Bch 211 - Exam 3

44 Questions | Total Attempts: 83

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Bch 211 - Exam 3

Study for final


Questions and Answers
  • 1. 
    The chief use of acetyl coenzyme A is to provide fuel for 
    • A. 

      Glycolysis

    • B. 

      The electron transport chain

    • C. 

      The anaerobic sequence

    • D. 

      The citric acid cycle

  • 2. 
    Most cellular ATP is produced within the 
    • A. 

      Nucleus

    • B. 

      Mitochondria

    • C. 

      Chloroplast

    • D. 

      Cytoplasm

  • 3. 
    Which of the following vitamins serve as part of the coenzyme FAD?
    • A. 

      Thiamine

    • B. 

      Niacin

    • C. 

      Riboflavin

    • D. 

      Retinol

  • 4. 
    An enzyme which catalyzes the conversion of -CH2-CH2 to -CH=CH- would most likely be accompanied by the coenzyme 
    • A. 

      A

    • B. 

      NAD+

    • C. 

      NADH

    • D. 

      FAD

  • 5. 
    Which of the following is a product of glycolysis?
    • A. 

      Pyruvate

    • B. 

      CO2 + H2O

    • C. 

      Lactase

    • D. 

      Acetyl CoA

  • 6. 
    Glycolysis occurs within the 
    • A. 

      Mitochondria

    • B. 

      Nucleus

    • C. 

      Vacuoles

    • D. 

      Cytoplasm

  • 7. 
    Under aerobic conditions in the body, pyruvate is converted to 
    • A. 

      Lactate

    • B. 

      Acetyl CoA

    • C. 

      Ethanol

    • D. 

      Acetaldehyde

  • 8. 
    Each turn of the citric acid cycle produces __________ molecules of CO2
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 9. 
    In the electron transport chain, FADH2 delivers hydrogen ions and electrons to 
    • A. 

      Coenzyme Q

    • B. 

      NAD+

    • C. 

      Flavoprotein (FP)

    • D. 

      Cytochrome b

  • 10. 
    The final acceptor of electrons during electron transport is
    • A. 

      NAD

    • B. 

      NADH2

    • C. 

      FAD

    • D. 

      O2

  • 11. 
    The majority of ATP produced during the catabolism of glucose is formed during
    • A. 

      Oxidative phosphorylation

    • B. 

      Glycolysis

    • C. 

      The citric acid cycle

    • D. 

      The formation of acetyl CoA

  • 12. 
    Glycogen is stored primarily in the liver and the
    • A. 

      Heart

    • B. 

      Pancreas

    • C. 

      Muscles

    • D. 

      Fat deposits

  • 13. 
    Glycogenolysis can be correctly represented by which of the following
    • A. 

      Glucose -> glycogen

    • B. 

      Glycogen -> glucose

    • C. 

      Pyruvate -> glycogen

    • D. 

      Glycogen -> pyruvate

  • 14. 
    The bulk of the energy utilized by marathon runners is provided by 
    • A. 

      Blood glucose

    • B. 

      Glycogen

    • C. 

      Protein

    • D. 

      Fatty acids

  • 15. 
    Synthesis of glucose from pyruvate during the Cori cycle occurs primarily in the 
    • A. 

      Muscles

    • B. 

      Liver

    • C. 

      Bloodstream

    • D. 

      Heart tissue

  • 16. 
    The main source of energy for the brain is
    • A. 

      Glucose

    • B. 

      Fatty acids

    • C. 

      Glycogen

    • D. 

      Glycerol

  • 17. 
    Which of the following hormones acts to lower the blood glucose level?
    • A. 

      Glucagon

    • B. 

      Insulin

    • C. 

      Epinephrine

    • D. 

      More than one response is correct

  • 18. 
    Each turn of the citric acid cycle produces ___ NADH coenzyme(s).
    • A. 

      0

    • B. 

      1

    • C. 

      2

    • D. 

      3

  • 19. 
    The order of compounds in the conversion of glucose to pyruvic acid is as follows:  (PEP = phosphoenolpyruvate)
    • A. 

      Option 1

    • B. 

      Option 2

    • C. 

      Fructose-6-phosphate, fructose-bisphosphate, 1,3-phosphoglyceric acid, 3-phosphoglyceric acid, PEP

    • D. 

      Option 4

  • 20. 
    In the Cori cycle
    • A. 

      Lactic acid is transported from the liver to muscle by the blood

    • B. 

      Lactic acid is transported from the liver to the kidneys by the blood

    • C. 

      Glycolysis takes place in muscle and gluconeogenesis in the liver

    • D. 

      Glycolysis takes place in the liver and gluconeogenesis in muscle

  • 21. 
    Glycolysis
    • A. 

      Does not require O2 to generate energy

    • B. 

      Requires O2 to generate energy

    • C. 

      Is inhibited by O2

    • D. 

      Rate is increased in presence of O2

  • 22. 
    Gluconeogenesis is the synthesis of 
    • A. 

      Glucose from non-carbohydrate precursors

    • B. 

      Glycogen from glucose

    • C. 

      Pyruvate from glucose

    • D. 

      Fatty acids from glucose

  • 23. 
    In the diagram of the citric acid cycle shown, What do the two points indicated by an asterisk have in common. 
    • A. 

      Draw structure of CitrateĀ 

    • B. 

      Draw structure of Succinate

    • C. 

      How man carbons does Malate have? (ans: 4)

  • 24. 
    In humans, pyruvate can be converted to
    • A. 

      Acetyl-CoA only

    • B. 

      Lactate only

    • C. 

      Ethanol only

    • D. 

      Acetyl-CoA or lactate

  • 25. 
    What is the net ATP yield per glucose during glycolysis?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

    • E. 

      6

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