reyesaljon.0404

1. Explain  transport system across the cell membrane.

what is biology?

Which animal dies by drinking water?

1. In a hospital laboratory, a 10.0mL sample of gastric juice, obtained several hours after a meal, was titrated with 0.1M NaOH to neutrality; 2mL of NaOH was required. The patient’s  stomach  contained no ingested food or drink, thus assume that no buffers were present. What was the pH of the gastric juice?

1. In a 0.1 m solution of glycine at pH 9.0. what fraction of glycine has its amino group in the –NH3+ form?

1. How much 5 m KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0?

How many moles are present in 10g of Na2SO4

1. In order to have 99% of the glycine in its –NH3+ form, what must the numerical relation be between the pH of the solution and the pKa of the amino group of glycine?

1. Why does ice melt when salt is sprinkled on it?

1. When a piece of paper is wet with water, it tears off easily. But the same paper if soaked in oil doesn’t lose strength. Why?

1. When glucose is added and stirred, the water feels cooler. Why?

1. Metabolic alkalosis is a condition in which the blood pH is higher than its normal value of 7.40 and can be caused, among other reasons, by an increase in [HCO3-]. If a patient has a following blood values, pH= 7.45, [CO2]=1.25 mM, What is the [HCO3-]? The pk1 for the bicarbonate/carbonic acid system is 6.1. How does the calculated Value of bicarbonate compare with the normal value?

1. A polysaccharide of unknown structure was isolated, subjected to exhaustive methylation, and hydrolyzed. Analysis of the products revealed three methylated sugars: 2,3,4-tri-O-methyl-D-Glucose, 2,4-di-O-methyl-D-glucose and 2,3,4,6-tetra-O-methyl-D-glucose, in the ratio 20:1:1. What is the structure of the polysaccharide?

1. The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein. How can curls be induced?

How do depilatory creams remove hair?

1. Using known endo- and exopeotidase, suggest a pathway for the complete degradation of the following peptide:

His-Ser-Lys-Ala-Trp-Ile-Asp-Cys-Pro-Arg-His-His-Ala

A protein biochemist attempted to determine the amino acid sequenceof a decapeptide. Use the results from the trypsin, chymotrypsin,and cyanogen bromide treatments to suggest the amino acid sequenceof this decapeptide.

Trypsin digestion gave two fragments, containing the followingresidues (not in order):

T1: Ala, Arg, Phe, Pro, Thr, Trp, Tyr
T2: Lys, Met, Val

Chymotrypsin digestion gave three fragments with the followingresidues (not in order):

CT1: Ala, Arg, Phe, Pro
CT2: Thr, Trp
CT3: Lys, Met, Tyr, Val

N-terminal analysis of the CT1 tetrapeptide indicated that theN-terminal amino acid was Ala.

The cyanogen bromide gave only one single amino acid, methionine,and a nonapeptide.

What is a possible sequence of the decapeptide? Use three-letterabbreviations in your answer, and add dashes betweenresidues

1. After proper purification, the Edman reaction was used to sequence a dodecapeptide. The following data were obtained. The C-terminal amino acid is isoleucine; N-terminal amino acid is methionine; peptide fragments are Ala-Ala-Ile, Leu-Arg-Lys-Lys-Glu-Lys-Glu-Ala,  Met-Gly-Leu, and Met-Phe-Pro-Met. What is the sequence of this peptide?

1. Why are the most unsaturated fatty acids found in phospholipids in the cis rather than the trans confirmation? Draw the structure of a 16-carbon fatty acid as saturated, trans monosaturated, and cis

1. The melting points of a series of 18-carbon fatty acids are stearic acid, 69.60C, oleic acid, 13.40C; linoleic acid -50C; and linolenic acid, -110 What structural aspect of these 18-carbon fatty acids can be correlated with the melting point? Provide a molecular explanation for the trend in melting points.

1. Why do phenyls and Dettol turn water milky-white when mixed with it?

• Why does a wound on tongue heal faster than those on the other parts of the body?

What is antibiotics factors

Question 12.12. Which of the following describes a protein function from within the human body? (Points : 4)

While proteins are best known as a principal structural component of our muscle mass, they are in fact critical components of all tissues of the human body.

As enzymes, proteins function in metabolism by controlling all chemical reactions in the human body.

As antibodies, proteins are a key component of the human immune system.

