Homework Answers
14. E. All of the above.
Similarity in sequence of proteins imparts similar structure and function and shows presence of evolutionary relationships.
15. C. The reaction is not energetically favourable and not occur in this case. As the free energy change is positive, the forward reaction will not happen without using any external encrypt from ATP.
16. C. As peptide bond has resonance structure , which imparts a partial double bond character, the peptide bonds are relatively stable and unreactive under physiological conditions.
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14. Proteins that have similar sequences are predicted to have... A. Similar structure B. Similar function...
8) Which of these illustrates structure-function relations? a) All animals have the same proteins b) The...
8) Which of these illustrates structure-function relations? a) All animals have the same proteins b) The molecular bonds in cellulose allow it to provide support to plants c) All organisms can inherit traits from their parents d) Energy can only flow through ecosystems e) All of the above 9) The virus that causes the common cold has this in common with HIV, the virus that causes AIDS: a) Envelope c) RNA e) All of the above b) DNA d) Capsid...
1) Select all that apply. Globular proteins: a)are found in hair and wool. b)include myoglobin and...
1) Select all that apply. Globular proteins: a)are found in hair and wool. b)include myoglobin and collagen. c)are usually water soluble. d)aggregate in aqueous media. e)are often made of β-pleated sheet and α-helix sections wrapped into compact structures. 2) Select all that apply. The Bohr effect: a)depends on the atomic orbital structure of hydrogen. b)can be summarized as a reduction in the oxygen affinity of hemoglobin with decreasing pH. c)is explained by the protonation of key amino acids, including the...
9. The greatest gas solubility in water is predicted under what conditions? A) high T, high...
9. The greatest gas solubility in water is predicted under what conditions? A) high T, high partial pressure C) low T, low P 8) high T, low P D) low T, high P Identify the type of interaction between atoms in a nonbonding atomic solid. A) polar bonding B) ionic bonding C) covalent bonding D) hydrogen bonding E) weak dispersion forces 10. 11. Identify the formula for silica. 12. Identify the element with the least band gap A) Lead B)...
Name: 4. Put the following reactions in the order they occur in elycolysis. Indicate reactions do...
Name: 4. Put the following reactions in the order they occur in elycolysis. Indicate reactions do not occur (exactly in reverse) in the gluconeogenic pathway and also which steps are likely to be catalyzed by a highly regulated enzyme. Also indicate which step would "back up" under anaerobic conditions if fermentation did not occur (16 pts) (a) Dehydration of 2-Phosphoglycerate to form PEP (b) Phosphorylation of Fructose-6-Phosphate to form Fructose-1,6-bis- Phosphate (c) 1,3-Phosphoglycerate reacts with ADP to generate ATP (d)...
Chem 101 Sec 14 Summer 2019 10. What coefficient is placed in front of O, to...
Chem 101 Sec 14 Summer 2019 10. What coefficient is placed in front of O, to balance the following equation for the combustion of propane? 6CO, + 8H:O O 2C3Hg + a. 6 b. 8 c. 10 d. 20 True or False? Any molecule with polar bonds will be a polar molecule... 11. 12. When writing the Lewis Dot structure for O2 (oxygen gas), how many valence electrons should you start with? a. 2 b. 6 c. 8 d. 12...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
1. A chemical reaction "A" has a DG of -10 kcal/mole. Calculate the key for the...
1. A chemical reaction "A" has a DG of -10 kcal/mole. Calculate the key for the reaction A. Show the equation that you have used and all the calculations to get full credit. (2 pts). 2. State two common features among most of the activate carriers that you have studied in class. (2 points) 3. Study the sequence of the peptide given below and answer the following questions based on the peptide sequence given below. AGLRHTICHMKDCFY (10 points) A. Name...
Page < 2 > of 5 0 8) In the most stable conformation of tert-butylcyclohexane, how...
Page < 2 > of 5 0 8) In the most stable conformation of tert-butylcyclohexane, how many axial hydrogen atoms are present? a. O Eb. 2 e. 6 9) Which statement is true concerning the mechanism for reaction between HBr and H2C=CH2 to form bromoethane? a the reaction forms mechanism shows electron movement using full arrows, e.g. b. the reaction involves a slow, rate-determining formation of a radical intermediate c. the reaction involves homolysis d. In the first step, HBr...
