Topic 4: Proteins and Enzymes

Amino acids can be classified based on what properties?

• if they are non-polar, aliphatic

• Aromatic

• Essential or non-essential

• All of the above

Essential amino acids are........

• Amino acids that an organism is not able to synthesise

• Amino acids that an organism can synthesise

• Amino acids produced from other amino acids

Amino acids have a carboxyl and amino group, the amino has a basic pKa,

• TRUE

• FALSE

Tags

NGSS.HS-LS1-6

Peptides are.....

• Small chains of amino acids

• Larger than 10kDa

• non essential and serve no biological purpose

The functional structure of a protein is called what?

• Edman shape

• Beta sheet

• native fold

• MALDI

Which kind of helix is the alpha-helix?

• Left handed

• Right handed

Beta sheet like arrangements are held together by which bond between backbone amides?

• Van der Waals

• Ionic

• Hydrogen

• Metallic

Proteins can be denatured by which of the following?

• pH

• heat or cold

• Organic solvents

• All of the above

Hsp70 and Hsp90 are examples of what?

• Prions

• Aggregates

• Protein chaperones

• Fibrous proteins

Concerning Protein turnover and proteostasis, the half life of a protein depends on which factor?

• 3D structure

• C-term composition

• N-term composition