Hydrogen bonding helps to stabilize all of the structural levels of protein except for...

biochem exam 2

Quiz
•
Chemistry
•
University
•
Easy
Mary Posadas
Used 1+ times
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97 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Primary structure
Secondary structure
Tertiary structure
Quaternary structure
Quaternary structure
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The hydrophobic effect helps to stabilize which of the structural levels of protein below?
Primary structure
Secondary structure
Tertiary structure
Quaternary structure
Tertiary & Quaternary
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following is true for both alpha helices and beta sheets?
Formation of these motifs are enthalpically stabilized by hydrogen bonding
Compared to unfolded polypeptides, their formations are entropically unfavored.
Formation of these motifs are enthalpically stabilized by the hydrophobic effect.
All of above
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
True or false: Tertiary and quaternary structure are never stabilized by covalent bonds
True
False
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following is the least likely to denature a protein?
Addition of sodium dodecyl sulfate to the protein solution
Boiling the protein solution
Addition of 10 M NaOH to the protein solution
Addition of benzene to the protein solution.
Addition of 1 M NaCl to the protein solution
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following provide no enthalpic contribution to the stability of the 3D structure of a protein?
Hydrophobic effect
Disulfide bonds
London’s forces
Dipole-dipole interactions
Ion-dipole interactions
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What concentration of ligand ([L]) is needed for 80. % of the binding sites to bind ligand if the Kd for ligand binding is 500 μM? The protein is a homodimer that exhibits no cooperativity between binding sites.
250 μM
500 μM
2000 μM
200,000 μM
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