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WorksheetsIB Biology 2.4 Proteins
Total questions: 24
Worksheet time: 13mins
Which one shows a secondary structure of protein?
How many polypeptides does hemoglobin have?
3
10
8
4
Proteins including enzymes can be used for removing stains, pregnancy tests, and insulin for treating diabetes.
False
True
What is the correct definition for a polypeptide?
Chains of amino acids that are made by linking together amino acids by condensation reactions.
Two amino acids are linked by a condensation reaction between the amine group of one amino acid and the carboxyl group of the other.
Four amino acids, linked by three peptide bonds.
What amino acid is this?
Alanine
Glycine
Glutamic acid
Serine
Which one shows a primary structure of protein?
Are ALL of these functions carried out by proteins? Cytoskeletons, Blood clotting, Cell adhesion, Immunity
Yes
No
What is collagen’s function?
Enzymes in secretions such as nasal mucus and tears; it kills some bacteria by digesting the peptidoglycan in their cell walls.
Membrane protein used to make connections between structures inside and outside a cell.
Structural protein in tendons, ligaments, skin and blood vessel walls; it provides high tensile strength, with limited stretching.
Transport protein in red blood cells; it binds oxygen in the lungs and releases it in tissues with a reduced oxygen concentration.
How many bases of the gene are needed in order to code for each amino acid in the polypeptide?
4
5
9
3
Amino acids that are linked together by ribosomes to make polypeptides all have some identical structural features.
False
True
What amino acid is this?
Glycine
Glutamic acid
Serine
Alanine
How many polypeptides does insulin contain?
2
5
1
3
Denaturation is a structural change in a protein that results in the loss (usually permanent) of its biological properties.
False
True
What are the two key conditions that cause denaturation?
(a)
Which of these is NOT an example of the different functions of proteins?
Spider silk
Elastin
Immunoglobulins
Actin
Which one shows a tertiary structure of protein?
Which part of the amino acid is never the same?
Amine group
Carboxyl group
R group
Hydrogen group
A proteome is as unique to a person as their genome is.
True
False
What type of bond joins neighboring amino acids together? (check all that apply)
Peptide bonds
Hydrogen bonds
Ionic bonds
Covalent bonds
Which one of the following is one of the functions/roles a protein serves in a cell? (check all that apply)
Immunity
Hormones
Sensation
Transport
What is the name of the bond that is formed when a polypeptide is made?
Ester bond
Glycosidic bond
Amine bond
Peptide bond
Most organisms use the same 20 amino acids and genetic code. However, which one of these is an exception?
Valine
Lysine
Collagen
Serine
Which parts of the amino acid react with another amino acid to form a peptide bond?
The carboxyl group and the amino group
The amine group and the R group
The R group and carbon backbone
The carboxyl group and the R group
Which one shows a quaternary protein structure?
