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Amino Acid Questions

Quiz by kitkat90009
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Last updated: February 21, 2020
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First submittedFebruary 21, 2020
Times taken17
Average score40.0%
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Hint
Answer
Histidine has an ..... R group
Imidazole
Cysteine can partially meet the need for ..... since they both contain sulfur
Methionine
Tyrosine can partially meet the need for .....
phenylalanine
Which amino acid can form disulfide bonds
Cysteine
Which amino acid is an imino acid
proline
Except glycine, all amino acids are L or D amino acids
L
...... are non superimposable mirror images (another word for stereoisomers
Enantiomers
The acid and amino groups in amino acids are capable of ionising, and they can act as both an acid and base, therefore they are called...
Amphoteric
Hint
Answer
What is physiological pH
7.4
At physiological pH, the carboxyl group will be..... (negatively charged
Unprotonated
At physiological pH, the amino group will be.... (positively charged
protonated
When the net charge is zero, this is known as the.....
Isoelectric point
When the pH of an amino acid solution changes, so does the.....
Net charge
Amino acids can have both positively and negatively charged groups on the same molecule, therefore they are known as....
Zwitterions
In a condensation reaction, a peptide bond is formed and ..... is lost
Water
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