Consider this mechanism: Step 1: M + X MX
→
Step 2: MX + A
D+X
What is the species MX?
O A. catalyst
B.
inhibitor
O C.
reactant
D. product
O E.
intermediate

What is common about these molecules? a.their atoms are held together by covalent bonds. b.they are all made up of the same two atoms. c.their atoms are held together by ionic bonds. d.they are all made up of oxygen atoms only.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth