4. Many beneficial drugs work by inhibiting enzymes. Penicillin blocks an enzyme that bacteria use in making cell walls. Ibuprofen inhibits an enzyme involved in sending pain signals. Many cancer drugs inhibit enzymes that promote cell division. (3.5 pt.) a. Recall the two mechanisms of enzyme inhibition. Which of these alters the shape of the enzyme? (1 pt.) b. Nerve gases (a form of chemical warfare) irreversibly bind to the active site of an enzyme called acetylcholinesterase vital to transmitting nerve impulses, leading to rapid paralysis and death. What mechanism of enzyme inhibition is exemplified? (1 pt.) c. The enzyme acetylcholinesterase normally binds the neurotransmitter acetylcholine and breaks it down to acetic acid and choline. What is the enzyme’s substrate(s)? What is the enzyme’s product(s)? (1.5 pt.)

a. Non-Competitive

b. Competitive

c. The substrate is acetylcholine. The products are acetic acid and choline.

Explanation:

a. Non-Competitive. Here, the inhibitor binds to the enzymes allosteric site. This action changes the shape of the enzymes active site, so that it can no longer bind to the correct substrate.

b. Competitive. Here, the inhibitor binds directly to the enzymes active site, thereby blocking other substrates.

c. A "substrate" is the molecule that binds to an enzyme. The "product" is what the enzyme produces after it acts upon the substrate.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation:

b 04545