Que 1
Ans:
The following is true: b. Activation energy is required to initiate exergonic reactions.
Explanation:
- A chemical reaction that release energy is exergonic.
- Exergonic reactions require some amount of energy input to get going, before they can proceed with their energy releasing steps.
- Hence, activation energy is required to initiate exergonic reactions.
Que 2
Ans:
a. Photosynthesis is not an example of an exergonic reactions.
Explanation:
- Photosynthesis is an endergonic reaction because it require energy.
- Exergonic reaction release energy.
Thinking Through the Concepts Multiple Choice 1. Which of the following is True? a. Enzymes increase...
QUESTION 6 True or false: Anaerobic organisms cannot make ATP. True O False QUESTION 7 Which of the following is a reactant of the first reaction of glycolysis? O Glucose O ADP ОАТР O 02 O Both glucose and ATP QUESTION 8 Each of the following is a high-energy product of glycolysis. From which of these can anaerobic organisms harvest the stored energy? I.e. Which of these is/are useful to an anaerobe? ОАТР O NADH O Pyruvate O All of...
QUESTION 1 Which of the following is NOT a product of the Citric Acid Cycle? O Citric acid O CO2 O NADH O FADH2 O All of the above are products QUESTION 2 What do glycolysis and the Citric Acid Cycle have in common? O They both involve oxidation of glucose. O They both occur in the cytoplasm. O They both produce CO2 O They both produce ATP and NADH QUESTION 3 Pyrimidines are synthesized through a long series of...
What is the critical difference between passive and active transport? A. passive requires energy but active does not B. passive requires no energy, but active does C. passive and active each require energy, but passive requires less What is an enzyme? A. a protein that facilitates a reaction B. a protein that supplies water for hydrolysis reactions C. a protein that absorbs water during dehydration reactions The First Law of Thermodynamics states: A. energy can be changed from one form...
Determine if the statement given is true or false. If it is false, change the underlined word(s) so that the statement reads true. ___ Within a closed system, the amount of energy is variable over time. ___ A fire creates energy. ___ The second law of thermodynamics is concerned with entropy. ___ Photosynthesis and similar reactions decrease entropy. ___ Eventually, all molecules in the universe will become randomly dispersed. ___ Reactions that release energy are endergonic. ___ Enzymes increase the...
1.Energy stored in the covalent bonds of a molecule of C6H12O6 would best be described as? Why wouldn't it be kinetic energy? 2.Reaction (1) is A + B <--> C + H2O. It is endergonic with a ΔG = 6.3 kcal/mol Reaction (2) is ATP + H2O <--> ADP + Pi . It is exergonic with a ΔG = -7.3 kcal/mol If these two reactions are coupled, what is the overall free energy for the reaction? 3.For enzyme catalzyed reactions, what...
1. 2. 3. Select the true statement regarding thermodynamics. C) The △G" of a reaction is zero at equilibrium. 0 The standard state for solutes is 1.00 M The standard state for gases is 1 Torr. The ΔG of a reaction is independent of the equilibrium constant A reaction proceeds via the following equation A solution of A and B are allowed to react unti the reaction stops. The final concentrations of the reactants and products are 25 mM A...
13. Describe 2 mechanisms whereby ATP is generated during cellular respiration Mechanism 1: Mechanism 2: 14. Indicate the MAIN molecules that enter and exit each of these processes? Molecule(s) IN Process Molecule(s) OUT Glycolysis Pyruvate Oxidation Citric Acid/Krebs Cycle ETC Photophosphorylation Calvin Cycle 15. Isocitrate is a 6 carbon molecule that is oxidized to a-ketoglutarate (a 5 carbon molecule) by the enzyme isocitrate dehydrogenase. What happens to the extra carbon atom in this reaction and in which process (listed in...
Comparing an uncatalyzed reaction to the same reaction with a catalyst, which one of the following is always true? O The catalyzed reaction will be exergonic. O The catalyzed reaction will have higher activation energy. O The catalyzed reaction will be endergonic. O The catalyzed reaction will have lower activation energy.
Which of the following molecules would require a transport protein to cross the membrane? A. Carbon Dioxide B. Oxygen C. Glucose D. A&B E. All of the above What is energy coupling? A. An enzyme reducing activation energy B. The hydrolysis of ATP to ADP and inorganic phosphate C. The use of energy released from an exergonic reaction to power an endergonic reaction D. All of the above are examples of energy coupling Peroxisomes A.Contains enzyme to produce hydrogen peroxide...
The formation of glucose-1-phosphate from glucose and orthophosphate has a G of + 20.9 kJ/mol. If this reaction were coupled to another reaction in order to produce an exergonic reaction, which of the following would produce an overall endergonic reaction and therefore not be suitable for coupling? A) creatine phosphate + H2O creatine + Pi B) AMP + H2O adenosine + Pi C) ATP + H2O AMP + PPi D) ATP + H2O ADP + Pi...