BIOL 1115 Lecture 7: Chapter 7
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1.Oxygen that is consumed during cellular respiration is returned to the environment once it has been combined with which of the following substances?
ATP or inorganic phosphates | |
elemental carbon | |
nitrates or sulfates | |
glucose or nitrogen | |
carbon or hydrogen |
2.Redox reactions involving Fe2+ and Fe3+ occur during aerobic cellular respiration. Where do these reactions take place?
Krebs cycle | |
glycolysis | |
the electron transport chain | |
the outer mitochondrial membrane | |
the cell membrane |
3.The alternate fates of pyruvate in various organisms is primarily due to
optimizing the concentration of important biochemical intermediates | |
regenerating NAD+ for further reduction in the cytoplasm | |
maximizing ATP production in the mitochondrion | |
maximizing electron flow through the electron transport chain | |
none of the above |
Question 1
Which of the following statements regarding photosynthesis and cellular respiration is true?
A. | Photosynthesis occurs in mitochondria, and cellular respiration occurs in chloroplasts. | |
B. | Photosynthesis occurs in chloroplasts, and cellular respiration occurs in mitochondria. | |
C. | Photosynthesis occurs in mitochondria and in chloroplasts. |
Question 2
How do cells capture the energy released by cellular respiration?
A. | They produce glucose | |
B. | The energy is coupled to oxygen | |
C. | They produce ATP |
Question 3
During redox reactions
A. | the loss of electrons from one molecule is called reduction | |
B. | electrons are lost from one substance and added to another substance | |
C. | protons from one molecule replace the electrons lost from another molecule |
Question 4
Oxidation is the ________, and reduction is the ________.
A. | gain of oxygen; loss of oxygen | |
B. | loss of electrons; gain of electrons | |
C. | gain of protons; loss of protons |
Question 5
During cellular respiration, NADH
A. | delivers its electron load to the first electron carrier molecule. | |
B. | is chemically converted into ATP | |
C. | is the final electron acceptor |
Question 6
A drug is tested in the laboratory and is found to create holes in both mitochondrial membranes. Scientists suspect that the drug will be harmful to human cells because it will inhibit
A. | the citric acid cycle only. | |
B. | glycolysis only | |
C. | the citric acid cycle and oxidative phosphorylation |
Question 7
Which of the following metabolic pathways is common in aerobic and anaerobic metabolism?
A. | glycolysis | |
B. | the citric acid cycle | |
C. | electron transport chain |
Question 8
Which of the following is a result of glycolysis?
A. | production of CO2 | |
B. | a net loss of two ATPs per glucose molecule | |
C. | conversion of glucose to two three-carbon compounds |