Protein Structure a.Different function of proteins and examples: b. Protein buil
ID: 143313 • Letter: P
Question
Protein Structure
a.Different function of proteins and examples:
b. Protein building blocks:
1. atomic composition of building block:
2. "parts" or "functional groups" of the building block:
c. Importance of side chain (R group):
d. Hydrophobic amino acids characteristics:
e. Hydrophilic amino acids characteristics:
f. Charged amino acids characteristics
Copy and complete the table below regarding the characteristics and which groups in the polypeptide interact together at each structural level of the protein.
characteristics
groups interacting
Primary structure
Secondary structure
Tertiary structure
Quartenary structure
Value: 2
Choose the correct statement(s). You may choose more than one answer.
[mark all correct answers]
a. Proteins are the building blocks of amino acids.
b. Enzymes are a type of protein.
c. Quartenary structure consists of two or more polypeptide chains interacting.
d. Amino acids are made of carbon, hydrogen, nitrogen and phosphorus.
e. The primary structure of a protein is formed due to the interaction of side groups.
Value: 3
Put the following statements regarding the structural levels of a protein formation in the correct order.
Below is a sequence of events. Place them in the order they should occur, number 1 being the first item. Select the step number from the drop down next to each item.
Items to order:
1. Individual amino acids are bonded together via peptide bonds.
2. Two or more polypeptide chains interact via bonds.
3. Hydrogen bonds form between neighboring amino acids within a polypeptide chain allowing the chain to coil or form pleated sheets.
4. Side groups (R) of the individual amino acids interact with each other allowing the protein to assume its three dimensional shape.
Value:4
Put the following statements regarding the structural levels of a protein formation in the correct order
Individual amino acids are bonded together via peptide bonds.
Two or more polypeptide chains interact via bonds.
Hydrogen bonds form between neighboring amino acids within a polypeptide chain allowing the chain to coil or form pleated sheets.
Side groups (R) of the individual amino acids interact with each other allowing the protein to assume its three dimensional shape.
Value: 5
Hydrophobic amino acids will be found _______________.
a. In the interior (inner core) of a protein, away from the watery environment.
b. in the interior of a plasma membrane.
c. Both A and B
d. Neither
Value: 6
A protein's function is defined by ____________.
a. enzymatic reactions
b. it's shape.
c. chain of nucleotides.
d. the presence of carbon and hydrogen.
Value: 7
Which of the following is NOT considered a protein function?
a. transport of substances across membrane
b. enzymatic reactions
c. provides structural support
d. carries genetic information
characteristics
groups interacting
Primary structure
Secondary structure
Tertiary structure
Quartenary structure
Explanation / Answer
a.Different function of proteins and examples
catalyse reactions- enzymes
provide immunity- antibodies
regulate chromosome structure and gene expression- transcription factors, histones
muscle contraction and movement- actin
structural proteins- keratin
hormones- insulin
b. Protein building blocks:
1. atomic composition of building block: C,H,N,O,S
2. "parts" or "functional groups" of the building block: side chain R group type: aliphatic, acyclic, aromatic; CH2SH, NH3, guanindino group, etc
c. Importance of side chain (R group): different side chains cause different in the properties in the individual amino acids, examle hydrophobicity or 3D structure
d. Hydrophobic amino acids characteristics: the side chains of these amino acids are composed mostly of carbon and hydrogen, have very small dipole moments, and tend to be repelled from water
e. Hydrophilic amino acids characteristics: the side chains of these amino acids are polar or ionic, or acidic or basicand interacts with water
f. Charged amino acids characteristics : these amino acids contain net positive or negative charge at physiological pH
characteristics
groups interacting
Primary structure
sequence of amino acids in the polypeptide chain
carboxyl group and amino group
Secondary structure
local structures that form within a polypeptide due to interactions between atoms of the backbone
hydrogen bonds between the carbonyl O of one amino acid and the amino H of another
Tertiary structure
overall three-dimensional structure of a polypeptide.
due to interactions between the R groups of the amino acids
Quartenary structure
2
a. Proteins are the building blocks of amino acids. Incorrect
b. Enzymes are a type of protein. correct
c. Quartenary structure consists of two or more polypeptide chains interacting. correct
d. Amino acids are made of carbon, hydrogen, nitrogen and phosphorus. incorrect
e. The primary structure of a protein is formed due to the interaction of side groups. incorrect
3
1. Individual amino acids are bonded together via peptide bonds.
3. Hydrogen bonds form between neighboring amino acids within a polypeptide chain allowing the chain to coil or form pleated sheets.
4. Side groups (R) of the individual amino acids interact with each other allowing the protein to assume its three dimensional shape.
2. Two or more polypeptide chains interact via bonds.
4
Individual amino acids are bonded together via peptide bonds.
Two or more polypeptide chains interact via bonds.
Hydrogen bonds form between neighboring amino acids within a polypeptide chain allowing the chain to coil or form pleated sheets.
Side groups (R) of the individual amino acids interact with each other allowing the protein to assume its three dimensional shape.
5
Hydrophobic amino acids will be found _________a______.
a. In the interior (inner core) of a protein, away from the watery environment.
b. in the interior of a plasma membrane.
c. Both A and B
d. Neither
6
A protein's function is defined by ___b_________.
a. enzymatic reactions
b. it's shape.
c. chain of nucleotides.
d. the presence of carbon and hydrogen.
7
Which of the following is NOT considered a protein function?
a. transport of substances across membrane
b. enzymatic reactions
c. provides structural support
d. carries genetic information
1 2 3 4
characteristics
groups interacting
Primary structure
sequence of amino acids in the polypeptide chain
carboxyl group and amino group
Secondary structure
local structures that form within a polypeptide due to interactions between atoms of the backbone
hydrogen bonds between the carbonyl O of one amino acid and the amino H of another
Tertiary structure
overall three-dimensional structure of a polypeptide.
due to interactions between the R groups of the amino acids
non-covalent bonds: hydrogen bonding, ionic bonding, dipole-dipole interactions, and London dispersion forcesQuartenary structure
subunits of multiple polypeptide chains combine weak interactions, such as hydrogen bonding and London dispersion forcesRelated Questions
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