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BIOCHEM 4511: Dr. Wu: CH. 5-6 Mastering exam 2024 midterm $16.79
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BIOCHEM 4511: Dr. Wu: CH. 5-6 Mastering exam 2024 midterm
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BIOCHEM 4511: Dr. Wu: CH. 5-6 Mastering exam 2024 midterm

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  • July 26, 2024
  • 11
  • 2023/2024
  • Exam (elaborations)
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  • biochem 4511 dr wu ch 5 6 mastering exam 2024

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  • Biochemistry
  • Biochemistry

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BIOCHEM 4511: Dr. Wu: CH. 5-6 Mastering
exam 2024 midterm


In considering protein secondary structure which of the following is
INCORRECT? - ANSWER-The 310 helix is right-handed and often
contains proline residues


The amino acid side chain residues in an α helix point ________ away
from the center of the helix. - ANSWER-Outward


__________ between amide protons and carbonyl oxygens is necessary
to stabilize a regular folding of protein secondary structure. - ANSWER-
Hydrogen Bonding


A ________ plot describes which structures in a polypeptide are
sterically possible and which are not based on the angles of rotation
about the backbone Namide -Cα and Cα-Ccarbonyl bonds. - ANSWER-
Ramachandran


Proteins have an asymmetrical tertiary structure, while multi-subunit
proteins can exhibit several types of symmetry. - ANSWER-True

, The functional organization of proteins where specific complexes of two
or more polypeptides are formed is called ________ structure. -
ANSWER-Quaternary structure


To what level of structure do α-helices belong? - ANSWER-Secondary
structure


What is TRUE about the rotation of bonds in a protein backbone? -
ANSWER-The bond between the carbonyl carbon and nitrogen is
restricted. Other bonds are free to rotate depending only on steric
hindrance or the presence of proline residues.


The conformation of the backbone of a polypeptide is described
completely by the angle(s) of rotation about which bond(s)? - ANSWER-
N-Cα and Cα-C bonds only


Ramachandran determined the "allowed" values of the phi and psi
angles primarily by considering ________. - ANSWER-Steric Hindrance


The amino acid that destabilizes alpha-helical structures and is usually
found at the ends of alpha helices is______________. - ANSWER-
Glycine


Proline is NOT often found in α-helices of proteins because it - ANSWER-
Lacks a hydrogen atom on its amide nitrogen

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