Which of the following acids would be most suitable for preparing a buffer of pH 3.10 and why: hydrogen peroxide (pKa= 11.65), propanoic acid (pKa=4.874), cyanoacetic acid (pKa= 2.472), and 4-aminobenzenesulfonic acid (pKa=3.232)?

Some scientists believe that fructose is particularly bad for human health because it promote fat synthesis, contributing to development of type II diabetes and fatty liver disease. You are a scientist working for a lab attempting to develop a drug to help with such diseases called fructono. The idea is that fructono could be added to the diet to reduce fructose absorption; even though fructono would be absorbed, it would not be metabolized, and would be excreted by the kidney. The hypothesis is that fructono binds to the fructose transporter, competitively displacing fructose. This cannot be easily studied in humans, so you are investigating this hypothesis with a mouse small intestine, which is known to transport fructose using a transporter that is quite similar in amino acid sequence and structure to the human protein. For your research, you set up a perfused intestine prep. You cut out about 1 cm of small intestine, and put it in a dish containing saline. You insert a tube into the intestinal section, and use a pump to push any fluid you want through the lumen of the intestine. You have radio-labeled fructono, so you can measure its appearance in the saline outside the intestine. How can you measure the rate of transport of fructono? 1 pt Describe experiments that would test whether the absorption of fructono is protein-mediated vs. passive (just leaking through cracks, or diffusing through membranes). What results will you get if the transport is protein-mediated vs. passive? 2 pts. Describe experiments that would test whether the absorption of fructono is active, and the predicted results if transport is active or not. 2 pts. Describe experiments that will test whether the active transport of fructono requires luminal Na+, and the predicted result if transport is Na+-dependent or not. 1 pt. Describe experiments that will test whether fructono can reduce the transport of fructose in a dose-dependent manner. 2 pts What side-effects might fructono have? 2 pts

Tableau DA 10-2: Exercise, Recording bond issuance and amortization LO P2

The founder of Frenza asks us to assist her in accounting and analysis of the corporation’s bonds, which have an annual contract rate of 8%. She wants to know the business and accounting implications of further debt issuances as she looks for ways to finance the growth of Frenza. The following Tableau Dashboard is provided to help us address her questions and provide recommendations for her business decisions.

1(a). Prepare journal entries to record the issuance of Frenza bonds on January 1, Year 1.
1(b). Prepare journal entries to record the first and second interest payments on June 30, Year 1, and December 31, Year 1.
1(c). Prepare journal entries to record the maturity of the bonds on December 31, Year 3.
2. Frenza needs to raise money to purchase new equipment. The founder is concerned about losing ownership control of her company. Which of the following ways to raise money would we recommend?
3. Frenza needs to raise money to purchase more inventory. The founder is concerned about the company’s ability to make required cash payments when cash flows are low. Which of the following ways to raise money would we recommend?

An enzyme is discovered that catalyzes the chemical reaction

SAD --> <-- HAPPY

A team of motivated researchers set out to study the enzyme, which they call happyase. Under a constant enzyme concentration, [E] of 2.0 uM, they studied the relationship between substrate concentration [SAD] and reaction velocity V₀. Their data is shown below:

[SAD] (uM)                V₀ (uMs^-1)      

20                    3.4 x 10³

40                   5.4 x 10³

60                   6.6 x 10³

80                    7.4 x 10³

Can you determine K_cat and K_m from the above data?

2. While [E] remains 2.0 um and [SAD] = 12 uM, what would the reaction velocity V₀ be?

3. In a separate happyase experiment using [E] = 1.0 uM, the reaction velocity, V_0, is measured as 3.6 x 10³ uMs^-1. What is the [SAD] used in this experiment?

4.The researchers working on happyase discovered that the compound STRESS is a potent inhibitor of happyase. A kinetics study of happyase in the presence of         1 nM STRESS, gives the following data:

[SAD] (uM)                V₀ (uMs^-1)      

20                    1.7 x 10³

40                   2.7 x 10³

60                    3.3 x 10³               

80                    3.7 x 10³

Which class of inhibitors does STRESS belong to?

Hi ,I need your answer today for all parts /a/b/c/d of these question below.Br/Ha

This question is about human capital accumulation in terms of on-the-job training.

a) Define general and firm specific human capital.

b) Discuss who pays for investments in human capital that leads to general human capital and to firm specific human capital.

C​alculate the volume of all gases evolved by the complete oxidation of 0.390 g of the amino acid alanine CH3CH(NH2) COOH if the products are liquid water. nitrogen gas, and carbon dioxide gas; the total pressure is 1.03 atm; and T=290k.

What happens when one base pair of DNA is lost from the coding region of a gene because of mutation? First explain how this would affect the mRNA sequence, and second, explain how this would alter the amino acid of the protein that is encoded.

Consider defects in the aromatic amino acid catabolism.

a) Why are patients with phenylketonuria not complete albinos?

b) Explain why an early diagnosis of phenylketonuria would be able to spare the patients from the deleterious

effects of the disease, while an early diagnosis of albinism would not.

“Protein A” is phosphorylated at one amino acid by a kinase, “protein B”, and dephosphorylated by a phosphatase, “protein C” You want to determine the mechanisms of protein B and C. What experimental information would you need in order to propose a reasonable mechanism? Explain.

1. Related to translation: Predict the amino acid sequence for the given template strand of DNA.

            3’- T A C G T T C A T A T C C G T A T G T A T A T T – 5’