2-L1
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What is the purpose of building block molecules in cell metabolism?

  • To break down larger molecules into smaller ones
  • To provide energy for cell functions
  • To release free energy through oxidation reactions
  • To synthesize cell components needed for growth and maintenance (correct)

    • What is the role of organic precursor molecules in cell metabolism?

  • To provide energy for cell functions
  • To synthesize cell components needed for growth and maintenance
  • To release free energy through oxidation reactions
  • To allow the inter-conversion of building block molecules (correct)

    • What is the function of NADPH in cell metabolism?

  • To provide energy for cell functions
  • To synthesize cell components needed for growth and maintenance
  • To provide biosynthetic reducing power in the synthesis of cell components (correct)
  • To release free energy through oxidation reactions

    • What is the main difference between catabolic and anabolic pathways?

    <p>Catabolic pathways are oxidative, while anabolic pathways are reductive</p> Signup and view all the answers

    What is the purpose of catabolic pathways in cell metabolism?

    <p>To break down larger molecules into smaller ones, releasing energy</p> Signup and view all the answers

    What is the relationship between oxidation and reduction reactions in cell metabolism?

    <p>Oxidation reactions always accompany reduction reactions</p> Signup and view all the answers

    What is the name of the process by which ATP is produced from ADP in glycolysis?

    <p>Substrate level phosphorylation</p> Signup and view all the answers

    What is the purpose of creatine phosphate in muscle cells?

    <p>To act as a small store of free energy</p> Signup and view all the answers

    What happens to creatine and creatine phosphate in muscle cells?

    <p>They undergo non-enzymatic chemical changes</p> Signup and view all the answers

    What is the significance of creatinine in the body?

    <p>It is a waste product with no function</p> Signup and view all the answers

    What can be inferred from the daily excretion of creatinine?

    <p>The individual's muscle mass is stable</p> Signup and view all the answers

    What is the difference in daily creatinine excretion between males and females?

    <p>Males excrete more creatinine than females</p> Signup and view all the answers

    What is the oxidized form of nicotinamide adenine dinucleotide?

    <p>NAD</p> Signup and view all the answers

    What is the main function of carrier molecules in cells?

    <p>To act as carriers of reducing power</p> Signup and view all the answers

    What is the role of vitamins in relation to carrier molecules?

    <p>To supply components of carrier molecules that cannot be synthesized in the body</p> Signup and view all the answers

    What is the result of all NAD in a cell being in the reduced form (NADH)?

    <p>Oxidation reactions that require NAD+ are not possible</p> Signup and view all the answers

    What is the purpose of the electron transport reactions in cell respiration?

    <p>To oxidize NADH and FADH2</p> Signup and view all the answers

    What is the total concentration of carrier molecules in cells?

    <p>Constant</p> Signup and view all the answers

    What is the main purpose of measuring blood concentrations of cell nutrients and their waste products?

    <p>To diagnose and monitor metabolic diseases</p> Signup and view all the answers

    What happens to the blood concentration of cell nutrients and their waste products under normal physiological conditions?

    <p>It remains relatively constant</p> Signup and view all the answers

    Which of the following situations is associated with pathological changes in blood concentrations of cell nutrients and their waste products?

    <p>Diabetes and atherosclerosis</p> Signup and view all the answers

    What is the normal fasting plasma concentration of glucose in mmol/L?

    <p>5</p> Signup and view all the answers

    What is the primary function of capillaries in the context of cell metabolism?

    <p>To transport nutrients into the cell</p> Signup and view all the answers

    What is the primary function of ATP in cells?

    <p>To act as a carrier of free energy</p> Signup and view all the answers

    What happens when the concentration of ATP falls and the concentration of ADP and/or AMP increases?

    <p>Catabolic pathways are activated</p> Signup and view all the answers

    What is the significance of the high energy of hydrolysis bond in ATP?

    <p>It allows ATP to release relatively large amounts of free energy</p> Signup and view all the answers

    What is the role of ATP in signaling energy levels in cells?

    <p>It signals adequate energy levels for immediate needs</p> Signup and view all the answers

    What is the significance of the rate of ATP turnover in cells?

    <p>It indicates that energy is required to drive cellular activities</p> Signup and view all the answers

    What is the characteristic of other phosphorylated compounds besides ATP?

    <p>They have high energies of hydrolysis</p> Signup and view all the answers

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