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UNE Biochemistry Unit 4 Exam Questions and Answers 100% Pass

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UNE Biochemistry Unit 4 Exam Questions and Answers 100% Pass Which of the following amino acids is considered non essential because it is generated by the urea cycle? A. arginine B. lysine C. asparagine D. glutamine E. histidine - arginine The urea cycle takes place in which of the followin...

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  • January 8, 2025
  • 34
  • 2024/2025
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  • UNE Biochemistry
  • UNE Biochemistry
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EmilyCharlene
UNE Biochemistry Unit 4 Exam
Questions and Answers 100% Pass

Which of the following amino acids is considered non essential because it is generated by the urea cycle?




A. arginine




B. lysine




C. asparagine




D. glutamine




E. histidine - ✔✔arginine


The urea cycle takes place in which of the following subcellular locations?




A. the cytosol and the mitochondria




EMILY CHARLENE © 2025, ALL RIGHTS RESERVED 1

,B. the mitochondria only




C. the cytosol only - ✔✔the cytosol and the mitochondria


Ubiquitination is a means of targeting a protein for which of the following cellular proceses?




A. Digestion




B. Proteasomal degradation




C. Storage




D. Protein translation - ✔✔Proteasomal degradation


The reaction of ammonia with α-ketoglutarate is catalyzed by _________ and requires _________ as a

reactant.




A. glutamate dehydrogenase; ATP




B. glutamate dehydrogenase; NADH or NADPH




C. glutamate synthetase; NADH or NADPH




EMILY CHARLENE © 2025, ALL RIGHTS RESERVED 2

,D. glutamate synthetase; ATP - ✔✔glutamate dehydrogenase; NADH or NADPH


Most enzymes involved in protein digestion require cleavage for activation. These proteins are secreted

as inactive protein forms called:




A. zymogens




B. unfolded polypeptides




C. dimers




D. activated forms - ✔✔zymogens


Which of the following enzymes is regulated by N-acetyl glutamate (NAGs)?




A. CPS II




B. ornithine transcarbamylase




C. arginosuccinate lyase




EMILY CHARLENE © 2025, ALL RIGHTS RESERVED 3

, D. CPS I - ✔✔CPS I


Which of the following enzymes will be active in both the fed and fasted states?




A. Glutaminase




B. Pyruvate kinase




C. Hormone sensitive lipase




D. Glycogen synthase - ✔✔Glutaminase


Which of the following enzymes is correctly paired with its activator?




A. N-acetylglutamate synthtase; arginine




B. Carbamoyl phosphate synthetase I; ATP




C. Glutaminase; citrate




D. arginase; NADH - ✔✔N-acetylglutamate synthtase; arginine


Which of the following statements is consistent with nitrogen transport in the fasted state?




EMILY CHARLENE © 2025, ALL RIGHTS RESERVED 4

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