Although our bodies prefer to use carbohydrates and fats for energy, proteins secondarily can be used as an energy source. \

All of the above describe a protein function within the human body.

The major element that our human body made up of?

Answer is pi/9... please explain!!

Evaluate the triple integral

Evaluate the triple integral 

triple integral(omega) of (-x-3y+z)dV,

where omega is bounded by x^2+y^2+z^2=16, z>= (sqrt(x^2+y^2))/3 

I=?

Solve the differntial equation subject to the initial conditions.

Solve y'' + 2y' + y = cos(x) + 3 subject the initial conditions y(0) = 0 and y'(0) = 1

8. Evaluate the line integral R
C
(xy + y + z)ds along the curve r(t) = 2ti + tj + (2 − 2t)k, 0 ≤ t ≤ 1

If someone can help me, I’d very much appreciate it.

Look at the following list. You will see the names of people, dates, legislation, speeches, and terms. Each item on the list has something to do with segregation in United States history. Place each item on a timeline and write a brief paragraph about each explaining its relation to segregation history. Your descriptive statement will describe how it fits on the timeline.

You may create your timeline electronically with presentation or word processing software. Include a picture to support each item and your statement.  At the end of your presentation, write a few paragraphs explaining what you learned about segregation in America and how each of the items on the list connects to the history of segregation and each other.  Each item is worth 4 points (3 points for a quality description and 1 point for a relevant image).  The concluding analysis is worth 10 points.

1 . Sundown Towns

2. Civil Rights Acts of 1964 and 1968

3. White flight and Penick v. Columbus Board of Education

4. August 28, 1963 speech in Washington, D.C.

5. Supreme Court decision in 1954

6. Federal Civil Service in 1913

7. Greensboro Sit-in

8. Jonathon Kozol's Amazing Grace

9. Proposition 14 in California

10. Shelley v. Kraemer

Submit your completed project to the Project: Timeline of Racial Segregation in America dropbox for grading.

1. X-10=6
2.  +10=+10
3. X=6+10
4. X=16

To estimate the number of sheathing panels needed for a building with dimensions of 40 feet by 60 feet, we first need to determine the total surface area to be covered by the sheathing.

The total surface area of the building can be calculated by finding the sum of the areas of all sides. Assuming the building has four walls and a flat roof, the calculation would be as follows:

Wall area = 2 * (length * height) = 2 * (40 ft * 60 ft) Roof area = length * width = 40 ft * 60 ft

Total surface area = Wall area + Roof area = 2 * (40 ft * 60 ft) + (40 ft * 60 ft) = 4800 ft² + 2400 ft² = 7200 ft²

Now, we need to consider the size of the sheathing panels. Common sheathing panels for buildings are typically 4 feet by 8 feet in size.

To estimate the number of panels needed, we divide the total surface area by the area covered by a single panel:

Number of panels = Total surface area / Area covered by a single panel = 7200 ft² / (4 ft * 8 ft) = 7200 ft² / 32 ft² = 225 panels (approximately)

Therefore, an estimated 225 sheathing panels would be needed for a building with dimensions of 40 feet by 60 feet, assuming standard 4 feet by 8 feet panels.

Find y'' for

y = 8x⁴e^5x.

Do you think the United States government does too much or not enough to help its citizens?  The issue of taxation is often contentious in our country. Some think taxes are our moral responsibility. In our capitalist society, some people believe that social welfare programs organized by the government to help people in need are simply "handouts" and do not create incentives for people to provide for themselves.

Would you be surprised to learn that examples of "taxation" exist even in the animal kingdom?  Read an amusing article from the New York Times to see how taxation is not just a human practice. (Or use the following keywords in an online search: NY times taxing a ritual to save the species)

What do you think?

• What role should the government have in supporting its citizens?  Is it the moral responsibility of the government to provide health care and education for all?  Should these services be strictly limited to the private sector? Why?

• Should the United States government provide more support through social welfare programs or less? Why

• Should the government increase taxes to pay for increased services or should current tax revenues be redistributed?  Where do you think the government should cut spending to support additional social programs? Why?

• Do you think any limitations should be made to the social services that are provided?  Why or why not?

Monthly Goals: Calls per Hour (Calls/Hr) ≥

11,500, Customer Service Score (CS Score) ≥ 87,

Job Satisfaction (Job Sat.) ≥ 92, Escalations (Esc.)

≤ 10, Resolutions (Res.) ≥ 91

Which metric would you focus on improving?