Increasing the degree of polymer chain entanglement in a hydrogel would likely A. slow down release...
Increasing the degree of polymer chain entanglement in a hydrogel would likely
A. slow down release
B. speed up rate of chain relaxation
C. make the hydrogel less stable
Homework Answers
A. slow down release --------------- is correct answer.
As the degree of effective cross-links in the hydrogel is increased, the network mesh size and degree of swelling is significantly reduced. As a result, if hydrogels are used as a drug carriers, the rate of drug release will decrease dramatically upon the formation of interpolymer complexes.
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Increasing the degree of polymer chain entanglement in a
hydrogel would likely
A. slow down release...
1 A highly crystalline polymer would probably make a good hydrogel. True False 2. A simple hydrog...
1 A highly crystalline polymer would probably make a good hydrogel. True False 2. A simple hydrogel loaded with a drug solution and implanted in the body will most likely exhibit drug release kinetics. zero-order sustained instantaneous pulsatile
1 A highly crystalline polymer would probably make a good hydrogel. True False 2. A simple hydrogel loaded with a drug solution and implanted in the body will most likely exhibit drug release kinetics. zero-order sustained instantaneous pulsatile
26. Based on our discussion in class, high levels of NADH would likely A. cause pellagra...
26. Based on our discussion in class, high levels of NADH would likely A. cause pellagra B. stimulate glycolysis C. slow down the movement of molecules through the citric acid cycle D. slow down oxidative phosphorylation E. break down carbohydrates 27. What purpose does fermentation serve? A. It regenerates NAD* from NADH to keep glycolysis going in the absence of oxygen. B. It allows for the production of NADH, which keeps the electron transport chain going. C. It produces an...
How would you expect the operation of the citric acid cycle to respond to a rapid...
How would you expect the operation of the citric acid cycle to respond to a rapid increase in the [NADH]/[NAD) ratio in the mitochondrial matrix? a. The CAC rate would not change b. The CAC would speed up C. The CAC would slow down/stop d. There is not enough information provided.
6. Which of the following amino acid residues would provide a side chain capable of increasing...
6. Which of the following amino acid residues would provide a side chain capable of increasing the hydrophobicity of a binding site? A) aspartic acid B) lysine C) isoleucine D) arginine E) serine 7. Consider a hypothetical hemoglobin with a Hill coefficient of 1 and the same pso value as normal hemoglobin. Choose the statement below that best describes the two proteins. A) There is a cooperative interaction between oxygen-binding sites in both the hypothetical and normal hemoglobins. B) The...
10) Would an amino acid with the given side chain be most likely found in the hydrophobic or hydrophilic region of a pr...
10) Would an amino acid with the given side chain be most likely found in the hydrophobic or hydrophilic region of a protein? -CH-CH3 он CH2-CH-CH3 он CH3 11) What process occurs when heat, acids, bases, and heavy metal ions cause loss of biological function of a protein? 12) Answer the following questions regarding enzyme activity: a) The optimum temperature and pH for most biological enzymes is b) The molecules to which an enzyme binds are called the c) The...
When a roller coaster went upside down at the top of a loop with a radius...
When a roller coaster went upside down at the top of a loop with a radius 8.0m, a speed of 11.2m/s was required to make the coaster feel safe. A. Assuming that air resistance and friction are negligible , what speed will the roller coaster have when it is right-side up at the bottom of the loop? B. The roller coaster begins its trip by being pulled up the lift hill by a chain lift and dropped after it reaches...
5. In the Keynesian model which of the following would be most likely to have the largest impact on aggregate demand a. an increase in the money supply b. a change in government expenditure c. a chan...
5. In the Keynesian model which of the following would be most likely to have the largest impact on aggregate demand a. an increase in the money supply b. a change in government expenditure c. a change in investment expectations d. both a and c e. both b and c 6. In the Keynesian theory of liquidity demand and the interest rate which of the following occurs during excess supply of money. a. individuals sell bonds, driving interest rates down...
In a period of rising costs, which inventory valuation method would a company likely choose if...
