Exam 5: Ground Rules of Metabolism

An enzyme is thought to optimize the fit between substrates by restraining and stretching or squeezing them into certain shapes and moving them to the transition state as described by the ____ model of enzyme activity.

Classification.The items below are processes that occur during different stages of photosynthesis.Answer the following questions by selecting one of these three processes. a.oxidation b.reduction c.phosphorylation -Some enzymes are controlled by having nonsubstrates bind to a nonactive site and result in a change in their overall structure; these are called __________.

Which of the following is an application of the first law of thermodynamics?

Which of the following statements is false?

Which of the following statements about exergonic reactions is false?

Classification.The items below are processes that occur during different stages of photosynthesis.Answer the following questions by selecting one of these three processes. a.oxidation b.reduction c.phosphorylation -Discuss the role of turgor in the crisp lettuce purchased at the grocery store looking much limper by the time it gets home.

In some cases, inhibitors or activators of enzyme-catalyzed reactions act by

Which of the following quantities of alcoholic beverages have the least damaging effect on the liver?

Which of the following statements is false?

During receptor-mediated endocytosis

Which statement is NOT true?

Classification.The items below are processes that occur during different stages of photosynthesis.Answer the following questions by selecting one of these three processes. a.oxidation b.reduction c.phosphorylation -The loss of an electron by a molecule is called __________.

MATCHING Matching.Choose the one most appropriate answer for each. a.rate of forward reaction about equals rate of reverse reaction b.coenzyme that diffuses freely through the cytoplasm c.attachment of a phosphate group by a high-energy bond d.an excess of end-product molecules alters the shape of the first enzyme in the pathway and shuts off that metabolic pathway e.part of an enzyme that binds to the substrate f.by binding a regulatory molecule, it changes the activity of a metabolic pathway g.affects rates of chemical reactions h.universal energy currency i.assists in the detoxification of ethanol j. a measure of the degree of energy change after a concentrated form of energy has been dispersed -catalase

All of the following are factors in enzyme-catalyzed reactions that work alone or in combination to lower the activation energy EXCEPT

Which of the following is NOT true of enzyme behavior?

MATCHING Matching.Choose the one most appropriate answer for each. a.rate of forward reaction about equals rate of reverse reaction b.coenzyme that diffuses freely through the cytoplasm c.attachment of a phosphate group by a high-energy bond d.an excess of end-product molecules alters the shape of the first enzyme in the pathway and shuts off that metabolic pathway e.part of an enzyme that binds to the substrate f.by binding a regulatory molecule, it changes the activity of a metabolic pathway g.affects rates of chemical reactions h.universal energy currency i.assists in the detoxification of ethanol j. a measure of the degree of energy change after a concentrated form of energy has been dispersed -NADP⁺

A "high-energy bond" in ATP

The active site of an enzyme

Which of the following statements is false?

CO₂ and H₂O will not form glucose on their own because