challenge: What is the systematic name of the enzyme D-glycero-beta-D-manno-heptose 1-phosphate adenylyltransferase?
  
  A. ATP:D-glycero-beta-D-manno-heptose 1-phosphate adenylyltransferase
  B. ATP:D-glycero-alpha-D-manno-heptose 1-phosphate adenylyltransferase
  C. GTP:D-glycero-beta-D-manno-heptose 1-phosphate adenylyltransferase
  D. ADP:D-glycero-beta-D-manno-heptose 1-phosphate adenylyltransferase
  Answer: 