Question

Indicate true (T) and false (F) statements below regarding the cellular metabolism of nucleotides and amino acids. Nitrogen fixation occurs in the mitochondria in most animal cells to generate amino acids. All 20 natural amino acids must be provided in our diet and are therefore "essential." There are NO essential nucleotides that must be provided in the diet. Catabolism of amino acids in our body leads to the production of urea which is excreted.

Answer 1

Nitrogen fixation does not occur in the mitochondria, all 20 natural amino acids are essential, there are essential nucleotides in the diet, and catabolism of amino acids leads to the production of urea.

Step-by-step explanation:

True: Nitrogen fixation does not occur in the mitochondria in most animal cells to generate amino acids. It is a process that occurs in microorganisms such as bacteria to convert atmospheric nitrogen (N2) into a usable form for plants and eventually animals.

True: All 20 natural amino acids must be provided in our diet and are therefore considered 'essential' because our bodies cannot synthesize them.

False: There are essential nucleotides that must be provided in the diet. Nucleotides are essential components of DNA and RNA, and they can be obtained through the consumption of foods rich in nucleic acids.

True: Catabolism of amino acids in our body leads to the production of urea, which is excreted as a waste product.