Simplified diagrams of macromolecules are given. What is the function of the molecule of diagram C? (а) о-с-с-с-с-С-с Ос-с-с-с-с-с б-с-с-с-с--С (d) (c)
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- For the following tetrapeptide: CKSWa. Draw its complete protonic equilibria. Indicate the net charge of each form and encircle the zwitterionic form. b. Give the full name of the tetrapeptide. c. Calculate its IpH. d. If the tetrapeptide was subjected to electrophoresis using a buffer solution at pH 7, at which electrode it will migrate?For the tetrapeptide YIRG: a. Draw its complete protonic equilibria. Indicate the net charge of each form and encircle the zwitterionic form. b. Give the full name of the tetrapeptide. c. Calculate its IpH. d. If the tetrapeptide was subjected to electrophoresis using a buffer solution at pH 7, at which electrode it will migrate?. Two separate synthetic lipid membranes were prepared using palmitic acid and linoleic acid, singly in each. When both the membranes were tested for their transition temperatures, the one made of palmitic acid showed a higher value than the other. Analyse the situation (
- The properties of food gels depend on the type of molecules they contain and how they interact with each other. Select all the correct answers below (there may be more than one). Select one or more: a. The texture of a food gel may go from soft to hard depending on the number and strength of the bonds between the biopolymer molecules. O b. The appearance of a food gel depends on the size of the biopolymer building blocks (molecules or particles) compared to the wavelength of light. When the building block size is much lower than the wavelength of light, they appear transparent. O c. The water holding capacity (WHC) depends on the size of the pores in the biopolymer network. The smaller the pores, the greater the WHC. O d. The gelling mechanism, such as cold-set, heat-set, or salt- set gelation depends on the nature of the cross-links (for example, hydrogen bonds, hydrophobic bonds, or salt bridges)nzymes play a fundamental role in cell function. Regarding the biochemistry of enzymes, which of the following statements is correct? A. Most enzymes can bind and react with a wide range of different substrate molecules. B. Enzymes increase the rate of a spontaneous reaction by lowering the ΔG. C. Enzymes increase the enthalpy (H) of the products compared to the reactants. D. Enzymes increase the number of molecules that get to the transition state.. Explain what is meant by the term, “high energy compound”. Name a thioester molecule that is commonly found in biochemical reactions. Explain why thioesters are “high energy” compounds. Describe the molecular structure of cellulose. How does this structure explain why cellulose forms strong fibers? Explain why digestion of cellulose takes a long time even when catalyzed by an enzyme. The enzyme phosphofructokinase transfers a phosphate from ATP to the hydroxyl group a C1 of fructose. Similar to fructose, water also has a hydroxyl group and the concentration of water is much higher than that of fructose. Explain why the phosphate is transferred to fructose and not to water.
- How does the average reaction rate differ from an instantaneous reaction rate? © A. The average reaction rate is how quickly the reaction proceeds over time. An instantaneous reaction rate is how quickly the reaction proceeds at a specific time. B. The average reaction rate is how quickly the reaction proceeds at a specific time. An instantaneous reaction rate is how quickly the reaction proceeds over time. C. The average reaction rate is how quickly the reaction proceeds over time considering the reactants. An instantaneous reaction rate is how quickly the reaction proceeds at a specific time considering the products. D. The average reaction rate is how quickly the reaction proceeds over time. An instantaneous reaction rate is how quickly the reaction proceeds compared to another reaction.For the tetrapeptide KASE: a. Draw its complete protonic equilibria. Indicate the net charge of each form and encircle the zwitterionic form. b. Give the full name of the tetrapeptide. c. Calculate its IpH. d. If the tetrapeptide was subjected to electrophoresis using a buffer solution at pH 7, at which electrode it will migrate?3. Below is an image of sucrose. HO OH OH HO- HO OH OH НО (a) Using sucrose as a substrate, draw a schematic reaction for a general glycosidase. Explain whether your mechanism corresponds to an inverting or a retaining type enzyme. C :) (b) The two products can occur in a range of forms in solution. How many forms might you expect in this case, and explain how these interconvert. C 2
- 1. Calculate the pH of a 0.05 M solution of HCl. 2. Calculate the pH of a 0.1 M solution of NaOH. 3. Calculate the pH of an acetic acid solution in which [CH3COO - ] = 0.037 M and [CH3COOH] = 0.044 M. (pKa = 4.76) 4. You are conducting a biochemical experiment with an enzyme that has optimal activity at pH = 10.00. You decide to use carbonate (pKa1 = 6.38, pKa2 = 10.30) as the buffer to keep the pH stable throughout the enzymatic reaction. (Recall that the formula for carbonic acid is H2CO3.) You prepare a 0.5 M solution of carbonate buffer at pH = 10.00. Calculate the concentrations of the major carbonate species in your solution. 5. Calculate the pH of the buffer solution in which [H3PO4] = 0.038 M and [H2PO4 - ] = 0.046 M (pKa1 = 2.12, pKa2 = 7.21, pKa3 = 12.32). 6. Add 5.0 mL of 0.1 M NaOH to 80 mL of buffer from question 5 and calculate the pH.A. Give (3) open kinematic chain and (3) closed kinematic chain activity that you can do during the quarantine period. B. Suppose that you have a colleague in the company that is seated for 4 hours straight while working. Based on the basic kinetic concepts, what are the possible kinetic concepts that can be applied in the scenario? How? Give at least TWO.A group of BS Biology students were tasked to design and fabricate different synthetic cell membranes that could be used to simulate cellular activities of certain organisms. Below are the chemical structures of the compounds that are available to them: H2C-OH НС — ОН HO H2C-OH myristic acid glycerol НО alpha-linolenic acid HO-P-o OH orthophosphate HO NH2 sphingosine OH CH2OH NH3 CH2OH HO ethanolamine HO OH OH OH Но. lactose ("point of attachment) Given these compounds, help the students assemble the structure of the lipid constituent for the cell membrane appropriate to study the following. Briefly explain your answer. (Draw the structure) а. a thermophilic bacteria thriving in a hot spring b. a hepatocyte of a sea lion in the Arctic Ocean С. a frog neurocyte