Homework Answers
The correct answer is-
D- water molecules would otherwise form cage like structures around the hydrocarbon chains, decreasing entropy.
This is because when non-polar compounds are introduced, water molecules form hydrogen-bonded, cage-like structures around them. This leads in imposing considerable loss of freedom on those water molecules and consequently reducing the entropy of the system.
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QUESTION 8 When phospholipids are mixed with water, they spontaneously form lipid bilayers. Why is this...
Question 9 (1 point) Why do lipid bilayers form spontaneously? The process is energetically favourable. The...
Question 9 (1 point) Why do lipid bilayers form spontaneously? The process is energetically favourable. The process decreases entropy. The process is exothermic. The process is endothermic.
19 When NaCl dissolves in water, aqueous Na+ and Clions result. The force of attraction that...
19 When NaCl dissolves in water, aqueous Na+ and Clions result. The force of attraction that exists between Na+ and H2O is called a(n) _ interaction. (A) Hydrogen Bonding (B) Dipole-dipole forces (C) London Dispersion/Van der Waals Forces . Ion-Dipole 20 Which of the following is true if a molecule possesses hydrogen bonding? (A) the molecule will be an ionic crystal lattice structure where there are strong electrostatic (B) the molecule will have a hydrogen bonded directly to an N,...
8:56 7 Expert Q&A Done refering a pic o fthedructure d ify the bal in the...
8:56 7 Expert Q&A Done refering a pic o fthedructure d ify the bal in the membrane lipid (22 points) Assume a biological membrane is composed solely of the following membrane lipid: OH (a) Is this membrane lipid considered a phosphoglyceride or sphingolipid? Justify your choice by referencing a specific component of the lipid structure. (b) Identify the alcohol in the membrane lipid: (c) Identify one change that could be made to the structure of the membrane lipid above in...
1. Which of the following amino acids has the most hydrophobic side chain? a). E b)....
1. Which of the following amino acids has the most hydrophobic side chain? a). E b). F c). S d). W e). Y 2. Which type of non covalent interaction would you expect to be present between Cl- and H2O? a). Ionic interactions ("salt links") b). Hydrogen bonds c). Van der Waals interactions d). Ion-dipole interactions For the first question, I have F and W both being hydrophobic chains but am unsure why or how to tell which one would...
Part B Soaps form micelles when added to water and can be used to remove dirt...
Part B Soaps form micelles when added to water and can be used to remove dirt or grease from surfaces. The dirt or grease molecules get trapped inside the micelle and can be easily washed away using water. Micelles de Water Which of the following statements are correct concerning the use of soap to remove dirt or grease from an object? Check all that apply. View Available Hint(s) The nonpolar end of the soap attracts the water molecules surrounding it....
10. Rank the following in the order of increasing solubility in water a triacylglycerol, a diacylglycerol,...
10. Rank the following in the order of increasing solubility in water a triacylglycerol, a diacylglycerol, and a monoacylglycerol, all containing palmitic acid. 11. A mixture of lipid is applied to a silica gel column and then the column is washed with increasingly polar solvents. The mixture contains palmitate, phosphotidylserine, cholesterol, and phosphotidyl ethanolamine. Predict the order of lipids eluted from the column. Explain. 12. Can a pure sample of cholesterol form an artificial bilayer when mixed with water? A)...
QUESTION 1 To study how proteins fold, scientists must be able to purify the protein of...
QUESTION 1 To study how proteins fold, scientists must be able to purify the protein of interest, use solvents like urea to denature the folded protein, and observe the process of refolding at successive time points. What is the effect of the solvents used in the denaturation process? a. The solvents break all noncovalent interactions. b. The solvents break all covalent interactions. c. The solvents create a new folded conformation. d. The solvents break some of the noncovalent interactions, resulting...
