Which of the following would alter protein primary structure?
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Boiling |
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A reducing agent like beta-mercaptoethanol (BME) |
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decreasing pH |
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None of the above |
None of the above.
Explanation: all thses treatments disrupt the quaternary and tertiary structure of protein. For example beta mercaptaethanol breaks the sulphide bridge between amino acid, sulphide bond stable the quaternary and tertiary structure.
Primary structure is the amino acid sequence joined by peptide bond. None of the above can disrupt the primary structure.
Which of the following would alter protein primary structure? Boiling A reducing agent like beta-mercaptoethanol (BME)...
What level of structure would be affected by a reducing agent in a dimeric protein? Select one: a. primary structure b. secondary structure c. quaternary structure d. none of the above
9. What does a reducing agent such as beta-mercaptoethanol OH-CH2-CH2 -SH do in the process of straightening curly hair? 10. Think about the changes of ionization state of amino acids in general and more specific the amino acid Histidine at different pH. The charge in this residue depends on the environment. How can a protein act as a buffer in the cell?
With respect to proteins, a change in pH cannot alter: primary structure All of the above quaternary structure tertiary structure secondary structure Which of the following statements about phospholipid molecules is false? None of the above phospholipases can switch the acyl groups as well as the head groups have different head groups have glycerol backbone should have palmitate as one of the acyl groups
The hydolosis of a protein affects which of the following levels of structure? a) Primary b) secondary? c) tertiary d) all of the above ????
QUESTIONS The primary structure of a protein is the result of which of the following bond types? O A amide bond B. hydrophobic interactions o disulfide bond D. hydrogen bond QUESTION 6 Quaternary structure is associated with A the sum of the secondary and tertiary structures B. the relative orientation of one polypeptide to another polypeptide in a multisubunit protein o the formation of the primary structure D. the shape of the polypeptide chain
21. Which of the following would NOT change the structure and function of a protein A Methylation of a protein B. Lipid modification of a protein C Change in the length of the Poly A tail of the mRNA transcript encoding a protein D. Change in the position of reactive amino acids E. Proteolysis 22. Two peptides have almost the exact same primary structure, except that one has about 10 fewer amino acids at the amino-terminus (N-terminus) of the protein....
The following reactions use the species above. Determine the oxidizing agent and the reducing agent, and which atom is oxidized or reduced for each reaction C2H4 + 3 O2 → 2 CO2 + 2 H2O Atom oxidized: Oxidizing agent: Atom reduced: Reducing agent: CuO + H2 → Cu + H2O Atom oxidized: Oxidizing agent: Atom reduced: Reducing agent: Cu + 4HNO3 → Cu(NO3)2 + 2 NO2 + 2 H20 Atom oxidized: Oxidizing agent: Atom reduced: Reducing agent:
Which of the following statements justifies why LiAIH, is a more powerful reducing agent than its isoelectronic counterpart NaBH4? NaH is a strong nucleophile, meaning the direct attachment of the hydride to the sodium ion will make the hydride more nucleophilic like LiAlH4. The dipole moment of LiAIHs is higher than that of NaBHa, making its hydride more nucleophilic. NaBH4 is just as much of a strong reducing agent, with the ability to reduce a nitrile to a primary amine....
8. Which of the following statements justifies why LiAlHs is a more powerful reducing agent than its isoelectronic counterpart NaBH4? i. NaH is a strong nucleophile, meaning the direct attachment of the hydride to li. The dipole moment of LiAIHs is higher than that of NaBHa, making its hydride ii. NaBHs is just as much of a strong reducing agent, with the ability to reduce a the sodium ion will make the hydride more nucleophilic like LiAIH more nucleophilic. nitrile...
Which of the following species would be the strongest reducing agent? A. Na+; Eºred = -2.71 V O B. Cu2+; Eºred = 0.34 V O C. Agt; Eºred = 0.80 V O D. Fe2+; Eºred = -0.44 V