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Exam 19: Proteins

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Question 31

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The given protein segment is correctly labeled.

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Question 32

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Which polypeptide stimulates the production of adrenal hormones?

A) ACTH
B) ADH
C) glucagon
D) prolactin

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Question 33

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

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

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

The peptide linkage is an amide bond.

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

Which of the following is the structure for tryptophan?

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

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

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

Which of the following is the structure for alanine?

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

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.

Proteins can be classified based on _____ .

The quaternary structure of hemoglobin contains two subunits.

An alpha amino acid contains

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

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

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.