Calculating the molecular weight and subunit organization of a protein from its metal content the element molybdenum (atomic weight 95.95) constitutes 0.08% of the weight of nitrate reductase. if the molecular weight of nitrate reductase is 240,000, what is its likely quaternary structure?

Dimer of two peptide chains with 1 mole of molybdenum metal each.

Explanation:

Percentage of molybdenum in protein = 0.08%

Molecular mass of nitrate reductase = 240,000 g

Mass of molybdenum = x

Moles of molybdenum =

Each peptide chain of nitrate reductase contain 1 mole of molybdenum.

This means that nitrate reductase is composed of to two peptide chains. And in each peptide there is a single mole of molybdenum metal.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.