EXAM3 - Score (10 pts) Rank Biochemistry 411-504 Exam III...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1. The Urea Cycle is a major mammalian pathway for ridding nitrogen. Put a number in the blank. a) 1 ___number of CO 2 molecules required to make one molecule of urea b) 1 ___number of NH 4 + from glutamate required to make one molecule of urea c) 6 ___number of ATPs required to make TWO molecules of urea d) 3 ___number of urea molecules produced from three L-arginine molecules e) 0 ___number of pyridoxal-requiring enzymes in the urea synthesis pathway 2. Identify the amino acid that is required to form the final product. The reactions are not drawn in their complete form. Glutamate Glycine Glutamine Aspartate Serine Biochemistry 411-504 Exam III April 24, 2002 Name I.D. Score Rank CH 3 CH 2 C H 3 C C COO NH 3 + H CH 3 CH 2 C H 3 C C O COO H H α -Ketoisocaproate L-Leucine Am ino acid? + Am ino acid? O OOC CH 2 CH 2 C CoA O OOC CH 2 CH 2 C CH 2 NH 2 δ -am inolevulinic acid O OH HO CH 2 OPO 2 PO 3 P O O O O O OH HO CH 2 P O O O O NH 2 + Am ino acid + Am ino acid Ribose-5-PO 4 H O N N N N Ribose-5-PO 4 NH 2 N N N N H Am ino acid? H 2 O Indole L-Tryptophan N CH 2 C COO NH 3 H + N (10 pts) (10 pts)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. What is the biochemical function of uroporphyrinogen III cosynthase in heme synthesis. What are the consequences if this enzyme is missing? (Hint: if his physician had been an AGGIE, the king would have been diagnosed as having “maroon urine”) During closure inverts ring 4 on porphobilinogen to form uroporphyrinogen III
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

EXAM3 - Score (10 pts) Rank Biochemistry 411-504 Exam III...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online