When looking at data on average life expectancy in different developed countries, the average life expectancy in the United States is significantly lower than that of many other developed countries. What are three factors that contribute to this lower life expectancy, and how are they related to each other? What is a realistic way to help reduce these problems?
In: Biology
In: Biology
answer the following questions
1 what are the six keys that determine the RUG three
groupers.
2 what are the three components that together reflect
the cost of the particular procedure
3 what are the major categories of suppliers of the hco?
4 what are the four major payment method unit that are used in the healthcare
In: Biology
human growth hormone (HGH) has been taken by athletes to gain a competitive advantage. This protein is also found naturally. Assuming that blood contains HGH, describe a test that could be developed to test large numbers of athletes in a short period of time and describe one that would not be as feasible. Briefly explain your choices.
In: Biology
In: Biology
1. If all cell types have the exact same genome, how can they be different from one another?
2. do you think transcription through introns is sufficient to explain transcription of 75% of the genome? Why or why not?
In: Biology
In: Biology
In detail describe the function of centrosomes in mitosis as well as how extra centrosomes are able to cause aneuploidy.
In: Biology
Part A: What is the probability of producing and F1 offspring that phenotypically resemble either parent from the cross?
AaBbCC x aabbCc
Note: Assume that capital letters represent completely dominant alleles.
Part B: Same cross. But in this case the alleles are incompletely dominant. What is the probability of producing and F1 offspring that phenotypically resemble either parent from the cross?
In: Biology
Experiment 2 – Light Independent Reaction
After the light dependent reaction, the light independent takes place. During this phase, also known as the Calvin Cycle, the energy generated in the light independent phase is used to fixate the carbon atoms from carbon dioxide and glucose is produced.
In this experiment you will use baby spinach leaves to demonstrate the utilization of carbon dioxide during the light independent reaction of photosynthesis. Phenol red is an organic dye that undergoes a color change according to pH . The color of this compound will appear as follows:
Because phenol red can be used to detect changes in pH, it can also be used as an indirect method of detecting changes in the amount of CO2 dissolved in a solution. When CO2 is added to a solution, some of it reacts with water to produce an acid called carbonic acid. In turn, some of the carbonic acid dissociates to increase the [H+] in the solution. Therefore, if the amount of CO2 in a solution is increased, the [H+] increases (pH is lowered) and the solution becomes more acidic. It also follows that if the amount of CO2 in a solution is lowered (e.g., by removal of CO2 from the solution), the [H+] will decrease (pH increases) and the solution becomes more basic. The chemical reactions involved are shown below.
To detect the process of carbon fixation (CO2 reduction), you will use this pH indicator to detect changes in the CO2 level.
Materials
Fresh spinach leaves
2 glass test tubes
2 - 250 ml beakers
Phenol red solution
Permanent marker or wax pencil
Water *
Sunshine or bright light source *
Stopwatch/timer
Metric ruler
Procedure
Add 20 ml of phenol red solution to 2 glass test tubes.
With your straw , blow bubbles over the top of the solution until it turns yellow. The color change occurs when the water in the phenol red solution and the CO2 are combined forming carbonic acid . Make sure that both tubes are the same shade of yellow.
Add a small leaf of baby spinach to tube 2 only
Place the 2 test tubes into sunshine or a bright light at time for 2 hours.
Record the color every ½ hour.
|
Table 2: Change is Color (phenol red) |
|||||
|
0 time |
½ hour |
1 hours |
1 ½ hours |
2 hours |
|
|
Tube 1 |
|||||
|
Tube 2 |
|||||
Questions
What is the independent variable in this experiment?
What is the dependent variable in this experiment?
What happened to the color of the solution over time?
What is the process that is occurring to make the phenol red solution change colors?
What is the function of the following components in the process of photosynthesis (this may differ than how this compounds were used in the experiment)
CO2:
Light:
H2O:
O2:
Chloroplasts:
In: Biology
In: Biology
Would you be more likely to find single nucleotide polymorphism in the protein-coding or in the noncoding dna of the human genome? Please explain, I do not understand the key.
In: Biology
True or false One of the most important principles governing an ecosystem is that the inputs to the ecosystem are equal to the outputs
In: Biology
1. What is the importance of generating isolated bacterial colonies?
2. Describe how a bacterial sample would be obtained from and inoculated into each of the following types of media.
Agar slant:
Agar plate:
Broth:
4. What is a subculture?
6. How would a subculture appear if a colony containing both S. marcescens and M. luteus was subcultured to
a slant?
7. Condensation often gathers in the bottom of agar slants. Why is it important in this exercise to limit
condensation on plates but not on slants?
8. Which separation method is not appropriate for use with cultures containing a great deal of bacterial
growth? Why is this method not a good choice for these conditions?
9. Why is agar cooled to 50°C prior to being inoculated with bacteria? What would happen if the agar were
significantly warmer or cooler when inoculated?
10. How could you identify a potential contaminant on a streak plate? A pour plate? A spread plate?
11. How would any of the the isolation techniques seen in this laboratory exercise be affected by the use of
selective medium?
In: Biology
1. Why was it important in this case to identify Salmonella Typhi in the feces of the restaurant worker?
Wouldn’t the discovery of any bacterium be adequate?
2. Which of the three isolation techniques in this exercise would have been least suited to the isolation of
Salmonella Typhi in this case? Why?
3. MacConkey agar is a selective medium that only allows certain types of bacteria to grow. How could
the use of MacConkey agar has simplified the isolation of Salmonella Typhi in this case?
4. Thinking through the case, other than the restaurant workers, when else was microbiological
sampling likely used?
In: Biology