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Ornithine Cycle

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Ornithine cycle process flashcard. OCR A: A level biology revision notes. Module 5: Communication, Homeostasis and Energy. A* biology student's notes. Summary of key content to be memorised. Process that needs to be memorised from specification.

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Ornithine Cycle: Ornithine Cycle:
Excess amino acids in the liver
undergo deamination.
This produces keto acids (that
can be used in respiration) &
ammonia.
Ammonia is carboxylated (+ CO2)
& undergoes a condensation
reaction (- H2O) to produce
Citrulline.
Citrulline reacts with ammonia
(+ NH3) & undergoes a
condensation reaction (- H2O) to
produce arginine.
Arginine is hydrolysed (- H2O) to
produce orthenine (an amino
acid not used in proteins) &
urea.
Urea is an excretory product that
will be removed by the kidneys.

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Study Level: A/AS Level
Examinator: OCR
Subject: Biology A
Unit: Unit 5

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Uploaded on: December 4, 2023
Number of pages: 1
Written in: 2022/2023
Type: OTHER
Person: Unknown

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ornithine cycle
deamination
amino acids
urea
biology
a level
ocr a
module 5
homeostasis
communication
energy
flashcard
process

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