WorksheetsProteins, Structure and Functions
Total questions: 19
Worksheet time: 10mins
Check all of the boxes that can be a function of a protein.
help transport nutrients like oxygen in the blood
can help speed up chemical reactions like fat digestion
build structures like hair and nails
make up structures like antibodies and membrane pumps
Proteins are made of 21 building blocks known as ________.
monosaccharides
nucleic acids
amino acids
cholesterol
Amino acids are made of which of the following?
C,H,O, AND P
x (CH2O) Where x can be any whole number
C,H,O, AND N
C,H,O and long C-H side chains
The primary structure of a protein is:
the protein structure at its preferred pH and temperature.
the protein structure that results from intermolecular twisting and bonding.
the final, most important, folded structure of the protein.
the sequence of amino acids coded by the DNA.
What is a peptide bond?
the bond resulting from joining two amino acids
a bond formed by removing H and O-H from adjacent amino acids so that they can link together
both of these
Choose the diagram that represents a secondary protein structure?
Choose the diagram that represents a quaternary protein structure?
The functions of many proteins is determined by the shape. Shape is often determined by characteristics of amino acids. The _____________ region of a protein would orient towards the watery surface of a cell.
Hydrophobic
Hydrophilic
Charged
The _____________ region of a protein would orient away from the watery surface of a cell.
Hydrophobic
Hydrophilic
Charged
_____________ amino acid regions allow the protein to interact with substances with complementary charges. (+ -)
Hydrophobic
Hydrophilic
Charged
_____________ are proteins that bind to specific substances to speed up the reaction.
Viruses
Substrates
Enzymes
Viruses target specific types of cells. How are they like enzymes?
They work very quickly
They bind to specific reaction sites
No-one understands either viruses or enzymes
They are both made of protein and DNA
Enzymes lower the amount of energy required by the chemical reaction.
True
False
Enzymes bind substrate at a place called the _________.
Active site
Complex site
Reaction site
Which part of the picture the enzyme?
a
b
c
d
Part c shows the ____________.
substrate
active site
enzyme-substrate complex
Enzymes work best at specific _____________. As the ___________ rises the enzyme activity generally increases but when it increases to much the enzyme is destroyed or denatured.
Temperature
Pressure
Hydration
concentration
Each enzymes works at an optimal ___________. Fluctuations in acidity can destroy or denature enzymes.
Temperature
pH
Hydration
Concentration
Increasing the concentration of enzyme or substrate increases the rate of the reaction only to a point. The system may become congested with too much material.
True
False
