NUTR 280 EXAMS SCRIPT 2025/2026 QUESTIONS AND
ANSWERS RATED A+
✔✔Tryptophan - ✔✔precursor for serotonin
✔✔Tyrosine - ✔✔precursor for epinephrine
✔✔Nonessential amino acids - ✔✔a group of amino acids that the body can make
✔✔Essential amino acids (EAAs) - ✔✔amino acids that the body CANNOT make/make
enough of to meet its needs
✔✔Conditionally essential amino acid - ✔✔normally nonessential, but become essential
under a certain condition
✔✔High-quality proteins - ✔✔complete proteins that are well-digested, absorbed, and
used by the body
✔✔Complete protein - ✔✔a food source of protein that contains an adequate proportion
of each of the 9 EAAs
- meat, fish, poultry, eggs, dairy products
- NOT plant foods except quinoa and soy protein
✔✔Low-quality protein - ✔✔incomplete and generally less digestible, making their
amino acids less bioavailable than high-quality proteins
✔✔Incomplete protein - ✔✔food source of protein that contains inadequate amounts of
one or more of the essential amino acids
✔✔Limiting amino acid - ✔✔the essential amino acid found in the lowest concentration
in an incomplete protein
✔✔What are the characteristics of a limiting amino acid? - ✔✔- If the body does not
have an adequate amount of all the amino acids required to make a particular protein,
that protein cannot be synthesized
- Reduces the body's ability to support growth, repair, and maintenance of tissues
✔✔What characeristics are found in people with positive nitrogen balance? -
✔✔Growth, pregnant women, and body building
✔✔What characeristics are found in people with zero nitrogen balance? -
✔✔maintaning, most adults
ANSWERS RATED A+
✔✔Tryptophan - ✔✔precursor for serotonin
✔✔Tyrosine - ✔✔precursor for epinephrine
✔✔Nonessential amino acids - ✔✔a group of amino acids that the body can make
✔✔Essential amino acids (EAAs) - ✔✔amino acids that the body CANNOT make/make
enough of to meet its needs
✔✔Conditionally essential amino acid - ✔✔normally nonessential, but become essential
under a certain condition
✔✔High-quality proteins - ✔✔complete proteins that are well-digested, absorbed, and
used by the body
✔✔Complete protein - ✔✔a food source of protein that contains an adequate proportion
of each of the 9 EAAs
- meat, fish, poultry, eggs, dairy products
- NOT plant foods except quinoa and soy protein
✔✔Low-quality protein - ✔✔incomplete and generally less digestible, making their
amino acids less bioavailable than high-quality proteins
✔✔Incomplete protein - ✔✔food source of protein that contains inadequate amounts of
one or more of the essential amino acids
✔✔Limiting amino acid - ✔✔the essential amino acid found in the lowest concentration
in an incomplete protein
✔✔What are the characteristics of a limiting amino acid? - ✔✔- If the body does not
have an adequate amount of all the amino acids required to make a particular protein,
that protein cannot be synthesized
- Reduces the body's ability to support growth, repair, and maintenance of tissues
✔✔What characeristics are found in people with positive nitrogen balance? -
✔✔Growth, pregnant women, and body building
✔✔What characeristics are found in people with zero nitrogen balance? -
✔✔maintaning, most adults