Two Biology problems Please answer all of these with details otherwise please 'do not answer any'...
Two Biology problems
Please answer all of these with details otherwise please 'do not
answer any'
A. The figure above shows two types of carbohydrates commonly found in plants. Which of the following is a correct statement about these carbohydrates? a. A is an energy storage polysaccharide because its beta-glycosidic linkages are more resistant to hydrolysis. b. B is a structural polysaccharide because its beta-glycosidic linkages are more easily hydrolyzed. c. B is an energy storage polysaccharide because its alpha-glycosidic...
41. Find the mismatched pair: A) Entropy (ΔS)—measurement of disorder in a thermodynamic system B) First...
41. Find the mismatched pair: A) Entropy (ΔS)—measurement of disorder in a thermodynamic system B) First Law of Thermodynamics—Energy in a system is not created nor destroyed, only transformed C) Second Law of Thermodynamics—The entropy of a perfect crystal at 0 K is exactly equal to zero. D) Standard free energy (Go )—The useful energy in a system E) ΔG < 0—Energetically favorable (spontaneous) reaction 42. Which of the following reactions is unfavorable? A) NaCl dissolving in water (ΔG <...
9. The greatest gas solubility in water is predicted under what conditions? A) high T, high partial pressure C) low T, low P 8) high T, low P D) low T, high P Identify the type of interaction between atoms in a nonbonding atomic solid. A) polar bonding B) ionic bonding C) covalent bonding D) hydrogen bonding E) weak dispersion forces 10. 11. Identify the formula for silica. 12. Identify the element with the least band gap A) Lead B)...
Name: 4. Put the following reactions in the order they occur in elycolysis. Indicate reactions do not occur (exactly in reverse) in the gluconeogenic pathway and also which steps are likely to be catalyzed by a highly regulated enzyme. Also indicate which step would "back up" under anaerobic conditions if fermentation did not occur (16 pts) (a) Dehydration of 2-Phosphoglycerate to form PEP (b) Phosphorylation of Fructose-6-Phosphate to form Fructose-1,6-bis- Phosphate (c) 1,3-Phosphoglycerate reacts with ADP to generate ATP (d)...
Chem 101 Sec 14 Summer 2019 10. What coefficient is placed in front of O, to balance the following equation for the combustion of propane? 6CO, + 8H:O O 2C3Hg + a. 6 b. 8 c. 10 d. 20 True or False? Any molecule with polar bonds will be a polar molecule... 11. 12. When writing the Lewis Dot structure for O2 (oxygen gas), how many valence electrons should you start with? a. 2 b. 6 c. 8 d. 12...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
1. A chemical reaction "A" has a DG of -10 kcal/mole. Calculate the key for the reaction A. Show the equation that you have used and all the calculations to get full credit. (2 pts). 2. State two common features among most of the activate carriers that you have studied in class. (2 points) 3. Study the sequence of the peptide given below and answer the following questions based on the peptide sequence given below. AGLRHTICHMKDCFY (10 points) A. Name...
Page < 2 > of 5 0 8) In the most stable conformation of tert-butylcyclohexane, how many axial hydrogen atoms are present? a. O Eb. 2 e. 6 9) Which statement is true concerning the mechanism for reaction between HBr and H2C=CH2 to form bromoethane? a the reaction forms mechanism shows electron movement using full arrows, e.g. b. the reaction involves a slow, rate-determining formation of a radical intermediate c. the reaction involves homolysis d. In the first step, HBr...
Two Biology problems
Please answer all of these with details otherwise please 'do not
answer any'
A. The figure above shows two types of carbohydrates commonly found in plants. Which of the following is a correct statement about these carbohydrates? a. A is an energy storage polysaccharide because its beta-glycosidic linkages are more resistant to hydrolysis. b. B is a structural polysaccharide because its beta-glycosidic linkages are more easily hydrolyzed. c. B is an energy storage polysaccharide because its alpha-glycosidic...
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