Quiz Amino Acid

The number of amino acids used to produce proteins for all living things is:

• 20
• ∞
• 15
• 42

Which of these structures is a zwitterion?

• 
• 
• 

Why are many enzymes soluble in water?

• They contain large numbers of hydrogen bonds

• They contain many amino acids with hydrophilic side chains

• they contain an active site

Which one is an acidic amino acid?

• 
• 

What are the building blocks of proteins?

• amino acid
• fatty acid
• nucleotide
• lipid

The amino acid that results in disulphide bridges is:

• Cysteine
• Alanine
• Glutamic Acid
• Valine

The bond that joins amino acids are called:

• Peptide Bonds
• Ester Bonds
• Glycosidic Linkages
• Phosphodiester Bonds

If a methyl group (-CH₃), which does not like water, were at the 'R', the amino acid would likely be:

• Hydrophobic

• Hydrophilic

• Ionic

• Acidic

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

• Dehydration Synthesis
• Hydrolysis
• Pepysis
• Oxidation

What's the correct definition of these keywords?

zwitterions

• Amino acid molecules with a negative charge on the amine group in the form of COO- and a positive charge on the carboxylic acid group in the form of NH3+

• Amino acid molecules with a positive charge on the amine group in the form of NH3+ and a negative charge on the carboxylic acid group in the form of COO-
  

• Amino acid molecules with a negative charge on the amine group in the form of NH3- and a positive charge on the carboxylic acid group in the form of COO+