Nitrogen

Question 1

What do amino acids and nucleotides contain that carbohydrates and fats do not

Answer 1

Nitrogen

Question 2

What is phenylketonuria

Answer 2

When there is an absence of phenylalanine hydroxylase so there is a build up of phenylalanine and a deficiency of tyrosine. This creates phenyl ketones that spill over. Some of these products cross blood brain barrier and cause irreversible damage to brain

Question 3

Ammonia is produced by

Answer 3

Break down of amino acids NH4

Question 4

What does urea cycle do

Answer 4

Takes ammonia and converts it into urea and excretes it in Urine. Way of detoxifying ammonia

Question 5

what are essential amino acids

Answer 5

cannot be synthesised by body so need to be consumed

Question 6

how is nitrogen transferred between amino acids

Answer 6

by oxidative deamination and transamination reactions

Question 7

glutamine

Answer 7

protein that is transported through plasma to liver

Question 8

alanine

Answer 8

protein that is transported to liver from skeletal muscle

Question 9

what does transport of alanine provide

Answer 9

safe movement of carbon from pyruvate for regeneration of glucose

Question 10

glutamate

Answer 10

nitrogen fixes to glutamate and flows to other biomolecules. only amino acid that can obtain nitrogen directly from ammonium ions,

Question 11

what point does urea get produced in the cycle

Answer 11

between arganine and ornithine