Protein Structure Lesson

Biomolecules

amino acids and proteins

https://bit.ly/3g6YBGv

Multiple Choice

which of the following terms refers to the order in which amino acids are linked together in a protein.

• Primary

• Secondary

• Tertiary

• Quaternary

Multiple Choice

The chain of amino acids folds and coils on itself

• Primary

• Secondary

• Tertiary

• Quaternary

Multiple Choice

The entire polypeptide forms a three-dimensional structure

• Primary

• Secondary

• Tertiary

• Quaternary

Multiple Choice

Two or more polypeptides attached together and work as one unit

• Primary

• Secondary

• Tertiary

• Quaternary

Multiple Choice

What is a peptide bond?

• Bond that holds two amino acids together.
• A bond that holds hydrogen and oxygen molecules together.
• A bond that holds the phosphate group of one nucleotide and a sugar of a neighboring nucleotide.
• A bond that is formed by the sharing of electrons.

Multiple Choice

What is a peptide bond?

• Bond that holds two amino acids together.
• A bond that holds hydrogen and oxygen molecules together.
• A bond that holds the phosphate group of one nucleotide and a sugar of a neighboring nucleotide.
• A bond that is formed by the sharing of electrons.

Multiple Choice

How many different amino acids are there?

• 15
• 20
• 25
• 30

Multiple Choice

What is the monomer of proteins?

• amino acids
• polypeptides
• nucleotides
• monosaccharides

Multiple Choice

The diagram shows a bond forming between two amino acids. What is the name of this reaction?

• Condensation

• Hydrolysis

• Pepysis

• Oxidation

Multiple Choice

Refers to the three-dimensional structure of an entire amino acid chain in a protein molecule

• tertiary structure
• primary structure
• secondary structure
• fibrous proteins

Multiple Choice

What is the monomer of a protein?

• amino acid
• monosaccharide
• fatty acid
• nucleic acid

Multiple Choice

The name of the initial chain of monomers in a protein is called.....

• polypeptide
• polysaccharide
• polyester
• polynucleotide

Multiple Choice

The two types of folding in the secondary structure are.....

• alpha-helix & beta-pleated sheets
• polypeptide & nucleotide
• globular & fibrous

Multiple Choice

The main bonding in the secondary structure of a protein is due to.....

• covalent bonding
• ionic bonding
• hydrogen bonding
• polar bonding

Multiple Choice

The tertiary structure folding in proteins is primary due to the interactions of....

• the 'R' groups
• the 'P' groups
• the 'A' groups
• the 'S'

Multiple Choice

What is the name of this molecule?

• amino acid
  
• nucleotide
  
• monosaccharide
  
• triglyceride
  

Multiple Choice

The diagram shows the structure of an amino acid. Which type of molecule is formed from amino acids?

• lipids
  
• proteins
  
• carbohydrates
  
• nucleic acids
  

Multiple Choice

The bond between two amino acids is called...

• Peptide bond
• Amino acid bond
• Nothing. There isn't a name for it
• Hydrogen bond

Multiple Choice

tick the correct box

• Secondary - silk, Tertiary - enzymes, Quaternary - haemoglobin

• Secondary - haemoglobin, Tertiary - enzymes, Quaternary - silk

• Secondary - Enzymes Tertiary - haemoglobin, Quaternary - silk

• Secondary - Silk, Tertiary - haemoglobin, Quaternary - enzymes

Multiple Choice

tick the correct box

• Secondary - silk, Tertiary - enzymes, Quaternary - haemoglobin

• Secondary - haemoglobin, Tertiary - enzymes, Quaternary - silk

• Secondary - Enzymes Tertiary - haemoglobin, Quaternary - silk

• Secondary - Silk, Tertiary - haemoglobin, Quaternary - enzymes

Amino acids

open this link and draw the general structure of an amino acid:

https://whiteboard.fi/b3yrk

Open Ended

State the functions of proteins

Function of proteins

State 9 functions of proteins in the body

Function of proteins

• Growth and maintenance

• biochemical reactions: enzymes, blood clotting, muscle contraction

• Messengers: hormones

• Structure: e.g. collagen

• Maintain pH: Zwitterions able to form both cations and anions simultaneously because of ionisable amine and carboxylic acid groups

• Balance water: Zwitterions provide strong hydration through electrostatic interaction with water molecules

• Immunity: imminoglobulins

Function of proteins (cont.)

• Transport and storage: e.g. O2 transport by haemoglobin; casein, principle protein in milk - transports protein from mother to baby in mammals

• Energy: as emergency store only

• 
  

• 
  

• 
  

• 
  

• 
  

Multiple Choice

The primary structure of a polypeptide is maintained by

• Hydrogen bonds

• polypeptide bonds

• Ionic bonds

• Hydrophobic bonds

Multiple Choice

Which of the following statements are true regarding the primary structure of proteins

• Primary structure denotes the number of amino acids in the structure

• The primary structure denotes the sequence of amino acids in the protein

• The primary structure denotes the biological activity of a protein

• All of them

Open Ended

Name the bond or force that is primarily responsible for maintaining secondary structure of a protein

Multiple Select

Which of the following are true regarding the tertiary structure of proteins?

• 3 dimensional structure of a protein

• The biologically active conformation

• The primary structure determines the secondary structure

https://www.abpischools.org.uk/full-screen-animation/887/886

Using the diagram, explain why this structure is said to have a quarternary structure [2]

Open Ended

Describe the structure of collagen [6]