Proteins may act as buffers because the free carboxyl group can release hydrogen ions.
a) the free carboxyl group can combine with hydrogen ions.
b) the free carboxyl group can act as a base.
c) the free amino group can release hydrogen ions.
d) the free amino group can act as an acid.

The activity of the modern sample is 1.10 bq . how long does that measurement take?

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer