# Hemoglobin and myoglobin are very similar proteins in that they both

Get college assignment help at uniessay writers Hemoglobin and myoglobin are very similar proteins in that they both carry oxygen. However, hemoglobin is a tetrameric protein (actually a dimer of dimers); whereas, myoglobin is a monomeric protein. This difference is very important to how these two proteins function. Hemoglobin shows positive cooperativity with oxygen binding. Most proteins that show cooperativity are multisubunit proteins. The cooperativity of these proteins can be explained by the “Sequential Model, or the Symmetry Model. However, there can be single subunit proteins that show cooperative binding of substrate molecules. Obviously, the two models mentioned above can not be used to explain this type of cooperativity. Present a model that could explain this type of cooperativity. Be sure that your model is fully justified

## Magnesium reacts with HCl to produce magnesium chloride and hydrogen gas.

Magnesium reacts with HCl to produce magnesium chloride and hydrogen gas. What is the molarity of the HCl solution if 310 mL of the HCl solution reacts with magnesium to produce 7.40 L of Hydrogen gas measured at STP?

## A 1.994g sample of ethanol, CH3CH2OH is combusted in a bomb

A 1.994g sample of ethanol, CH3CH2OH is combusted in a bomb calorimeter. The temperature of the calorimeter increases by 10.91. If the heat capacity of the bomb is 615.5j/k and it contains 1.150kg of water, what is the enthalpy chnge per mol of ethanol combusted?

## how many grams are required to prepare a 1.50m NaCl solution

how many grams are required to prepare a 1.50m NaCl solution using 45.5 grams of NaCl?

## What masses of Glauber’s salt must be used to provide 6

What masses of Glauber’s salt must be used to provide 6 of sodium sulfate?

## What masses of Glauber’s salt must be used to provide 10

What masses of Glauber’s salt must be used to provide 10 mol of sodium sulfate?

## Suppose that the microwave radiation has a wavelength of 12 cm

Suppose that the microwave radiation has a wavelength of 12 cm . How many photons are required to heat 235 mL of coffee from 25.0 degrees Celsius to 62.0 degrees Celsius? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this temperature range.

## Suppose that the microwave radiation has a wavelength of 11.6cm .

Suppose that the microwave radiation has a wavelength of 11.6cm . How many photons are required to heat 225 mL of coffee from 25.0 C to 62.0C ? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 , as water over this temperature range. Express the number of photons numerically.

## 3. The half-life of radon-222 is 3.824 days. After what time

3. The half-life of radon-222 is 3.824 days. After what time will one-fourth of a given amount of radon remain?

## Consider 1.00L of air in a patients lungs at 37 degrees

Consider 1.00L of air in a patients lungs at 37 degrees Celcius and 1.00 atm pressure. What volume would this air occupy if it were at 25 degrees Celcius under a pressure of 5.00 x 10^2 atm?

## The successive ionization energies of a certain element are I1 =

Get college assignment help at uniessay writers The successive ionization energies of a certain element are I1 = 589.5 kJ/mol, I2 =1145 kJ/mol, I3= 4900 kJ/mol, I4 = 6500 kJ/mol, and I5 = 8100 kJ/mol. This pattern of ionization energies suggests that the unknown element is

## It takes 53.0 J to raise the temperature of an 10.7g

It takes 53.0 J to raise the temperature of an 10.7g piece of unknown metal from 13.0 degrees celsius to 25.0 degrees celsius. What is the specific heat for the metal?

## What is the wavelength of radiation of fre- quency 4.80 ×

What is the wavelength of radiation of fre- quency 4.80 × 1013 s−1?

## State the charge on the cation in each CuBr2

State the charge on the cation in each CuBr2

## Which of these is likely to be the best conductor of

Which of these is likely to be the best conductor of electricity? (Points: 1) a sample of tap water a sample of ocean water a solution of ethanol (C2H5OH) and water a quantity of pure water (100% H2O)

## What is the pH of 1M Na3A of pKa1= 2, pKa2=

What is the pH of 1M Na3A of pKa1= 2, pKa2= 6, and pKa3= 10 for the triprotic acid H3A? The answer is: pH = 12, but I am not sure how to solve this.. Can you help?

## Magnesium hydroxide is 54.87% oxygen by mass. How much oxygen is

Magnesium hydroxide is 54.87% oxygen by mass. How much oxygen is in 221 g of the compound?

## Which of the following correctly represents the ionization of an atom?

Which of the following correctly represents the ionization of an atom? a) Cl(g) e- -> Cl-(g) b) Na(g) -> Na (g) e- c) Na(s) – e- -> Na (g) d) Cl2(g) -> 2Cl(g)

## Sodium azide (NaN3), the explosive compound in automobile air bags, decomposes

Sodium azide (NaN3), the explosive compound in automobile air bags, decomposes according to the equation: 2NaN3(s) → 2Na(s) 3 N2(g) What mass of sodium azide is required to provide the nitrogen needed to inflate a 75.0L bag to a pressure of 1.3 atm at 25°C.?

## A kilogram of aluminum metal and a kilogram of water are

A kilogram of aluminum metal and a kilogram of water are each warmed to 75 C and placed in two identical insulated containers. One hour later, the two containers are opened and the temperature of each substance is measured. The aluminum has cooled to 35C while the water has cooled only to 66C. Explain the difference

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