1. Many heavy metals like Lead, Mercury,and Chromium will function as
Competitive inhibitors.
Noncompetitive inhibitors.
Hormones.
Second messengers.

2. The area on the enzyme where the substrate or substrates attach to is called the
Dry dock.
Allosteric site.
Regulatory site.
Active site.

3. Communication of information between neurons is accomplished by movement of chemicals (neurotransmitters) across a small gap called .
The synapse.
Cholinergic transit gap.
Muscarinic transport gap.
Protein junction.

4. Nerve agents bind to part of the acetylcholinesterase (AChE) molecule. This makes the AChE
Jumpy.
Inactive.
Faint.
Competitive.

5. The great specificity of the AChE active site means
Only a few compounds besides ACh will bind at the active site.
Only with allosteric activation will anything bind at the active site.
Compounds with high activation energy will bind at the active site.
That statement is not correct. The site is not that specific, many compounds of a vaguely similar structure will bind at the active site.

6. Cyclic AMP is a
source of energy
hormone
second messenger within the cell
transactive peptide.

7. The effect of a chemical is assumed to be proportional to:
The dose.
The AUC.
The fraction absorbed.
All of the above.

8. The volume of distribution of xenobiotic chemicals is about 55 l in a 70 kg adult. T/F

9. Lipid-soluble toxicants are often stored in
Adipose tissues.
Liver.
Bone.
All of the above.

10. Binding of a xenobiotic chemical to an enzyme's allosteric site might
Increase the enzymes production.
Decrease the enzyme production.
Have no effect on the enzyme production.
That would depend on the enzyme and the xenobiotic.