In a period of rising costs, which inventory valuation method would a company likely choose if they want to have the highest possible balance of inventory on the balance sheet? Weighted-average cost. B) FIFO. C) LIFO. D) Periodic. Which of the following is a negative sign that a company is not selling its inventory quickly? A high inventory turnover ratio. Both a high inventory turnover ratio and a low average days in inventory. A low average days in inventory. A...
QUESTION 1 1 points A person that is first exposed to a new cold virus would...
QUESTION 1 1 points A person that is first exposed to a new cold virus would not feel better for about 7 days because: The inflammatory response that amplifies the immune response is slow-acting. It takes about one week for pro-inflammatory cytokines to call neutrophils to the site of infection. c. It takes up to two weeks to stimulate memory B and T cells. There are no memory cells to be called upon, and therefore the primary d. immune response...
Randall is driving down a long steep hill (18°) at a steady 12.4 m/s? A. What...
Randall is driving down a long steep hill (18°) at a steady
12.4 m/s?
A. What is his velocity after 5.7 second of driving?
B. What is his velocity in the x and y directions?
C. How far up the hill does he drive in 5.7 seconds?
D. What is his vertical displacement in those 5.7
seconds?
For each question be sure to do the Prepare step: visual representation with variables and axes, collect known values, identify unknown quantities. 1....
1 A highly crystalline polymer would probably make a good hydrogel. True False 2. A simple hydrogel loaded with a drug solution and implanted in the body will most likely exhibit drug release kinetics. zero-order sustained instantaneous pulsatile
1 A highly crystalline polymer would probably make a good hydrogel. True False 2. A simple hydrogel loaded with a drug solution and implanted in the body will most likely exhibit drug release kinetics. zero-order sustained instantaneous pulsatile
26. Based on our discussion in class, high levels of NADH would likely A. cause pellagra B. stimulate glycolysis C. slow down the movement of molecules through the citric acid cycle D. slow down oxidative phosphorylation E. break down carbohydrates 27. What purpose does fermentation serve? A. It regenerates NAD* from NADH to keep glycolysis going in the absence of oxygen. B. It allows for the production of NADH, which keeps the electron transport chain going. C. It produces an...
How would you expect the operation of the citric acid cycle to respond to a rapid increase in the [NADH]/[NAD) ratio in the mitochondrial matrix? a. The CAC rate would not change b. The CAC would speed up C. The CAC would slow down/stop d. There is not enough information provided.
6. Which of the following amino acid residues would provide a side chain capable of increasing the hydrophobicity of a binding site? A) aspartic acid B) lysine C) isoleucine D) arginine E) serine 7. Consider a hypothetical hemoglobin with a Hill coefficient of 1 and the same pso value as normal hemoglobin. Choose the statement below that best describes the two proteins. A) There is a cooperative interaction between oxygen-binding sites in both the hypothetical and normal hemoglobins. B) The...
10) Would an amino acid with the given side chain be most likely found in the hydrophobic or hydrophilic region of a protein? -CH-CH3 он CH2-CH-CH3 он CH3 11) What process occurs when heat, acids, bases, and heavy metal ions cause loss of biological function of a protein? 12) Answer the following questions regarding enzyme activity: a) The optimum temperature and pH for most biological enzymes is b) The molecules to which an enzyme binds are called the c) The...
5. In the Keynesian model which of the following would be most likely to have the largest impact on aggregate demand a. an increase in the money supply b. a change in government expenditure c. a change in investment expectations d. both a and c e. both b and c 6. In the Keynesian theory of liquidity demand and the interest rate which of the following occurs during excess supply of money. a. individuals sell bonds, driving interest rates down...
QUESTION 1 1 points A person that is first exposed to a new cold virus would not feel better for about 7 days because: The inflammatory response that amplifies the immune response is slow-acting. It takes about one week for pro-inflammatory cytokines to call neutrophils to the site of infection. c. It takes up to two weeks to stimulate memory B and T cells. There are no memory cells to be called upon, and therefore the primary d. immune response...
Randall is driving down a long steep hill (18°) at a steady
12.4 m/s?
A. What is his velocity after 5.7 second of driving?
B. What is his velocity in the x and y directions?
C. How far up the hill does he drive in 5.7 seconds?
D. What is his vertical displacement in those 5.7
seconds?
For each question be sure to do the Prepare step: visual representation with variables and axes, collect known values, identify unknown quantities. 1....
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