Which of the following biochemical pathways delivers amino nitrogen from muscle cells to the liver to be disposed of in urea molecules? a. Krebs bicycle b. Cori cycle c. purine cycle d. glucose–alanine cycle
Which of the following biochemical pathways delivers amino nitrogen from muscle cells to the
liver to be disposed of in urea molecules?
a. Krebs bicycle
b. Cori cycle
c. purine cycle
d. glucose–alanine cycle
Additional ammonia is transformed to urea. Water and urea are expelled from the liver cells into the bloodstream and transferred the kidneys and then urea is passed out of the body in the urine
The alanine cycle or glucose-alanine cycle, is the sequel of responses in which amino groups and carbons from muscle are carried to the liver.
Answer : d. glucose–alanine cycle
Explanation for the answer:
This glucose-alanine cycle, is very less productive than the Cori cycle, which utilizes lactate, from alanine, output of urea. Disposal of the urea is energy-dependent, compelling four high-energy phosphate bonds thus the net ATP generated is less than that establish in the Cori cycle
The glucose–alanine cycle finally fulfills as a method of relieving the muscle tissue of the toxic ammonium ion, as well as indirectly contributing glucose to energy-deprived muscle tissue. Under lengthy periods of fasting, skeletal muscle can be lessened for use as an energy source to enhance the glucose being generated from the breakdown of glycogen.
The other purposes, such as the recycling of carbon skeletons in skeletal muscle and the liver and participation in the carrier of ammonium to the liver and modification into urea , also fulfills by the alanine cycle .
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