The urea cycle occurs in the kidneys.

The urea cycle helps remove toxic ammonia from the body.

ATP is not required for the urea cycle.

Ornithine is a key intermediate that is regenerated in the urea cycle.

What is the main purpose of the urea cycle?

• To produce ATP
• To remove excess nitrogen from the body
• To convert glucose into energy
• To synthesize amino acids

Which process removes the amino group from an amino acid?

• Transamination
• Deamination
• Decarboxylation
• Condensation

Which of the following is a product of amino acid catabolism?

• Urea
• Glycogen
• Fatty Acids
• ATP only

What is the fate of excess nitrogen from amino acids?

• Converted into proteins
• Stored in muscle tissue
• Used for ATP synthesis
• Excreted as urea in the urine

What is the major organ responsible for amino acid metabolism?

• Brain
• Kidney
• Liver
• Pancrease

Which amino acid is a key nitrogen donor in biosynthesis reactions?

• Glutamate
• Serine
• Alanine
• Cysteine

What is the fate of the carbon skeleton of amino acids after deamination? Answer: ________ production.

• energy

• ATP