Which of these is not true about enzymes? A. Most of them are proteins B. Are changed at the end of the reaction C. Can only speed up the rate of the reaction D. Very specific in function E. Work better in specific medium

For reactions to occur there needs to be what level of substrate and enzyme concentrations? Select one: a. Greater amount of substrate b. Lower amount of substrate c. Just the right amount of substrate

½ O₂ + 2H+ +2 e → H₂O FAD + 2H+ + 2e → FADH₂ E'º = 0.816V E'º = -0.219V Calculate the AG" of the following reaction: FAD + H₂O → FADH₂ + 1/2 0₂. A. -200 kJ/mol B. -100 kJ/mol C. 50 kJ/mol D. 100 kJ/mol E. 200 kJ/mol

Most enzymes are made up of proteins and therefore may be inactivated by A. changes in temperature B. changes in pH C. salt concentration D. all of the above

A metal ion required for enzyme activity is called a. cofactor b. a proenzyme c. a subtrate d. a zymogen

Since the air bubbles in bread are generated by yeast, how will the spaces in this bread compare to those in a loaf made using normal yeast?   A. more bubbles    B. differently-shaped bubbles   C. smaller bubbles   D. bubbles more on the interior of the loaf

Enzymes are important biological catalysts because they: Lower the activation energy of a biochemical reaction Lower the entropy of a biochemical reaction Increase the free energy of a biochemical reaction Supply the energy to initiate a biochemical reaction

Many enzymes help in cellular respiration. Using the figure to the right, explain the difference between this reaction with and without an enzyme. You must use the following terms in your answer; active site, induced fit, substrate and activation 1. Enzyme Action Without enzyme Activation energy without enzyme energy. With enzyme Activation energy with enzyme Reactants: Glucose + 0, Overall energy released during reaction Products: co, + H,0 Do NOT answer both questions 2 and 3. Choose only ONE to answer in the space provided. 2. The enzyme catalase is a polypeptide. Would you expect this enzyme to move through the cell membrane via simple diffusion? Explain your answer and provide a possible solution if catalase can't move across a membrane. 3. It is important for humans to make sure they consume small amounts of minerals (e.g. magnesium oxide or zinc oxide) in their food or in a supplement of some sort. Explain the value that some minerals play in assisting with many of our body's…

What roles do enzymes play in nature? Group of answer choices A.They have a role in metabolic reactions B. They increase rates of reaction but do not shift the equilibrium formed between products and reactants C. They catalyze cellular processes D. All of the above

When maltose is broken down into glucose monosaccharides, in an enzymatic reaction, the maltosemolecule is properly called:A. the substrateB. the productC. the catalystD. the enzymeE. the inhibitor