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1. When will a protein have the lowest solubility?

1. When will a protein have the lowest solubility?

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Multiple Choice: Read each question carefully and select the best answer. 1. When will a protein have the lowest solubility? A. when the pH is above the isoelectric point B. when the pH is below the isoelectric point C. at neutral pH D. at isoelectric pH 2. Which of the following is true of proteins? A. all proteins are acidic B. all proteins are basic C. all proteins are neutral D. the acid/base properties of a protein depend on the identity of its side chains _3. Which of the following correctly describes relationship between the primary structure of a protein and protein function? A. changing one amino acid always affects protein function B. only when changing more than one amino acid will have an affect protein function C. changing one amino acid never affects protein function D. there is no relationship between primary structure and protein function for the next 7 items, refer to the figure below: 2 Cyst - Tyr 8 3 4 Ile - Gln - Asn - Cyst - Pro - Leu - Gly - NH: 6 9 Охytocin (Human) 3 4 5 6 8 9 Cyst - Tyr - Phe - Gin - Asn - Cyst - Pro - Arg - Gly - NH: Arginine Vasopressin (Human) 4. These molecules are: A. proteins B. nonapeptide C. polypeptide D. amino peptide _5. What is the classification of these molecules based on function? C. hormones A. Structural proteins B. antibody D. enzyme What is the classification of these molecules based on composition? A. pure B. simple 6. C. conjugated D. compound _7. What is the classification of these molecules based on composition? C. conjugated D. compound A. pure B. simple What chemical bond/s is/are presentin these peptides? A. peptide bond only B. disulfide bond only _8. C. peptide bonds and disulfide bonds D. glycosidic bond _9. Which of these peptides contain an amino acid with a side chain IMIDAZOLE? C. Hard to tell D. Either A or B А. Охytocin B. Vasopressin Based on amino acid composition, what is the overall charge of vasopressin? A. Negative В. Positive _10. C. Neutral D. Either A or B
Transcribed Image Text:Multiple Choice: Read each question carefully and select the best answer. 1. When will a protein have the lowest solubility? A. when the pH is above the isoelectric point B. when the pH is below the isoelectric point C. at neutral pH D. at isoelectric pH 2. Which of the following is true of proteins? A. all proteins are acidic B. all proteins are basic C. all proteins are neutral D. the acid/base properties of a protein depend on the identity of its side chains _3. Which of the following correctly describes relationship between the primary structure of a protein and protein function? A. changing one amino acid always affects protein function B. only when changing more than one amino acid will have an affect protein function C. changing one amino acid never affects protein function D. there is no relationship between primary structure and protein function for the next 7 items, refer to the figure below: 2 Cyst - Tyr 8 3 4 Ile - Gln - Asn - Cyst - Pro - Leu - Gly - NH: 6 9 Охytocin (Human) 3 4 5 6 8 9 Cyst - Tyr - Phe - Gin - Asn - Cyst - Pro - Arg - Gly - NH: Arginine Vasopressin (Human) 4. These molecules are: A. proteins B. nonapeptide C. polypeptide D. amino peptide _5. What is the classification of these molecules based on function? C. hormones A. Structural proteins B. antibody D. enzyme What is the classification of these molecules based on composition? A. pure B. simple 6. C. conjugated D. compound _7. What is the classification of these molecules based on composition? C. conjugated D. compound A. pure B. simple What chemical bond/s is/are presentin these peptides? A. peptide bond only B. disulfide bond only _8. C. peptide bonds and disulfide bonds D. glycosidic bond _9. Which of these peptides contain an amino acid with a side chain IMIDAZOLE? C. Hard to tell D. Either A or B А. Охytocin B. Vasopressin Based on amino acid composition, what is the overall charge of vasopressin? A. Negative В. Positive _10. C. Neutral D. Either A or B
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