Chemistry High School

Which high-energy bond is associated with the succinyl-CoA synthetase reaction?
A) acyl phosphate
B) thioester
C) phosphohistidine
D) mixed anhydride
E) All of the answers are correct

Answers

Answer 1

The high-energy bond associated with the succinyl-CoA synthetase reaction is A. acyl phosphate bond

Succinyl-CoA synthetase is an enzyme that catalyzes the conversion of succinyl-CoA to succinate, with the simultaneous synthesis of ATP or GTP from ADP or GDP, respectively. This reaction is an important step in the citric acid cycle, which is also known as the Krebs cycle or the tricarboxylic acid cycle.

The acyl phosphate bond in succinyl-CoA is a high-energy bond due to the resonance stabilization of the phosphate group, making it a favorable source of energy. When succinyl-CoA synthetase cleaves this bond, the energy released is used to phosphorylate the nucleoside diphosphate (ADP or GDP), forming a high-energy nucleoside triphosphate (ATP or GTP). Although options B, C, and D represent other types of high-energy bonds, they are not directly associated with the succinyl-CoA synthetase reaction. Therefore, the correct answer is A) acyl phosphate. So therefore the correct answer is A. Acyl phosphate bond, the high-energy bond associated with the succinyl-CoA synthetase reaction.

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Related Questions

the metal germanium melts at a temperature of 937 °c and boils at 2830 °c, whereas the metal bismuth melts at a temperature of 271 °c and boils at 1560 °c.
(a) Which metal will be more volatile at room temperature? (b) Predict which of the two molten metals has the larger surface tension at its melting point. High in the mountains, an explorer notes that the water for tea is boiling vigorously at a temperature of 88 °C. Use the data in the table below to estimate the atmospheric pressure at the altitude of the camp Estimate AHn for water between S8 and 90 °C Atmospheric pressure = atm kJ/mol AHvap= Vapor Pressure of Water at Various Temperatures. T °C P atm 77 78 0.413 0.431 0.449 79 0.467 80 81 0.486 0.506 82 83 0.527 0.548 0.571 84 85 0.593 86 87 0.617 0.641 88 0.666 89 0.692 0.719 0.746 90 91 92 0.774 0.804 93 94

Answers

Bismuth will be more volatile at room temperature because it has a lower boiling point than germanium. Germanium is predicted to have the larger surface tension at its melting point. The atmospheric pressure at the altitude of the camp is approximately 0.641 atm.

Volatility refers to a substance's ability to vaporize or evaporate. Bismuth has a lower boiling point (1560 °C) compared to germanium (2830 °C), which means that it requires less energy to convert bismuth into a gas. As a result, bismuth will be more volatile at room temperature than germanium. Surface tension refers to the attractive force between the molecules at the surface of a liquid. At the melting point, the intermolecular forces between the molecules are weakened, which results in a decrease in surface tension. However, germanium has a higher boiling point (2830 °C) compared to bismuth (1560 °C), which means that germanium has stronger intermolecular forces between its molecules. As a result, germanium is predicted to have a higher surface tension at its melting point compared to bismuth.

Atmospheric pressure estimation for:
1. Identify the given boiling point of water at the camp: 88 °C.
2. Use the provided table to find the corresponding vapor pressure at 88 °C: P(atm) = 0.666 atm.
3. The vapor pressure at boiling point is equal to the atmospheric pressure. Thus, the atmospheric pressure at the altitude of the camp is approximately 0.641 atm.

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Bismuth will be more volatile at room temperature because it has a lower boiling point.

Germanium would have a larger surface tension at its melting point because it has a higher melting point.

Based on the given data, the atmospheric pressure at the altitude of the camp is 0.666 atm.

What are bismuth and germanium?

Bismuth is a heavy metal element with the atomic number 83. It is the most naturally diamagnetic element and has a silvery-white appearance.

Germanium is a metalloid element with the atomic number 32. It has a grayish-white appearance and is chemically similar to tin and silicon.

The atmospheric pressure is determined as follows:

The boiling point of water at the altitude of the camp is 88 °C.

The table of temperatures and vapor pressure of water is given below:

T °C P atm

77 0.413

78 0.499

79 0.467

80 0,486

81 0.506

82 0.527

83 0.548

84 0.571

85 0.593

86 0.617

87 0.641

88 0.666

89 0.692

90 0.719

91 0.746

92 0.774

93 0.804

From the given table, the corresponding vapor pressure at 88 °C, P(atm) is 0.666 atm.

Thus, the atmospheric pressure at the altitude of the camp can be estimated to be approximately 0.666 atm as given in the table.

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