1. What is an enzyme?2. What is the function of an enzyme?3. Which graph would represent enzymeactivityEnergy|CO, + H,OHCO3 +HTProgress of Reaction4. What are the six classes of enzyme?5. Explain a competitive inhibitorIn the induced-fit model, what happens tothe shape of the enzyme when the substratebinds?A. stays the sameB. adapts to the shape of thesubstrate35) An irreversible inhibitor is one thatA) forms hydrogen bonds with the substrate.B) binds to the enzyme with hydrophobicinteractions.C) reacts covalently with the substrate.D) binds covalently to the enzyme active site.E) reacts covalently with a cofactor.47) Metal ions such as Zn²+ and Fe3+ are oftenneeded by enzymes asA) isozymes.B) allosteres.C) inhibitors.D) cofactors.E) substrates.8) The optimum pH for the activity of trypsin isaboutA) 2.0B) 4.0C) 6.5D) 7.4E) 8.03) An enzyme that converts a cis double bond to atrans double bond is classified as a(n).A) oxidoreductaseB) transferaseC) hydrolaseD) lyaseE) isomerase3) An enzyme that converts a functional group toanother between two structuresA) oxidoreductaseB) transferaseC) hydrolaseD) lyaseE) isomeraseWhat is the function of these enzymes:OxidoreductaseTransferaseDecarboxylase132) When an end product from an enzyme-mediatedsequence is also an inhibitor for an earlier step in thereaction sequence, the process is referred to asA) feedback control.B) competitive inhibition.C) irreversible inhibition.D) negative catalysis.E) concentration control.

This chapter is from Biochemistry. As per Bartleby guideline I can provide answers for first 3 questions.1) Enzyme is a biological catalyst which is made up of protein and accelerates the chemical reaction. Enzyme increases the rate of biochemical reaction. All enzymes are protein but not all proteins are enzyme. 2) Enzyme has many roles in all biological activities. Enzyme catalises many biochemical reaction in our body. Enzyme requires in blood clotting, growth, healing, disease and reproduction. Enzyme is essential for digestion, liver , removing toxin , muscle growth etc. Enzyme increases the rate of a biochemical reaction. Enzyme helps in signal transduction Enzyme breaks larger molecules into simpler molecules and generate ATP in the body.3) The minimum amount of energy required to convert reactant to produt is known as activation energy. The role of enzyme is to reduce that activation Energy for substrate and making reaction faster rate. From the above Graph as mentioned in the question , the lower line that is the pink line represents enzyme activity. The pink line in the graph represents the activation energy of reactant in presence of enzyme.