BBL LESSON 1: AMINO ACIDS
QUESTIONS AND VERIFIED
ANSWERS|100% CORRECT|GRADE A+
All amino acids are formed by the amination of
A. Sugars
B. Keto acids
C. Short-chain fatty acids
D. Esters - ANSWER B. Keto acids
The major metabolic source of amino acid precursors is
A. Glycolysis
B. Gluconeogensis
C. TCA Cycle
D. Pentose phosphate pathway - ANSWER C. TCA Cycle
Which amino acid is formed on a t-RNA?
A. Tryptophan
B. Selenocysteine
C. Methionine
D. Alanine - ANSWER B. Selenocysteine
All amino acids have an R group. What is the significance of the R?
A. Each of the 21 amino acids has a unique R group
B. Proline and glycine are the only amino acids without an R group
C. All R groups have charge
D. Not all R groups are bound to the alpha carbon - ANSWER A. Each of the 21 amino acids has a unique
R group
, At neutral pH, all amino acids are
A. Uncharged, and non-reactive
B. Zwitterionic, with both the amine and carboxylic acids charged
C. Deprotonated at the carboxylic acid
D. Protonated at the amine group - ANSWER B. Zwitterionic, with both the amine and carboxylic acids
charged
What makes each of the 21 amino acids found in protein unique?
A. The carboxylic acid and the amine group
B. The presence of the alpha carbon
C. The chemistry of the unique R groups found in each
D. All of the above - ANSWER C. The chemistry of the unique R groups found in each
Protein concentration can be measured by UV light absorbance at 280 μm because of the presence of
which amino acids?
A. Polar amino acids
B. Non-polar amino acids
C. Acid or basic amino acids
D. Aromatic amino acids - ANSWER D. Aromatic amino acids
Why is selenocysteine an uncommon amino acid only found in protein?
A. It contains both a seleno group and a sulfide group
B. It is the only non-polar amino acid
C. Selenium is substituted for sulfide to form selenocysteine on the unique sec-t-RNA
D. All of the above - ANSWER C. Selenium is substituted for sulfide to form selenocysteine on the unique
sec-t-RNA
At neutral pH, what is true about the ionization of an amino acid?
A. The R group is uncharged
B. The amino group is protonated but the carboxyl group becomes deprontonated
QUESTIONS AND VERIFIED
ANSWERS|100% CORRECT|GRADE A+
All amino acids are formed by the amination of
A. Sugars
B. Keto acids
C. Short-chain fatty acids
D. Esters - ANSWER B. Keto acids
The major metabolic source of amino acid precursors is
A. Glycolysis
B. Gluconeogensis
C. TCA Cycle
D. Pentose phosphate pathway - ANSWER C. TCA Cycle
Which amino acid is formed on a t-RNA?
A. Tryptophan
B. Selenocysteine
C. Methionine
D. Alanine - ANSWER B. Selenocysteine
All amino acids have an R group. What is the significance of the R?
A. Each of the 21 amino acids has a unique R group
B. Proline and glycine are the only amino acids without an R group
C. All R groups have charge
D. Not all R groups are bound to the alpha carbon - ANSWER A. Each of the 21 amino acids has a unique
R group
, At neutral pH, all amino acids are
A. Uncharged, and non-reactive
B. Zwitterionic, with both the amine and carboxylic acids charged
C. Deprotonated at the carboxylic acid
D. Protonated at the amine group - ANSWER B. Zwitterionic, with both the amine and carboxylic acids
charged
What makes each of the 21 amino acids found in protein unique?
A. The carboxylic acid and the amine group
B. The presence of the alpha carbon
C. The chemistry of the unique R groups found in each
D. All of the above - ANSWER C. The chemistry of the unique R groups found in each
Protein concentration can be measured by UV light absorbance at 280 μm because of the presence of
which amino acids?
A. Polar amino acids
B. Non-polar amino acids
C. Acid or basic amino acids
D. Aromatic amino acids - ANSWER D. Aromatic amino acids
Why is selenocysteine an uncommon amino acid only found in protein?
A. It contains both a seleno group and a sulfide group
B. It is the only non-polar amino acid
C. Selenium is substituted for sulfide to form selenocysteine on the unique sec-t-RNA
D. All of the above - ANSWER C. Selenium is substituted for sulfide to form selenocysteine on the unique
sec-t-RNA
At neutral pH, what is true about the ionization of an amino acid?
A. The R group is uncharged
B. The amino group is protonated but the carboxyl group becomes deprontonated
