Exam 13: Bioenergetics and Biochemical Reaction Types

Explain what is meant by the statement: "Standard free-energy changes are additive." Give an example of the usefulness of this additive property in understanding how cells carry out thermodynamically unfavorable chemical reactions.

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Question 101

In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change ( $\Delta$ G'°) of 23.8 kJ/mol. Under what conditions encountered in a normal cell will the free-energy change ( $\Delta$ G) be negative, enabling the reaction to proceed spontaneously to the right?

(Multiple Choice)

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Question 102

What is the $\Delta$ G'° for the following reaction if the concentrations of glucose-6-phosphate and glucose-1-phosphate at equilibrium are 19 mM and 1 mM, respectively? glucose-6-phosphate $\leftrightarrow$ glucose-1-phosphate

(Multiple Choice)

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Question 103

In the following reaction, which molecule is the reductant? 1,3-bisphosphoglycerate + NADH + H⁺ $\rightarrow$ glyceraldehyde-3-phosphate + P_i + NAD⁺

(Multiple Choice)

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Question 104

Which statement is TRUE?

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Question 105

Showing 101 - 105 of 105

Explain what is meant by the statement: "Standard free-energy changes are additive." Give an example of the usefulness of this additive property in understanding how cells carry out thermodynamically unfavorable chemical reactions.

What is the $\Delta$ G'° for the following reaction if the concentrations of glucose-6-phosphate and glucose-1-phosphate at equilibrium are 19 mM and 1 mM, respectively? glucose-6-phosphate $\leftrightarrow$ glucose-1-phosphate

In the following reaction, which molecule is the reductant? 1,3-bisphosphoglycerate + NADH + H⁺ $\rightarrow$ glyceraldehyde-3-phosphate + P_i + NAD⁺

Which statement is TRUE?

The Foundations of Biochemistry

Water

Amino Acids, Peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

DNA-Based Information Technologies

Lipids

Biological Membranes and Transport

Biosignaling

Glycolysis, Gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Carbohydrate Biosynthesis in Plants and Bacteria

Lipid Biosynthesis

Biosynthesis of Amino Acids, Nucleotides, and Related Molecules

Hormonal Regulation and Integration of Mammalian Metabolism

Genes and Chromosomes

DNA Metabolism

RNA Metabolism

Protein Metabolism

Regulation of Gene Expression

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Exam 13: Bioenergetics and Biochemical Reaction Types

Explain what is meant by the statement: "Standard free-energy changes are additive." Give an example of the usefulness of this additive property in understanding how cells carry out thermodynamically unfavorable chemical reactions.

What is the Δ\DeltaΔ G'° for the following reaction if the concentrations of glucose-6-phosphate and glucose-1-phosphate at equilibrium are 19 mM and 1 mM, respectively? glucose-6-phosphate ↔\leftrightarrow↔ glucose-1-phosphate

In the following reaction, which molecule is the reductant? 1,3-bisphosphoglycerate + NADH + H+ →\rightarrow→ glyceraldehyde-3-phosphate + Pi + NAD+

Which statement is TRUE?

The Foundations of Biochemistry

Water

Amino Acids, Peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

DNA-Based Information Technologies

Lipids

Biological Membranes and Transport

Biosignaling

Glycolysis, Gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Carbohydrate Biosynthesis in Plants and Bacteria

Lipid Biosynthesis

Biosynthesis of Amino Acids, Nucleotides, and Related Molecules

Hormonal Regulation and Integration of Mammalian Metabolism

Genes and Chromosomes

DNA Metabolism

RNA Metabolism

Protein Metabolism

Regulation of Gene Expression

Filters

What is the $\Delta$ G'° for the following reaction if the concentrations of glucose-6-phosphate and glucose-1-phosphate at equilibrium are 19 mM and 1 mM, respectively? glucose-6-phosphate $\leftrightarrow$ glucose-1-phosphate

In the following reaction, which molecule is the reductant? 1,3-bisphosphoglycerate + NADH + H⁺ $\rightarrow$ glyceraldehyde-3-phosphate + P_i + NAD⁺