30 Questions
Which of the following is NOT a source of dietary protein?
Fruits
Where does the digestion of dietary protein mainly occur?
Small intestine
What is the function of ubiquitin in protein metabolism?
Marking proteins for degradation
What is the result of protein turnover in the body?
No net change in protein levels
How are amino acids absorbed in the small intestine?
As oligopeptides and single amino acids
What is the term for the process of marking proteins for degradation?
Polyubiquitination
What is the primary source of amino acids when demand is met?
Dietary protein
What is the role of proteolysis in amino acid metabolism?
Breaking down existing proteins to provide energy
What is the primary fate of amino acids absorbed from dietary protein?
Used for protein synthesis
Why would we limit the use of protein as a source of energy?
Protein is needed for other bodily functions
What is the role of glutamate dehydrogenase in amino acid metabolism?
Deaminating amino acids
What is the primary function of the urea cycle?
Removing ammonia from the body
What are the two main sources of amino acids?
Diet and protein degradation
Where does the breakdown of dietary protein occur?
Small intestine
What is the primary function of the urea cycle?
To excrete excess amino acids as urea
During short-term starvation, what is used to provide energy?
Muscle
What is the purpose of transamination?
To convert ketoacids to amino acids
What is the name of the cycle that converts excess amino acids to urea?
Urea cycle
What is the main site where digestion of dietary protein primarily occurs?
Stomach
Which of the following statements about amino acid absorption is TRUE?
Amino acids leave the apical side of enterocytes
Which of these processes involves the removal of an amino group from an amino acid?
Deamination
What is the function of ubiquitin in protein metabolism?
Marking proteins for degradation
Where do cytological peptidases degrade absorbed oligopeptides?
Intestinal lumen
In protein metabolism, what is the process by which amino acids are newly formed?
Amination
What is the primary source of essential amino acids?
Diet
What is the process by which amino acids are broken down into their carbon skeletons and reused in metabolism?
Carbon skeleton reuse
What is the name of the process by which proteins are broken down into amino acids?
Ubiquitin-mediated proteolysis
What is the purpose of de novo protein synthesis?
To synthesize new proteins from amino acids
What is the byproduct of the digestion of dietary protein?
Amino acids
What is the function of the urea cycle?
To remove excess ammonia from the body
Test your knowledge on the process of converting proteins to amino acids in Medical Physiology. Learn about exogenous and endogenous sources of dietary protein, digestion in the small intestine, and absorption into the bloodstream.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
