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WorksheetsOrganic Chemistry: Protein
Total questions: 10
Worksheet time: 6mins
Select the correct function/s of protein.
Reserve energy of animals and plants.
The skeletal structure of plants.
Part of transport in human body.
Act as catalysts in chemical reactions.
Can protect an organism against disease.
Select the correct statement/s about amino acids.
Amino acids are compounds that contain an amino group alpha to a carboxyl group.
Each amino acid has an acid (a -COOH group) and a base
(an -NH2 group) that undergo an acid–base reaction.
the vast majority of naturally occurring amino acids have the d-configuration at the a-carbon.
All protein-derived amino acids are chiral.
Amino acids are weak polyprotic acids.
Select the correct statement/s about polypeptide or protein?
A peptide bond is the special name given to the amide
bond formed between a-amino acids.
The primary (1°) structure of a polypeptide or protein refers to the sequence of amino acids in its polypeptide chain.
A-helix and B-pleated sheet are types of tertiary structure.
Tertiary (3°) structure refers to the overall folding pattern and arrangement in space of all atoms in a single polypeptide chain.
Secondary (2°) structure is the arrangement of individual polypeptide chains into a non-covalently bonded aggregate.
Answer true or false to the following statement. The isoelectric point of an amino acid is the pH at which the majority of molecules in solution have a net charge of -1.
True.
False.
Disulfide bonds play an important role in maintaining tertiary structure. What kind of amino acid that form disulfide bond?
Phenylalanine
Valine
Histidine
Cysteine
Tyrosine
Protein chain stabilized through chemical bonding and interaction. Which can be categorized as stabilizing factors in a protein?
Hydrogen bonding.
Salt bridges.
Hydrophobic interactions.
Disulfide bonds.
Double bonds.
Of the 20 protein-derived amino acids, what amino acids contain aromatic rings?
Phenylalanine.
Serine
Histidine.
Methionine.
Tyrosine.
Answer true or false to the following statement. Electrophoresis, a process of separating compounds on the basis of their electric charges, is used to create a synthetic protein.
True.
False.
The structure of proteins can be changed by environmental factors such as ....
Basic.
Temperature.
Radiation.
Salt concentrations.
Physical intervention.
What gives a protein its unique shape?
The sequence of amino acids in its polypeptide chain.
The folding due to the sequence of amnio acids in the polypeptide chain.
The interactions between the 'R' groups.
All of these.
None of these.