30 Chapter 4 Water SELF-TEST Do You Know the Terms? ACROSS Describes a solution with a...
30 Chapter 4 Water SELF-TEST Do You Know the Terms? ACROSS Describes a solution with a IH jor Hydro molecules can form energetically favorable interactions with 6. Water is often referred to as the because of its ability to hydrate molecules and screen Describes the concentration (and therefore of OH in an aqueous 8. The ion product of water, it is 1 x M in aqueous solutions at 25 C. 9, The describes the relationship between pH and the pk.of...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic acid (pK,-3.86) and 0.050 M sodium lactate 1: The aqueous environment of cells: A. Is generally irrelevant to biochemical structures and processes B. Serves as a source of energy for biochemical A. 3.16 B. 4.56 processes С. 3.82 D. 3.9 C. Provides an appropriate context for polar molecules and H-bonding that are critical for life D. Allows biochemical molecules to move freely in solution...
QUESTION 2 A H-atom bonded to O atom (such as in water) can also form an...
QUESTION 2 A H-atom bonded to O atom (such as in water) can also form an intermolecular bond with which of the following atom(s): Select all that apply A. C B. N C. O D. F The boiling points of hydrides of group-6 is shown below. The general trend of increasing boiling point with increasing molecular weight can be observed for H2S, H2Se and H2Te. The boiling point of H2O is unusually high and is 100 Celsius, The reason for...
Question 9 (1 point) Why do lipid bilayers form spontaneously? The process is energetically favourable. The process decreases entropy. The process is exothermic. The process is endothermic.
19 When NaCl dissolves in water, aqueous Na+ and Clions result. The force of attraction that exists between Na+ and H2O is called a(n) _ interaction. (A) Hydrogen Bonding (B) Dipole-dipole forces (C) London Dispersion/Van der Waals Forces . Ion-Dipole 20 Which of the following is true if a molecule possesses hydrogen bonding? (A) the molecule will be an ionic crystal lattice structure where there are strong electrostatic (B) the molecule will have a hydrogen bonded directly to an N,...
8:56 7 Expert Q&A Done refering a pic o fthedructure d ify the bal in the membrane lipid (22 points) Assume a biological membrane is composed solely of the following membrane lipid: OH (a) Is this membrane lipid considered a phosphoglyceride or sphingolipid? Justify your choice by referencing a specific component of the lipid structure. (b) Identify the alcohol in the membrane lipid: (c) Identify one change that could be made to the structure of the membrane lipid above in...
Part B Soaps form micelles when added to water and can be used to remove dirt or grease from surfaces. The dirt or grease molecules get trapped inside the micelle and can be easily washed away using water. Micelles de Water Which of the following statements are correct concerning the use of soap to remove dirt or grease from an object? Check all that apply. View Available Hint(s) The nonpolar end of the soap attracts the water molecules surrounding it....
10. Rank the following in the order of increasing solubility in water a triacylglycerol, a diacylglycerol, and a monoacylglycerol, all containing palmitic acid. 11. A mixture of lipid is applied to a silica gel column and then the column is washed with increasingly polar solvents. The mixture contains palmitate, phosphotidylserine, cholesterol, and phosphotidyl ethanolamine. Predict the order of lipids eluted from the column. Explain. 12. Can a pure sample of cholesterol form an artificial bilayer when mixed with water? A)...
30 Chapter 4 Water SELF-TEST Do You Know the Terms? ACROSS Describes a solution with a IH jor Hydro molecules can form energetically favorable interactions with 6. Water is often referred to as the because of its ability to hydrate molecules and screen Describes the concentration (and therefore of OH in an aqueous 8. The ion product of water, it is 1 x M in aqueous solutions at 25 C. 9, The describes the relationship between pH and the pk.of...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic acid (pK,-3.86) and 0.050 M sodium lactate 1: The aqueous environment of cells: A. Is generally irrelevant to biochemical structures and processes B. Serves as a source of energy for biochemical A. 3.16 B. 4.56 processes С. 3.82 D. 3.9 C. Provides an appropriate context for polar molecules and H-bonding that are critical for life D. Allows biochemical molecules to move freely in solution...
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