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UNE biochem Unit 4 exam with correct answers
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UNE biochem Unit 4 exam
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UNE biochem Unit 4 examUbiquitination is a means of targeting a protein for which of the following cellular
processes? - Answers -Proteasomal degradation
The reaction of ammonia with a-ketoglutarate is catalyzed by_______ and requires
________ as a reactant? - Answers -Glutamate dehydrogenase; NADH or NADPH
Most enzymes involved in a protein digestion require cleavage for activation. These
proteins are secreted as inactive protein forms called: - Answers -Zymogens
The urea cycle takes place in which of the following sub cellular locations? - Answers -
the cytosol and mitochondria
Which of the following amino acids is considered non essential because its generated
by the urea cycle? - Answers -arginine
Which of the following enzymes is regulated by N-acteyl glutamate (NAGs)? - Answers -
CPS I
Which of the following enzymes is correctly paired with its activator? - Answers -N-
acetylglutamate synthase; arginine
Which of the following enzymes will be active in both the fed and fasted state? -
Answers -Glutaminase
Which of the following compounds stimulates the synthesis of N-acetylglutamate? -
Answers -arginine
Which of the following statements is consistent with nitrogen transport in the fasted
state - Answers -Glutaminase will be active
Which of the following is the primary role of glutaminase in the liver? - Answers -to free
an amine group from glutamine
in the case of urea cycle deficiency, which of the following amino acids may become
essential? - Answers -arginine
When is the process of autophage most likely occurring in the cell? - Answers -When
there is low energy in the cell; ratio of AMP/ATP >1
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