The answers are
6. D. NAD
7. B. ATP
8. C.
9. B. They can be alered during transition state
10.B. Lowering the activation energy of a reaction and thus
speeding up the reaction.
Which molecule "holds electrons" that can be used for energy transfer in living systems? a dATP...
An enzyme facilitates chemical reactions by: Select one: a. Increasing the free-energy difference between reactants and products. b. Decreasing the free-energy difference between reactants and products. c. Lowering the activation energy of the reaction. d. Raising the activation energy of the reaction. e. None of the above. Q2. Enzymes are important components of biological systems because they: Select one: a. Speed up reactions. b. Reduce the activation energy of reactions allowing them to occur. c. Catalyze specific reactions, allowing for...
barrier? Can lowering the activation energy make a reaction go in either direction spontaneously? What if the concentrations of products and reactants were altered, making the reverse reaction a thermodynamically favored reaction. Could the enzyme function to speed up the reverse reaction in those circumstances?
Which of the following statements is TRUE about the TCA cycle? a. oxygen is not used and so the TCA cycle can occur in anaerobic conditions b. The TCA cycle produces two water molecules per glucose molecule c. The carbons from a pyruvate are released in one full turn of the TCA cycle d. FAD is a covalently bound coenzyme in the TCA cycle e. More than one of these statements is true In glycolysis, fructose 1, 6-bisphosphate is converted...
Rodrigo is an enzyme engineer. He wants to know which of four peptide substrates is bound most tightly by his engineered enzyme. Which value should he measure and pay attention to? Km KCAT Vo Both A and B kcat, [S], and [E]t Rodrigo's enzyme was assayed with three substrates (A, B, and C). The SAME enzyme concentration used was for each of the three reactions. The results of the three experiments are plotted as Lineweaver-Burke plots below. Considering what you...
Choice - Chapter 6 - Question 3 Part A Which of the following is true for anabolic pathways? They consume energy to build polymers from monomers. They do not depend on enzymes. They are usually spontaneous chemical reactions. They release energy as they degrade polymers to monomers. Submit Request Answer rovide Feedback Part D What name is given to the reactants in an enzymatically catalyzed reaction? reactors substrate active sites products Submit Request Answer Part E As a result of...
2 6. Which of the following is true of enzymes? The majority of enzymes are nonspecific b. The majority of enzymes operate under extremely high temperatures e. They are biological catalysts d. They are all irreversible 7. Activation energy is a. Energy that must be added to a reaction started, which is recovered as the reaction proceeds b. Difference in energy between reactants and products c. Energy lost as heat d. free energy 8. Metal ions enhance catalysis by a....
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
Use the graph to answer the questions. Which part of the graph represents activation energy? A C E B D Which one choose the best definition for activation energy? 1. energy produced by an object in motion 2. energy that must be added to start a reaction 3. energy released during a chemical reaction 4. energy difference between reactants and products in a reaction 5. energy that is stored in chemical bonds Energy > - - - - - -...
in cardiac 5. Cell-cell communication junctions in plants are called and muscle cells (animal). A. plasmodesmata, anchoring junction B. plasmodesmata gap junction C. stomata; anchoring junction D. stomata; conjunction junction Estomata; gap junction 6. Actin is found in A. cellulose B. intermediate filament C.microfilament D. microtubule E. cristae 7. Based on the endosymbiont theory which was once a free living prokaryote? A. nucleus B. Golgi C. Mitochondria D. rough endoplasmic reticulum E. B and D 8. Active transport A. occurs...
Enzymes are important to biology because they can be used to Select one: O a. Control when chemical reactions happen O b. Control where chemical reactions occur O c. Link different chemical reactions O d. Couple ATP hydrolysis to activity O e. All of the above Diffusion is the movement of solute propelled by collisions with water. Diffusion spontaneously transforms energy concentration gradients into energy equilibrium conditions just like any other spontaneous reaction. Select one: O a. high; high O...