Biochemistry: Principles of Metabolic Regulation: Glucose (1-21)

What is one of the possible fates of glucose 6-phosphate in the regulation of glucose breakdown?

• Conversion into fructose 1,6-bisphosphate for glycolysis

• Passage into glycolysis for ATP production

• Direct conversion into glucose for storage

• Breakdown into carbon dioxide and water

Which pathway is involved in the production of NADPH from glucose 6-phosphate?

• Glycolysis

• Citric acid cycle

• Pentose phosphate pathway

• Lactic acid fermentation

What is a biochemical use of glucose 6-phosphate besides energy production?

• Synthesis of amino acids

• Synthesis of neuraminic acid for protein glycosylation

• Direct use in muscle contraction

• Conversion into ethanol

How can E. coli use glucose in its metabolism?

• Only for energy production via ATP

• To make the carbon skeleton of every one of its molecules

• Exclusively for protein synthesis

• Solely for lipid storage

What is the primary goal of metabolic regulation in cells?

• To increase energy consumption

• To maintain homeostasis at the molecular level

• To decrease the number of metabolic pathways

• To simplify biochemical reactions

What does metabolic control in cells lead to?

• A decrease in the complexity of metabolic pathways

• A static response to environmental changes

• A change in the output of a pathway over time in response to a signal or change in circumstances

• An immediate halt of all metabolic activities

Which of the following is NOT a category shown in the metabolic pathways diagram?

• Protein Synthesis

• Nucleotide Metabolism

• Lipid Metabolism

• Carbohydrate Metabolism

What term describes the state where the mass and gross composition of the cell remain fairly constant over time despite the entry and exit of materials?

• Metabolic equilibrium

• Homeostasis

• Dynamic equilibrium

• Static state

What happens when the steady state of a cell is disturbed?

• The cell dies immediately

• Pathways remain unchanged

• Pathways are changed to return the organism to a new steady state

• The cell stops all metabolic activity

What is the role of regulatory mechanisms in catabolic pathways?

• To decrease the rate of metabolite movement

• To stop the production of metabolites

• To ensure metabolites move in the correct direction and rate to match the organism's needs

• To randomize the movement of metabolites