32 Questions
What do proteins do in the form of enzymes, hormones, antibodies, and globulins?
Catalyze, regulate, and protect the body chemistry
What is the primary structural unit of proteins?
Polypeptides
How are dietary proteins related to essential amino acids?
Dietary proteins are the source of essential amino acids
What is the meaning of the Greek word 'proteios' from which the term 'proteins' is derived?
First
What is the result of boiling aqueous acid or base with proteins?
Yields an assortment of small molecules identified as α-aminocarboxylic acids
How many types of amino acids make up a protein?
$20$
Which type of amino acids can be obtained through our diet?
Essential amino acids
What is the function of insulin?
Hormone
What bonds connect the amino group of one amino acid to the carboxyl group of the other amino acid in a protein chain?
Peptide bonds
What is determined by the sequence of amino acids in the protein chain?
Primary Structure
Which type of secondary structure has a right-handed coiled strand?
α-helix
What type of bonding makes the α-helix structure especially stable?
Hydrogen bonds between the oxygen of each C=O bond and the hydrogen of each N-H group
What type of tertiary structure shows specific local structural conformations dependent on hydrogen bonding?
ß-sheet
What classifies proteins based on their sequence of amino acids in the chain?
Primary Structure
Which structural conformation consists of pairs of strands lying side-by-side, with carbonyl oxygens in one strand bonding with the amino hydrogens of the adjacent strand?
ß-sheet
What is the primary structural unit of proteins?
Amino acid
What type of bonding makes the α-helix structure especially stable?
Hydrogen bonding
What is determined by the sequence of amino acids in the protein chain?
Primary structure
What is the result of boiling aqueous acid or base with proteins?
Hydrolysis
What do proteins do in the form of hemoglobin, myoglobin, and various lipoproteins?
Effect the transport of oxygen and other substances
How are dietary proteins related to essential amino acids?
Dietary proteins are the source of essential amino acids
Which of the following types of proteins carries out the function of transporting nutrients across cell membranes?
Globulins
In which type of protein structure is the sequence of amino acids in the protein chain determined?
Primary Structure
What type of bonding is responsible for making the α-helix structure especially stable?
Hydrogen Bonds
Which type of secondary structure consists of pairs of strands lying side-by-side, with carbonyl oxygens in one strand bonding with the amino hydrogens of the adjacent strand?
ß-sheet
Which amino acid conformation depends on hydrogen bonding and consists of right-handed coiled strands with stable hydrogen bonds?
α-helix
What is the main function of insulin, a type of protein?
Hormone Regulation
Which type of protein can fight infectious agents in living organisms?
Globulins
What determines the local structural conformations of proteins dependent on hydrogen bonding?
Secondary Structure
What kind of bond connects the carboxyl group of one amino acid with the amino group of another amino acid in a protein chain?
Peptide bond
In what form do some proteins function as within living organisms?
Enzyme form
What are proteins formed by and what type of bond connects their amino acids to each other?
Formed by amino acids; connected by peptide bonds
Test your knowledge about proteins and their various functions in living organisms. This quiz covers the structure, role, and types of proteins found in the body.
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