Clinical Chemistry 1: Proteins Characteristics

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What is the percentage of nitrogen content in proteins?

20%

16% (correct)

25%

10%

What type of bonding occurs between the CO and NH groups of peptide bonds in secondary structure?

Van der Waals forces

Hydrogen bonds (correct)

Covalent bonds

Disulfide linkages

Which end of a protein structure has a free amino group?

C-terminal

Alpha helix

Beta sheet

N-terminal (correct)

What is the primary structure of proteins?

The sequence of amino acids linked through covalent peptide bonds Signup and view all the answers

What is the result of the interaction between the R groups of amino acids in tertiary structure?

Folding of the polypeptide chain into a three-dimensional structure Signup and view all the answers

What is the quaternary structure of proteins?

The binding of two or more polypeptide chains Signup and view all the answers

What is the main characteristic of globular proteins?

Symmetrical, compactly folded polypeptide chains Signup and view all the answers

Which type of protein has a carbohydrate prosthetic group?

Glycoproteins and Mucoproteins Signup and view all the answers

What is one of the functions of proteins in the body?

Energy production Signup and view all the answers

What is the role of proteins in maintaining colloidal osmotic pressure?

Water distribution Signup and view all the answers

What is the function of the ionizable R groups of amino acids in proteins?

Buffering capacity Signup and view all the answers

What is the function of proteins that bind to hormones, free hemoglobin, lipids, drugs, and calcium?

Transportation of molecules Signup and view all the answers

What is the primary function of antibodies in the human body?

To protect the body against 'foreign' invaders Signup and view all the answers

What type of proteins function as receptors for hormones?

Cellular proteins Signup and view all the answers

Which hormone is an example of a protein hormone?

Adrenocorticotropic hormone (ACTH) Signup and view all the answers

What is collagen an example of?

A structural protein Signup and view all the answers

Where are most plasma proteins synthesized?

The liver Signup and view all the answers

What is the byproduct of amino acid deamination during protein degradation?

Ammonia Signup and view all the answers

What is the result of peptide bond formation?

Protein synthesis Signup and view all the answers

What is the primary function of enzymes?

To catalyze chemical reactions Signup and view all the answers