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Exam 19: Proteins

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Question 31

Multiple Choice

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If a protein is made up of primarily of long,rod-shaped or string-like structures,it would be considered a ____ protein.

A) conjugated
B) globular
C) fibrous
D) enzymatic

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Question 32

Multiple Choice

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By convention,the N-terminal end of a peptide is usually placed on the ____ of a structure.

A) right
B) left
C) bottom
D) top

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Question 33

Multiple Choice

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$\alpha$ -Keratin,the protein of hair and skin,has extensive sections with the ____ secondary structure.

Which of the following proteins is an example of a glycoprotein?

A disulfide bridge within a protein molecule is different from the hydrogen bonding within the molecule because the disulfide bridge is a stronger bond than the hydrogen bond.

Which polypeptide stimulates the production of adrenal hormones?

Which of the following is the structure for alanine?

The given protein segment is correctly labeled.

How many different tripeptides could be formed by 1 of each of the following amino acids? [ lysine histidine aspartate ]

A major characteristic of the alpha amino acids is that they all possess polar side chains;the beta amino acids do not possess side chains.

A pleated sheet structure is an example of ____ protein structure.

The figure below shows a portion of what type of secondary protein structure?

The quaternary structure of hemoglobin contains two subunits.

Which of the following is the structure for tryptophan?

An alpha amino acid contains

The peptide linkage is an amide bond.

Proteins can be classified based on _____ .

What type of interaction forms when two side chains containing an amino group and a carboxyl group are in close proximity?

Which of the following is the best representation of an lysine in an aqueous solution at pH = 12?

Cross links between peptide chains resulting from interactions of the side chains contribute to which type of protein structural feature?