Question

which one is not a standard amino acid but is found in the urea cycle? Please...

which one is not a standard amino acid but is found in the urea cycle? Please explain.

malate

oxaloacetate

arginine

ornithine

Homework Answers

Answer #1

Ornithine is not a standard amino acid, but is an integral part of the urea cycle. Ornithine is produced as one of the products of the action of arginase enzyme of L-arginine to create urea. Ornithine aids in the removal of excess nitrogen from the body and is recycled by the urea cycle, thereby acting as a catalyst. However, ornithine is not coded by DNA and hence, is not a standard amino acid. The structure of ornithine is shown below.

Structure of ornithine (taken from internet sources)

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
7. In which ONE of the following are amino groups from protein degradation secreted from the...
7. In which ONE of the following are amino groups from protein degradation secreted from the body? a. ammonium b. uric acid c. glutamine d. urea e. glutamate 8. If an amino acid is glucogenic this means which ONE of the following? a. can be used instead of glucose b. stimulates release of glucagon from the pancreas c. can be used to synthesise glucose d. can be synthesised from glucose e. is essential in the diet 9. Ammonium (NH4+) can...
Draw a picture of the Urea Cycle Include: All 5 steps of Urea Cycle Where amino...
Draw a picture of the Urea Cycle Include: All 5 steps of Urea Cycle Where amino groups enter ATP, NADH, ETC Locations
3) For the de novo synthesis of the amino acids: a) Which 10 amino acids are...
3) For the de novo synthesis of the amino acids: a) Which 10 amino acids are derived from the citric acid cycle intermediates -ketoglutarate and oxaloacetate? b) Which nine amino acids are derived from the glycolytic intermediates 3-phosphoglycerate, PEP and pyruvate? c) Which amino acid is derived by consequence of pentose phosphate pathway?
a) Which amino acid(s) can make ionizable interactions with Tyrosine? b) Which amino acid(s) can make...
a) Which amino acid(s) can make ionizable interactions with Tyrosine? b) Which amino acid(s) can make ionizable interactions with Arginine? c) Which amino acid(s) can make ionizable interactions with Histidine? d) Which amino acid(s) can make ionizable interactions with Cysteine? For example, Aspartate and Glutamate can make ionizable interactions with Lysine.
1.Amino acid breakdown, backbone of amino acid could submit to which intermediates in TCA cycle (answer...
1.Amino acid breakdown, backbone of amino acid could submit to which intermediates in TCA cycle (answer all) 2.What is the type of shuttle that used to transport fatty acid between organelle ? 3.Proteosomal degradation uses …. ....….. to mark target protein prior committed to degradation. 4.Glycogenin is a protein primer used to build glycogen produce from which amino acid?  
The step that completes the citric acid cycle is the conversion of malate (M) to oxaloacetate...
The step that completes the citric acid cycle is the conversion of malate (M) to oxaloacetate (OA) by NAD+. The two redox half cells that are coupled for this reaction are oxaloacetate + 2 H+ + 2 e- double arrow malate, ε°’ = -0.166 V and NAD+ + H+ + 2 e- double arrow NADH, ε°’ = -0.320 V. What is the equilibrium constant Keq’ for the conversion of M to OA by NAD+?
how many alanine and glutamine need to be metabolized to produce urea, no other amino acid...
how many alanine and glutamine need to be metabolized to produce urea, no other amino acid is inteoduced to system is assumption?
What role does the citric acid cycle play in amino acid metabolism? Group of answer choices...
What role does the citric acid cycle play in amino acid metabolism? Group of answer choices breakdown of glucogenic amino acids feeds metabolites into the citric acid cycle amino acid synthesis often relies on intermediates of the citric acid cycle breakdown of ketogenic amino acids feeds metabolites into the citric acid cycle a, b, & c a & b
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the...
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the free energy change for this reaction at 37.0 °C (310 K). ΔG°\' for the reaction is 29.7 kJ/mol. Assume that the reaction occurs at pH 7. [malate] = 1.15 mM [oxaloacetate] = 0.140 mM [NAD ] = 170 mM [NADH] = 68 mM
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the...
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the free energy change for this reaction at 37.0 °C (310 K). ΔG°\' for the reaction is 29.7 kJ/mol. Assume that the reaction occurs at pH 7. [malate] = 1.53 mM [oxaloacetate] = 0.260 mM [NAD ] = 250 mM [NADH] = 1.0 × 102 mM