Remaining Time: 50 minutes, 56 seconds. Question Completion Status: QUESTION 20
ID: 195380 • Letter: R
Question
Remaining Time: 50 minutes, 56 seconds. Question Completion Status: QUESTION 20 Enzymes that are secreted by a cell to hydrolyze reactions are Apoenzymes O Exoenzymes O Constitutive enzymes O Regulated enzymes O Endoenzymes QUESTION 21 An apoenzyme O Is part of a simple enzyme O Is also called a coenzyme O Is the protein part of a holoenzyme O Is ofen an norganic metal ion O Is an RNA molecule QUESTION 22 Microbes can utilize only carbohydrates for energy produc O True O False QUESTION 23 Each of the following are true of enzymes except O They can be used over and over O They may or may not require cofactors O Their active site is specific to the substrate of a reaction Al of the choices are true of enzymes QUESTION 24 During aerobic cellular respiration, the final electron ac O Pyruvic acid O Oxygen Nitrate O Cytochrome c acceptor is FADExplanation / Answer
Answer 20: Exoenzymes
Explanation: Enzymes that work inside the cell are endoenzymes, apoenzymes are protein part of holoenzymes. Enzymes that are always present regardless of the substrate are constitutive enzymes.
Answer 21: Is the protein part of a holoenzyme
Answer 22: False
Explanation: Microbes can use compounds, other than carbohydrates for energy production.
Answer 23: They increase the activation energy of a reaction
Explanation: Enzymes decrease the activation energy, thus they increase the rate of reaction
Answer 20: Oxygen
Explanation: In the electron transport chain, oxygen is the final electron acceptor. Oxygen is a highly oxidizing agent, hence it is an excellent electron acceptor