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Structure and Properties of Peptides

Structure and Properties of Peptides
Disulfide bonds most often stabilize the native structure of

extracellular proteins
intracellular proteins
dimeric proteins
hydrophobic proteins

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Structure and Properties of Peptides
Heme is the binding pocket of myoglobin and hemoglobin and is composed of

positively charged residues
polar residues
negatively charged residues
hydrophobic residues

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Structure and Properties of Peptides
The heme is held in place by a bond between

the Fe3+ and cysteine
the Fe2+ and cysteine
the Fe3+ and histidine
the Fe2+ and histidine

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Structure and Properties of Peptides
Which of the three subunits of the G proteins binds GDP and GTP?

Gamma
Beta
Delta
Alpha

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Structure and Properties of Peptides
In the β-pleated sheet

hydrogen bonds are formed between the peptide bonds
adjacent polypeptide chains can either be parallel or antiparallel
the polypeptide chain is fully extended
All of these

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Structure and Properties of Peptides
An oil drop with a polar coat is a metaphor referring to the three dimensional structure of

fibrous proteins
collagen
globular proteins
silk protein

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MORE MCQ ON Structure and Properties of Peptides

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