2. True or False. If false, explain why. (a.) Only at very high or very low...
2. True or False. If false, explain why.
(a.) Only at very high or very low pH does the non-ionized form of an amino acid predominate.
(b.) At a pH greater than the pKa of an ionizable group, more than half of such groups are dissociated.
Homework Answers
A) False. At very low pH amino acid exists in cationic form and if placed in electric field it migrates to cathode. at high pH aminoacids exist in anionic form.
B) TRUE.
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2. True or False. If false, explain why.
(a.) Only at very high or very low...
(References Explain why an amino acid will not exist in an un-ionized form at any pH....
(References Explain why an amino acid will not exist in an un-ionized form at any pH. All amino acids have a carboxyl group that is a stronger acid than water and an amino group that is a stronger acid than water. When lots of hydrogen ions are present (meaning the pH is relatively low), the carboxyl group is protonated and the amino group is unaffected When lots of hydroxide ions are present (meaning the pH is relatively high), the carboxyl...
please help with these 4 questions and explain why you chose what you did. thanks and...
please help with these 4 questions and explain why you
chose what you did. thanks and I'll give thumbs up.
11. A particular amino acid without an ionizable R-group would have a pl of is 3.1 and pK2 is 8.9 ; if its pK1 2.9 a. b. 5.8 6 C. d. 12 12. A certain amino acid with an ionizable side chain has a pK1 of 2.4, a pK2 of 8.9, and a pKR of 6.5. If the amino acid...
True or False and explain your answer High performers have more room for improvement than low...
True or False and explain your answer High performers have more room for improvement than low performers. Low performers, who have training and experience, are not likely to improve much. Coaching persistently, low performers is unlikely to produce quick results. Most Performance Improvement Plans do not result in improved performances. Effective coaches spend more time with high performers than with low performers. Questions are more effective coaching tools than recommendations. Many coaching efforts fail because they focus on employees’ weaknesses.
For the following amino acids - explain why the overall charge on the amino acid is...
For the following amino acids - explain why the overall charge on the amino acid is different at PH's 2, 7, and 11. Relate it to the pk, of the groups on the molecules To achieve distinction, you must explain that the form of an amino acid, whether positively charged, negatively charged or neutral, depends on the pH of the solution and also on the Ka of the acid group
1. Explain why polyaspartatic acid (a peptide containing only aspartic acid residues) does NOT form an...
1. Explain why polyaspartatic acid (a peptide containing only aspartic acid residues) does NOT form an alpha helix at pH 7.0 but can at pH 2. 6. 2. What kind of non-covalent interaction would the following pairs of amino acids have in the three dimensional structure of a protein at pH 7.0? a) His-Asp b) Tyr-Asp c) Val-Leu d) Trp-Gln 3. Explain how the difference in structure of hemoglobin and myoglobin contribute to their different functions.
True or False. State whether the following statements are true or false and explain why the...
True or False. State whether the following statements are true or false and explain why the statement is true or false. (2 points each) 5. The greenhouse effect is a man-made phenomenon that is caused by fossil fuel burning. 6. Southern California is a global biodiversity hotspot because of its high alpha diversity. 7. Elevated CO2 exposure will cause a decline in plant tissue nitrogen concentration. 8. Elevated CO2 will cause a greater biomass increase for C3 plants than C4...
How does hypochlorous acid act as a disinfectant? Explain the impact of low and high pH...
How does hypochlorous acid act as a disinfectant? Explain the impact of low and high pH on the amount of hypochlorous acid in solution. Why must the pH of a swimming pool be maintained between 7.2 and 7.8? What chemicals can be used if the pH is too high? What chemicals can be used if the pH is too low?
a) For most enzymes, the Km is closely related to the affinity of the enzyme for...
a) For most enzymes, the Km is closely related to the affinity of the enzyme for its substrate(s). Which has higher affinity, an enzyme with a low Km, or an enzyme with a high Km? Justify your answer. b) True or false: at a pH equal to its pKA, the average charge on an ionizable amino acid sidechain (such as lysine's ε-amino group) will be zero. c) Titration of isoleucine by a strong base, for example NaOH, reveals two pK’s....
True or False and explain why it is true or false It is typically a waste...
True or False and explain why it is true or false It is typically a waste of time to put a lot of effort into motivating marginal performers. Paying for performance is the most impactful tool for motivating employees. Positive feedback is a stronger motivational tool than money for most employees. Effective leaders invest heavily in improving persistently low performers. It is better avoid praising too much as this creates jealousy among some employees. Praise should be given only when...
Determine whether the sentences are true or false 27-( ) The only acidic amino acid is...
Determine whether the sentences are true or false 27-( ) The only acidic amino acid is aspartic acid. 36-( ) The quaternary structure is physically very strong because many polypeptides are clustered together. 37-( ) The amino acid sequence consisting of I-V-V-F-V is judged to form a β strand. 38-( ) The amino acid sequence consisting of A-E-A-E-L-A-L-E is judged to form an α-helix. 39-( ) If the molecular weight of glycine is 75, the molecular weight of the peptide...
(References Explain why an amino acid will not exist in an un-ionized form at any pH. All amino acids have a carboxyl group that is a stronger acid than water and an amino group that is a stronger acid than water. When lots of hydrogen ions are present (meaning the pH is relatively low), the carboxyl group is protonated and the amino group is unaffected When lots of hydroxide ions are present (meaning the pH is relatively high), the carboxyl...
please help with these 4 questions and explain why you
chose what you did. thanks and I'll give thumbs up.
11. A particular amino acid without an ionizable R-group would have a pl of is 3.1 and pK2 is 8.9 ; if its pK1 2.9 a. b. 5.8 6 C. d. 12 12. A certain amino acid with an ionizable side chain has a pK1 of 2.4, a pK2 of 8.9, and a pKR of 6.5. If the amino acid...
For the following amino acids - explain why the overall charge on the amino acid is different at PH's 2, 7, and 11. Relate it to the pk, of the groups on the molecules To achieve distinction, you must explain that the form of an amino acid, whether positively charged, negatively charged or neutral, depends on the pH of the solution and also on the Ka of the acid group
True or False. State whether the following statements are true or false and explain why the statement is true or false. (2 points each) 5. The greenhouse effect is a man-made phenomenon that is caused by fossil fuel burning. 6. Southern California is a global biodiversity hotspot because of its high alpha diversity. 7. Elevated CO2 exposure will cause a decline in plant tissue nitrogen concentration. 8. Elevated CO2 will cause a greater biomass increase for C3 plants than C4...
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