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WorksheetsProteins review
Total questions: 22
Worksheet time: 11mins
The difference between tertiary and quartenary structure is:
Tertiary structure has double bond whereas quartenary structure does not have double bond
Tertiary structure consists of one polypeptide chain whereas quartenary structure consists of more than one polypeptide chains
Tertiary structure is fibrous whereas quartenary structure is globular
Tertiary structure is water-soluble whereas quartenary structure is lipid soluble
The repeating units of protein are
Amino acids
Glucose
Fatty acid
Peptides
The polypeptide in the diagram consists of;
3 amino acids and 3 peptide bonds
3 amino acids and 2 peptide bonds
4 amino acids and 2 phosphodiester bonds
3 amino acids and 2 phosphodiester bonds
The diagram shows the structure of collagen. Based on the diagram, what is the structural level of collagen?
Primary
Secondary
Tertiary
Quartenary
Which of the following bond(s) can be found in a tertiary structure?
hydrogen bond
disulphide bridge
hydrophobic interaction
all of the above
Haemoglobin is a quartenary protein because;
It has more than one peptide bonds
Its shape is globular
It consists of more than one polypeptide chains
It has iron in each heme group
Based on the diagram, the side chain of amino acid alanine is;
NH2
COOH
H
CH3
What is a functional group in M?
Carbonyl
Hydroxyl
Amine
Sulfhdryl
Identify bond K
ester bond
peptide bond
glycosidic bond
hydrogen bond
Beta pleated sheets are characterized by
hydrogen bonds between adjacent cellulose
membrane sheets composed of phospholipids
folds stabilized by hydrogen bonds between segments of the polypeptide backbone
parallel regions of the polypeptide chain held together by hydrophobic interactions
The alpha helix of proteins is
part of tertiary structure and is stabilized by disulfide bridges
a double helix
stabilized by hydrogen bonds and commonly found in fibrous protein
found in some regions of globular proteins and stabilized by hydrophobic interactions
What happens when protein dentures?
it loses its primary structure
it loses its secondary and tertiary structure
it hydrolyzes into component amino acids
it becomes irreversibly insoluble and precipitates
Identify interaction in S
Hydrophobic interactions
Disulphide bridges
Hydrogen bonds
van de walls
What is a long chain of amino acids called?
Polysaccharide
Lipid
Carbohydrate
Polypeptide
Nucleic acid
All proteins
have a unique structure that determines their unique function.
are exactly the same in function but different in structure.
are exactly the same in structure but different in function.
are enzymes.
Which protein structure describes the sequence of amino acids?
Primary
Secondary
Tertiary
Quaternary
Alpha helix and beta sheet are examples of what type of protein structure?
Primary
Secondary
Tertiary
Quaternary
Which protein structure describes a protein's three-dimensional shape?
Primary
Secondary
Tertiary
Quaternary
Which reaction is needed to break the bond between two amino acids?
Dehydration
Dehydrogenation
Hydration
Hydrolysis
