Which is true regarding heme? which is true regarding heme? the binding of an oxygen molecule to the iron in a heme unit is completely reversible. each heme unit holds an iron ion in such a way that the iron can interact with a hydrogen molecule. like myoglobin, each hb chain contains four molecules of heme. heme is a complex of protein pigments?

Different isotopes indicate that an element will have different numbers of

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.