Originating from a source outside of the body
What will be an ideal response?
Exogenous
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Why doesn't the stomach acid just digest right through the wall of the stomach?
A. The lining of the stomach is protected by mucus. B. Food prevents the acid from digesting the wall of the stomach. C. The pH of the stomach acid is not low enough to be able to digest the lining. D. Neutralizers are imbedded in the stomach lining. E. It does, we just rebuild the layers faster than they can be digested.
Why might a pine seed not have a wing to disperse via air currents?
A) adapted to grow near parent tree B) wing adapted to provide extra protection C) lack of a seed coat on the pine seed D) spread via birds instead
Which refers to an organic, nonpolypeptide compound that binds to the apoenzyme and serves as a
cofactor? a. coenzyme b. catalyst c. substrate d. mineral e. allosteric regulator
Exotoxins:
A. Are made of protein B. Are always enzymes C. Are present in Gram-positive bacteria only D. All of the above E. None of the above