1. Glucokinase and hexokinase perform the same enzymatic function yet their role in carbohydrate metabolism / homeostasis is substantially different. a. Describe their cellular distribution / locations, functions, enzyme kenetics, and their regulation of each. b. Describe how each contributes to glucose homeostasis. c. Describe how insulin and glucagon may regulate these two enzymes. 2. The liver is centrally involved in the regulation of blood glucose levels. a. Describe what and how the liver contributes to glucose levels in both fed and fasted states b. Describe the molecular sources of substrates for glucose production. It is important to discuss the cellular source of these molecules as well as the physiological conditions in which they would be produced. c. Explain how and why blood glucose concentrations become dis-regulated during both fed and fasted states with type II diabetes.

A direct titration of .68311 grams sample of diprotic acid (H2X) requires 37.45 ml of 0.1372M NaOH solution. What is the experimental molecular weight of this organic acid: H2X+ 2NaOH -------->Na2X + 2H2O

1. How do polypeptides have the following types of effects: autocrine, paracrine, and endocrine

2. If you experimentally increase the concentration of Na+ outside a cell while maintaing other ion concentrations as they were, what would happen to the cell's membrane potential? Can you please exaplin why?

a - membrane potential would increase b - membrane potential would decrease c - membrane potential would be unaffected d - depends on thermodynamy potential

levels of protein structure

Find the ph for 0.350M of RbF

Calculate the pH of each of the following solutions. (Assume that all solutions are at 25°C.)

(a)    0.145 M acetic acid (HC₂H₃O₂, K_a = 1.8 ✕ 10⁻⁵)

(b)    0.145 M sodium acetate (NaC₂H₃O₂)

(d)    0.145 M HC₂H₃O₂ and 0.145 M NaC₂H₃O₂

_{hey so these are really stumping me, any heelp is appreciated, but it'd really be great if you could take a photo ofyour work done please so i can learn how it's done.. i keep getting it wrong}

10 mL of bleach with an unknown concentration is added to a 100mL volumetric flask. The solution is then finished with deionized water. 10 mL of this diluted bleach solution is then added to an erlenmeyer flask along with 1 scoop of KI, and 5 L of 2M HCl. This solution is then titrated with Na2S2O3 until it is a pale yellow color, then a starch indicator is added and titration is completed until the solution is clear. If 43 mL of Na2S2O3 was required, what is the percent of sodium hypochlorite in the bleach? How would it be calculated? A step by step answer would be very much appreciated.

NaOCL + 2HCl --> NaCl + H2O + Cl2

Cl2 + 2I- --> I2 +2Cl-

2S2O3^2- +I2 --> S4O6^2- +2I-

The boiling point of an aqueous solution is 101.42 °C. What is the freezing point?

1. You may have already noticed that the shape of your spectrophotometric titration curve is quite different than the shapes of the potentiometric titration curves which you have constructed in earlier experiments. Why? (HINT: Think about the mathematical relationships between pH and concentration and absorbance and concentration . . .).

2. When performing a potentiometric titration it is very important to make a large number of measurements near the endpoint, while for a spectrophotometric titration one actually ignores the measurements obtained near the endpoint. Explain.

3. In order for a photometric method to be used for a titration, what requirement(s) must be met by the titration system?

Calculate the Ecell value at 298K for the cell based on the reaction

Fe³⁺(aq)+ Cr²⁺(aq) --> Fe²⁺(aq)+Cr³⁺(aq)

when [Fe³⁺] = [Cr²⁺] = 1.50x10^-3 M and [Fe²⁺]= [Cr³⁺] = 2.5x10^-4 M?

10.00mL 5% acidity vinegar was used titrate with NaOH whose molarity is 0.1030M.

Exp. #	Concentration of NaOH	Initial volume of NaOH	Final volume of NaOH	Volume of NaOH used for titration
1	0.1030M	5.50mL	21.65mL	16.15mL
2	0.1030M	3.60mL	19.00mL	15.40mL
3	0.1030M	19.00mL	35.91mL	16.91mL

The vinegar was diluted to make 100.00mL final volume before trtration. If the molar mass of acetic acid is 60.05g/mole and density is 1.00 g/mL. Calculate the mass percent of acetic acid in the original vinegar solution.

A 20.0 mL sample of 0.432 M HBr is titrated with a 0.314 M NaOH solution. The pH after the addition of 35.0 mL of NaOH is __________.

A.0.04
B.1.37
C.12.53
D.12.63
E.13.33

I have an unknown mixture of Benzoic acid, Dimethyl Terephthalate, and Naphthalene dissolved in Dichloromethane. I need to separate the mixture to find the composition using some sort of acid base reation and a distillation. How would I do that? I think that I could use steam distillation to remove the naphthalne but im not really sure on that. Any help would be apprectiated. I start with 25mL of the unknown mixture.

A sample of solid magnesium is heated with an electrical coil. If 165 Joules of energy are added to a 14.5 gram sample initially at 24.3°C, what is the final temperature of the magnesium?

A sample of liquid water is heated with an electrical coil. If 1.04×10³ Joules of energy are added to a 13.2 gram sample initially at 20.7°C, what is the final temperature of the water?