the sexes of Charlie and Pat? Explain your answer. Can Charlie and Pat have two normal parents or does one of them have Prader-Willi or Angelman syndrome. Explain your answer and if one of them has a disorder tell me which parent had which disorder.
In: Biology
Please Use your keyboard (Don't use handwriting) Thank you..
Courses Name: Health Policy & Saudi Healthcare System
***Please complete my answer to be 500 words ..
I need new and unique answers, please. (Use your own words, don't copy and paste)
Many countries now struggle to provide cost-effective, quality healthcare services to their citizens. Saudi Arabia has experienced high costs along with concerns about quality of care in its public facilities. To address these issues the country is currently restructuring their healthcare system to privatize public hospitals and introduce insurance coverage for both foreign workers and citizens.
Based on the statement given explain the following points:
***Please complete my answer to be 500 words ..
I need new and unique answers, please. (Use your own words, don't copy and paste)
My answer
1. It’s true that many countries struggle to provide cost effective care in public hospitals.
2. If we go back and see the history of Saudi Arabia health care system
In 2002 the Saudi health care system is started by a royal decree to ensure the provision of health care to all Saudi Arabia citizens
later in 2004 in Saudi Arabia there are 1848 primary healthcare centres and 200 hospitals.
2. Components of Saudi health care system
There is a three level health care system in Saudi Arabia
a.primary
b.secondary
c.Tertiary
These tiers correspond to health care Centers and hospitals. Three health sectors are considered in this review - MOH, government sector and private Sector.
3. Challenges of Saufia Arabia kingdom currently facing are
a. Increase in the population
b. Increased cost of treatment and medical expenses
c.concerns about quality and safety of care
d. Increased chronic diseases
e. Less electronic ehealth system
In: Biology