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- When you exercise, your muscles are using ATP to do the movements. Thus, the cell is doing cellular respiration in order to replace the ATP it has used. A) Draw a series of diagrams showing the energy transfers that occur during exercise (include: ATP, muscle, heat, cell respiration, glucose). B) When we exercise, we produce a lot of heat, to cool us down, our body produces sweat. According to the laws of thermodynamics, where is the heat coming from? C) When we exercise to lose weight, where is that mass going (do we sweat it out, it turns into heat, becomes digestive waste, how do we eliminate it?)?Which of the following statements is most directly described by the first law of thermodynamics? A B с D The synthesis of highly-ordered biomolecules is coupled with the production of heat energy. All energy-transferring processes involve the loss of some of that energy into an unus- able form. Enzymes reduce the activation energy of chemical energy by stabilizing substrates at their transition states. The energy for the synthesis of glucose is provided by the absorption of light energy in chlorophyll pigments.Which of the following is a description of an example of the second law of thermodynamics? Some chemical energy in glucose transforms to chemical energy in ATP. O The kinetic energy of wind turns the blades of a wind turbine. The chemical energy in gasoline is transformed to kinetic energy to drive a car. The mechanical energy of flowing water turns a turbine. Some chemical energy in gasoline is transformed to heat while driving a car.
- How do we get energy from the food we eat? Is this an exergonic or endergonic process? Why? How do the first and second laws of thermodynamics play a role in this process? Why is it important to have energy transferred from the food you eat to ATP?1) From a cellular standpoint, what is the difference between kinetic and potential energy? What is the major molecule that cells use for energy? What are high energy molecules found in the cell and how are they used to make ATP? 2)What are NAD+, NADH, FAD+, FADH2. How’s it regulated?The first law of thermodynamics states that the amount of energy in the universe is constant, but that the various forms of energy can be interconverted. Describe four different types of such energy transduction that occur in living organisms and provide one example for each
- Discuss the following statement: “enzymes and heat are alike in that both can speed up reactions that—although thermodynamically feasible—do not occur at an appreciable rate because they require a high activation energy. diseases that seem to benefit from the careful application of heat—in the form of hot chicken soup, for example—are therefore likely to be due to the insufficient function of an enzyme.”Select the correct statement regarding electrochemical gradients. Thermodynamically, electrochemical gradients will maintain their relative concentrations across both sides of the membrane. The cytoplasmic side of the cell membrane has a net positive charge relative to the extracellular side. Ions can freely pass through the cell membrane. Electrochemical gradients are sources of potential energy due to the differences in concentrationsand charge across both sides of the cell membrane. Select the correct statement(s) about transfer RNAs. Codon recognition occurs through specific base-pairing by the anticodon arm. Amino acids are linked to the T-loop. They are transcribed by RNA Polymerase III. There is strict matching requirements at the third position, else the tRNA cannot interact with the codon.The oxidation of sugar molecules by the cell takes place according to the general reaction C6H12O6 (glucose) + 6O2 → 6CO2 + 6H2O + energy. which of the following statements are correct? explain your answers. all of the energy produced is in the form of heat. none of the produced energy is in the form of heat. The energy is produced by a process that involves the oxidation of carbon atoms. The reaction supplies the cell with essential water. in cells, the reaction takes place in more than one step. many steps in the oxidation of sugar molecules involve reaction with oxygen gas. some organisms carry out the reverse reaction. some cells that grow in the absence of O2 produce CO2.
- Although ATP supplies energy to an endergonic reaction, why is it not considered a fuel?Life is sometimes described as a constant struggle against the second law of thermodynamics. How do organisms succeed in this struggle?In hepatocytes, the enzyme glucokinase catalyzes the ATP-coupled phosphorylation of glucose. Glucokinase binds both ATP and glucose, forming a glucose-ATP-enzyme complex. The enzyme then transfers the phosphoryl group directly from ATP to glucose. Select the advantages of phosphoryl group transfer compared to hydrolysis and subsequent phosphorylation? ATP hydrolysis is thermodynamically unfavorable compared to group transfer. Glucokinase increases the transition state energy, favoring glucose phosphorylation. The process takes advantage of the high phosphoryl group transfer potential of ATP. Reaction intermediates do not need to be present in excess. Incorrect